From 3d001c1834a02141c989f65f0363c0514ddac497 Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Wed, 15 Mar 2023 13:50:12 -0700
Subject: [PATCH] Convert config file parsing tests to baseline for easier
 future update verification and adds missing location verification Also fixes
 some of the project reference tests that were setup incorrectly was
 detectable via baselines

---
 src/testRunner/tests.ts                       |    2 +-
 .../config/configurationExtension.ts          |  327 +--
 .../config/convertCompilerOptionsFromJson.ts  |  977 +++------
 .../config/convertTypeAcquisitionFromJson.ts  |  271 +--
 src/testRunner/unittests/config/helpers.ts    |  105 +
 src/testRunner/unittests/config/matchFiles.ts | 1776 ++++-------------
 .../unittests/config/projectReferences.ts     |  355 ----
 .../unittests/config/tsconfigParsing.ts       |  643 +++---
 .../config/tsconfigParsingWatchOptions.ts     |  100 +-
 .../unittests/tsc/projectReferencesConfig.ts  |  253 +++
 ...only once under a case insensitive host.js |  157 ++
 ...y only once under a case sensitive host.js |  157 ++
 ...only once under a case insensitive host.js |  155 ++
 ...s only once under a case sensitive host.js |  155 ++
 ...r a case insensitive host with json api.js |  443 ++++
 ...nsensitive host with jsonSourceFile api.js |  461 +++++
 ...der a case sensitive host with json api.js |  443 ++++
 ... sensitive host with jsonSourceFile api.js |  461 +++++
 ...ailing comments with jsonSourceFile api.js |   18 +
 ...ile as an array with jsonSourceFile api.js |   34 +
 ...ding characters with jsonSourceFile api.js |   27 +
 ...ling characters with jsonSourceFile api.js |   34 +
 ....json to compiler-options with json api.js |   44 +
 ...ompiler-options with jsonSourceFile api.js |   44 +
 ...false to compiler-options with json api.js |   45 +
 ...ompiler-options with jsonSourceFile api.js |   45 +
 ....json to compiler-options with json api.js |   39 +
 ...ompiler-options with jsonSourceFile api.js |   39 +
 ...false to compiler-options with json api.js |   41 +
 ...ompiler-options with jsonSourceFile api.js |   41 +
 ....json to compiler-options with json api.js |   23 +
 ...ompiler-options with jsonSourceFile api.js |   23 +
 ....json to compiler-options with json api.js |   18 +
 ...ompiler-options with jsonSourceFile api.js |   18 +
 ... libs to compiler-options with json api.js |   31 +
 ...ompiler-options with jsonSourceFile api.js |   31 +
 ...fixes to compiler-options with json api.js |   23 +
 ...ompiler-options with jsonSourceFile api.js |   23 +
 ...array to compiler-options with json api.js |   34 +
 ...ompiler-options with jsonSourceFile api.js |   37 +
 ... libs to compiler-options with json api.js |   37 +
 ...ompiler-options with jsonSourceFile api.js |   40 +
 ...ingle to compiler-options with json api.js |   27 +
 ...ompiler-options with jsonSourceFile api.js |   27 +
 ...fixes to compiler-options with json api.js |   29 +
 ...ompiler-options with jsonSourceFile api.js |   29 +
 ...f jsx to compiler-options with json api.js |   31 +
 ...ompiler-options with jsonSourceFile api.js |   34 +
 ... libs to compiler-options with json api.js |   39 +
 ...ompiler-options with jsonSourceFile api.js |   42 +
 ...odule to compiler-options with json api.js |   29 +
 ...ompiler-options with jsonSourceFile api.js |   32 +
 ...ution to compiler-options with json api.js |   27 +
 ...ompiler-options with jsonSourceFile api.js |   30 +
 ...wLine to compiler-options with json api.js |   29 +
 ...ompiler-options with jsonSourceFile api.js |   32 +
 ...arget to compiler-options with json api.js |   27 +
 ...ompiler-options with jsonSourceFile api.js |   30 +
 ....json to compiler-options with json api.js |   28 +
 ...ompiler-options with jsonSourceFile api.js |   31 +
 ....json to compiler-options with json api.js |   23 +
 ...ompiler-options with jsonSourceFile api.js |   26 +
 ... numbers in tsconfig.json with json api.js |   25 +
 ...n tsconfig.json with jsonSourceFile api.js |   25 +
 ... libs to compiler-options with json api.js |   34 +
 ...ompiler-options with jsonSourceFile api.js |   37 +
 ...fixes to compiler-options with json api.js |   27 +
 ...ompiler-options with jsonSourceFile api.js |   27 +
 ...invalid strings with jsonSourceFile api.js |  114 ++
 ...t object at all with jsonSourceFile api.js |   22 +
 ...ompilerOptions' with jsonSourceFile api.js |   24 +
 ...compilerOptions with jsonSourceFile api.js |   24 +
 ....json to typeAcquisition  with json api.js |   38 +
 ...ypeAcquisition  with jsonSourceFile api.js |   38 +
 ....json to typeAcquisition  with json api.js |   20 +
 ...ypeAcquisition  with jsonSourceFile api.js |   20 +
 ....json to typeAcquisition  with json api.js |   20 +
 ...ypeAcquisition  with jsonSourceFile api.js |   20 +
 ....json to typeAcquisition  with json api.js |   25 +
 ...ypeAcquisition  with jsonSourceFile api.js |   28 +
 ....json to typeAcquisition  with json api.js |   25 +
 ...ypeAcquisition  with jsonSourceFile api.js |   28 +
 ....json to typeAcquisition  with json api.js |   34 +
 ...ypeAcquisition  with jsonSourceFile api.js |   34 +
 ...perty to typeAcquisition  with json api.js |   24 +
 ...ypeAcquisition  with jsonSourceFile api.js |   24 +
 ...perty to typeAcquisition  with json api.js |   24 +
 ...ypeAcquisition  with jsonSourceFile api.js |   24 +
 .../starstart/star with json api.js           |  109 +
 .../starstart/star with jsonSourceFile api.js |  108 +
 ...ays include literal files with json api.js |  116 ++
 ...e literal files with jsonSourceFile api.js |  115 ++
 .../and empty exclude with json api.js        |   62 +
 ...d empty exclude with jsonSourceFile api.js |   61 +
 .../and exclusions with json api.js           |   66 +
 .../and exclusions with jsonSourceFile api.js |   65 +
 ...xplicit recursive include with json api.js |   63 +
 ...cursive include with jsonSourceFile api.js |   62 +
 ...explicit wildcard include with json api.js |   62 +
 ...ildcard include with jsonSourceFile api.js |   61 +
 .../and no exclusions with json api.js        |   60 +
 ...d no exclusions with jsonSourceFile api.js |   59 +
 .../and wildcard include with json api.js     |   59 +
 ...ildcard include with jsonSourceFile api.js |   58 +
 ...t removed due to excludes with json api.js |  111 ++
 ...due to excludes with jsonSourceFile api.js |  110 +
 ...tern starts with starstar with json api.js |   97 +
 ...s with starstar with jsonSourceFile api.js |   96 +
 ...ern starts with starstart with json api.js |   99 +
 ... with starstart with jsonSourceFile api.js |   98 +
 ...latforms case insensitive with json api.js |   39 +
 ...ase insensitive with jsonSourceFile api.js |   37 +
 ... platforms case sensitive with json api.js |   36 +
 ... case sensitive with jsonSourceFile api.js |   34 +
 .../case sensitive with json api.js           |   97 +
 .../case sensitive with jsonSourceFile api.js |   96 +
 ... files when allowJs=false with json api.js |  110 +
 ...n allowJs=false with jsonSourceFile api.js |  109 +
 ....js files using wildcards with json api.js |  117 ++
 ...using wildcards with jsonSourceFile api.js |  116 ++
 ...les with .. in their name with json api.js |  110 +
 .... in their name with jsonSourceFile api.js |  109 +
 .../exclude folders with json api.js          |  114 ++
 ...exclude folders with jsonSourceFile api.js |  113 ++
 ...ject using relative paths with json api.js |  107 +
 ... relative paths with jsonSourceFile api.js |  106 +
 ...udes after a subdirectory with json api.js |  114 ++
 ... a subdirectory with jsonSourceFile api.js |  116 ++
 ...xcludes immediately after with json api.js |  114 ++
 ...mediately after with jsonSourceFile api.js |  116 ++
 .../matchFiles/in excludes with json api.js   |  111 ++
 .../in excludes with jsonSourceFile api.js    |  110 +
 ...iling recursive directory with json api.js |  107 +
 ...rsive directory with jsonSourceFile api.js |  106 +
 ...udes after a subdirectory with json api.js |  102 +
 ... a subdirectory with jsonSourceFile api.js |  104 +
 ...ncludes immediately after with json api.js |  102 +
 ...mediately after with jsonSourceFile api.js |  104 +
 ...ursive directory patterns with json api.js |  108 +
 ...ectory patterns with jsonSourceFile api.js |  107 +
 ...iling recursive directory with json api.js |  102 +
 ...rsive directory with jsonSourceFile api.js |  104 +
 ...s files when allowJs=true with json api.js |  112 ++
 ...en allowJs=true with jsonSourceFile api.js |  111 ++
 ...s files when allowJs=true with json api.js |  112 ++
 ...en allowJs=true with jsonSourceFile api.js |  111 ++
 ...les with .. in their name with json api.js |  108 +
 .... in their name with jsonSourceFile api.js |  107 +
 ...ject using relative paths with json api.js |  112 ++
 ... relative paths with jsonSourceFile api.js |  111 ++
 ...hs outside of the project with json api.js |  110 +
 ... of the project with jsonSourceFile api.js |  109 +
 ...hen in alphabetical order with json api.js |  115 ++
 ...habetical order with jsonSourceFile api.js |  114 ++
 ...g files are still present with json api.js |  105 +
 ...e still present with jsonSourceFile api.js |  104 +
 ...s only a single character with json api.js |  105 +
 ...ingle character with jsonSourceFile api.js |  104 +
 ...declarations are excluded with json api.js |  106 +
 ...ns are excluded with jsonSourceFile api.js |  105 +
 ...tar matches only ts files with json api.js |  106 +
 ...s only ts files with jsonSourceFile api.js |  105 +
 ...e not explicitly included with json api.js |   63 +
 ...icitly included with jsonSourceFile api.js |   62 +
 ...d directories are present with json api.js |   34 +
 ...ies are present with jsonSourceFile api.js |   32 +
 ...th case sensitive exclude with json api.js |  101 +
 ...nsitive exclude with jsonSourceFile api.js |  100 +
 ...folders and empty exclude with json api.js |   69 +
 ...d empty exclude with jsonSourceFile api.js |   68 +
 ...ge folders and exclusions with json api.js |   75 +
 ... and exclusions with jsonSourceFile api.js |   74 +
 ...folders and no exclusions with json api.js |   69 +
 ...d no exclusions with jsonSourceFile api.js |   68 +
 .../matchFiles/with defaults with json api.js |   54 +
 .../with defaults with jsonSourceFile api.js  |   52 +
 ...h jsx=none, allowJs=false with json api.js |   71 +
 ..., allowJs=false with jsonSourceFile api.js |   70 +
 ...th jsx=none, allowJs=true with json api.js |   73 +
 ...e, allowJs=true with jsonSourceFile api.js |   72 +
 ...x=preserve, allowJs=false with json api.js |   74 +
 ..., allowJs=false with jsonSourceFile api.js |   73 +
 ...sx=preserve, allowJs=true with json api.js |   76 +
 ...e, allowJs=true with jsonSourceFile api.js |   75 +
 ...act-native, allowJs=false with json api.js |   74 +
 ..., allowJs=false with jsonSourceFile api.js |   73 +
 ...eact-native, allowJs=true with json api.js |   76 +
 ...e, allowJs=true with jsonSourceFile api.js |   75 +
 .../with literal excludes with json api.js    |  110 +
 ...iteral excludes with jsonSourceFile api.js |  109 +
 ...with literal include list with json api.js |  103 +
 ...al include list with jsonSourceFile api.js |  102 +
 ...ith wildcard include list with json api.js |  103 +
 ...rd include list with jsonSourceFile api.js |  102 +
 ...ple recursive directories with json api.js |  111 ++
 ...ive directories with jsonSourceFile api.js |  110 +
 ...e extensions are excluded with json api.js |  103 +
 ...ns are excluded with jsonSourceFile api.js |  102 +
 .../with recursive directory with json api.js |  107 +
 ...rsive directory with jsonSourceFile api.js |  106 +
 .../with recursive excludes with json api.js  |  120 ++
 ...ursive excludes with jsonSourceFile api.js |  119 ++
 ...ds that match directories with json api.js |   62 +
 ...tch directories with jsonSourceFile api.js |   61 +
 ...dcards that match nothing with json api.js |   63 +
 ...t match nothing with jsonSourceFile api.js |   62 +
 ...itly exclude dotted files with json api.js |   62 +
 ...de dotted files with jsonSourceFile api.js |   61 +
 .../with wildcard excludes with json api.js   |  123 ++
 ...ldcard excludes with jsonSourceFile api.js |  122 ++
 ...ns with literal file list with json api.js |  105 +
 ...teral file list with jsonSourceFile api.js |  104 +
 ...with literal include list with json api.js |  105 +
 ...al include list with jsonSourceFile api.js |  104 +
 .../without wildcards with json api.js        |   60 +
 ...thout wildcards with jsonSourceFile api.js |   59 +
 ...when explicitly requested with json api.js |   24 +
 ...citly requested with jsonSourceFile api.js |   24 +
 ...ly in directory seperator with json api.js |    8 +
 ...ctory seperator with jsonSourceFile api.js |    8 +
 ...e references are provided with json api.js |   16 +
 ...es are provided with jsonSourceFile api.js |   16 +
 ...tionDir unless overridden with json api.js |   42 +
 ...less overridden with jsonSourceFile api.js |   42 +
 ... outDir unless overridden with json api.js |   42 +
 ...less overridden with jsonSourceFile api.js |   42 +
 ...rectory with no .ts files with json api.js |   15 +
 ...th no .ts files with jsonSourceFile api.js |   15 +
 ...rrors for empty directory with json api.js |   15 +
 ...empty directory with jsonSourceFile api.js |   15 +
 ...o references are provided with json api.js |   17 +
 ...es are provided with jsonSourceFile api.js |   20 +
 ...rors for empty files list with json api.js |   16 +
 ...mpty files list with jsonSourceFile api.js |   19 +
 ... errors for empty include with json api.js |   16 +
 ...r empty include with jsonSourceFile api.js |   16 +
 ... for includes with outDir with json api.js |   19 +
 ...des with outDir with jsonSourceFile api.js |   19 +
 ...ent in tsconfig with jsonSourceFile api.js |   55 +
 ... when files is not string with json api.js |   14 +
 ...s is not string with jsonSourceFile api.js |   17 +
 ...hen include is not string with json api.js |   15 +
 ...e is not string with jsonSourceFile api.js |   18 +
 ...aracters in strings correctly jsonParse.js |   29 +
 ... dotted files and folders with json api.js |   22 +
 ...les and folders with jsonSourceFile api.js |   22 +
 ...de common package folders with json api.js |   25 +
 ...package folders with jsonSourceFile api.js |   25 +
 ...eeps string content untouched jsonParse.js |   29 +
 ...mit tsconfig.json file with diagnostics.js |   28 +
 ...ent directories have dots with json api.js |    8 +
 ...ories have dots with jsonSourceFile api.js |    8 +
 ...onfig object without comments jsonParse.js |   33 +
 ...g for file with comments only jsonParse.js |   13 +
 ...or file with only whitespaces jsonParse.js |   13 +
 ...g when config is empty object jsonParse.js |    6 +
 ...en tsconfig have excludes with json api.js |   24 +
 ...g have excludes with jsonSourceFile api.js |   27 +
 ...ers correctly specify library jsonParse.js |   34 +
 ...th error when json is invalid jsonParse.js |   10 +
 .../different options with json api.js        |  148 +-
 ...fferent options with jsonSourceFile api.js |  132 +-
 ...hOptions specified option with json api.js |   18 +-
 ...pecified option with jsonSourceFile api.js |   15 +-
 ...hOptions specified option with json api.js |   15 +-
 ...pecified option with jsonSourceFile api.js |   13 +-
 ...g passed in watch options with json api.js |   33 +-
 ...n watch options with jsonSourceFile api.js |   28 +-
 ...ig file with watchOptions with json api.js |   42 +-
 ...th watchOptions with jsonSourceFile api.js |   36 +-
 ...file without watchOptions with json api.js |   42 +-
 ...ut watchOptions with jsonSourceFile api.js |   36 +-
 .../default-setup-was-created-correctly.js    |  111 ++
 ...ve-composite-if-its-a-container-project.js |   72 +
 ...snt-infer-the-rootDir-from-source-paths.js |   97 +
 ...rors-when-a-file-is-outside-the-rootdir.js |  139 ++
 ...ed-project-reference-doesnt-set-outFile.js |  122 ++
 ...d-project-reference-output-doesnt-exist.js |  139 ++
 .../errors-when-declaration-=-false.js        |  101 +
 ...rs-when-the-file-list-is-not-exhaustive.js |  137 ++
 ...hen-the-referenced-project-doesnt-exist.js |  107 +
 ...eferenced-project-doesnt-have-composite.js |  122 ++
 ...g-when-module-reference-is-not-relative.js |  137 ++
 ...ce-error-when-the-input-file-is-missing.js |  131 ++
 .../redirects-to-the-output-dts-file.js       |  156 ++
 285 files changed, 20671 insertions(+), 3425 deletions(-)
 create mode 100644 src/testRunner/unittests/config/helpers.ts
 delete mode 100644 src/testRunner/unittests/config/projectReferences.ts
 create mode 100644 src/testRunner/unittests/tsc/projectReferencesConfig.ts
 create mode 100644 tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles from an array only once under a case insensitive host.js
 create mode 100644 tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles from an array only once under a case sensitive host.js
 create mode 100644 tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles only once under a case insensitive host.js
 create mode 100644 tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles only once under a case sensitive host.js
 create mode 100644 tests/baselines/reference/config/configurationExtension/under a case insensitive host with json api.js
 create mode 100644 tests/baselines/reference/config/configurationExtension/under a case insensitive host with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/configurationExtension/under a case sensitive host with json api.js
 create mode 100644 tests/baselines/reference/config/configurationExtension/under a case sensitive host with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Allow trailing comments with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file as an array with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file with stray leading characters with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file with stray trailing characters with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json with allowJs is false to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json with allowJs is false to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json with allowJs is false to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json with allowJs is false to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default jsconfig.json to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default jsconfig.json to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default tsconfig.json to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default tsconfig.json to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of libs to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of libs to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of moduleSuffixes to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of moduleSuffixes to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs array to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs array to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes single to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes single to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of jsx to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of jsx to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of libs to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of libs to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module-resolution to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module-resolution to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of newLine to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of newLine to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of target to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of target to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format jsconfig.json to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format jsconfig.json to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format tsconfig.json to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format tsconfig.json to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert negative numbers in tsconfig.json with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert negative numbers in tsconfig.json with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of libs to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of libs to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of moduleSuffixes to compiler-options with json api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of moduleSuffixes to compiler-options with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert tsconfig options when there are multiple invalid strings with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/Don't crash when root expression is not object at all with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/does not raise an error if you've set a compiler flag in the root when you have included 'compilerOptions' with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertCompilerOptionsFromJson/raises an error if you've set a compiler flag in the root without including compilerOptions with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert correctly format tsconfig.json to typeAcquisition  with json api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert correctly format tsconfig.json to typeAcquisition  with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default jsconfig.json to typeAcquisition  with json api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default jsconfig.json to typeAcquisition  with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default tsconfig.json to typeAcquisition  with json api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default tsconfig.json to typeAcquisition  with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format jsconfig.json to typeAcquisition  with json api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format jsconfig.json to typeAcquisition  with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format tsconfig.json to typeAcquisition  with json api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format tsconfig.json to typeAcquisition  with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json to typeAcquisition  with json api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json to typeAcquisition  with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json with only enable property to typeAcquisition  with json api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json with only enable property to typeAcquisition  with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert tsconfig.json with only enable property to typeAcquisition  with json api.js
 create mode 100644 tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert tsconfig.json with only enable property to typeAcquisition  with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/matchFiles/Expands z to z/starstart/star with json api.js
 create mode 100644 tests/baselines/reference/config/matchFiles/Expands z to z/starstart/star with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/matchFiles/always include literal files with json api.js
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 create mode 100644 tests/baselines/reference/config/matchFiles/in excludes after a subdirectory with json api.js
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 create mode 100644 tests/baselines/reference/config/matchFiles/include explicitly listed .min.js files when allowJs=true with json api.js
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 create mode 100644 tests/baselines/reference/config/matchFiles/include paths outside of the project with json api.js
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 create mode 100644 tests/baselines/reference/config/matchFiles/is sorted in include order, then in alphabetical order with json api.js
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 create mode 100644 tests/baselines/reference/config/matchFiles/with non .ts file extensions are excluded with json api.js
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 create mode 100644 tests/baselines/reference/config/matchFiles/with recursive wildcards that match nothing with json api.js
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 create mode 100644 tests/baselines/reference/config/tsconfigParsing/allow dotted files and folders when explicitly requested with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/allow dotted files and folders when explicitly requested with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/correctly parses wild card directories from implicit glob when two keys differ only in directory seperator with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/correctly parses wild card directories from implicit glob when two keys differ only in directory seperator with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/does not generate errors for empty files list when one or more references are provided with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/does not generate errors for empty files list when one or more references are provided with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/exclude declarationDir unless overridden with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/exclude declarationDir unless overridden with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/exclude outDir unless overridden with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/exclude outDir unless overridden with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors for directory with no .ts files with json api.js
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 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors for empty directory with json api.js
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 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list when no references are provided with json api.js
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 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors for empty include with json api.js
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 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors for includes with outDir with json api.js
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 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors for when invalid comment type present in tsconfig with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors when files is not string with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors when files is not string with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors when include is not string with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/generates errors when include is not string with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/handles escaped characters in strings correctly jsonParse.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/ignore dotted files and folders with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/ignore dotted files and folders with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/implicitly exclude common package folders with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/implicitly exclude common package folders with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/keeps string content untouched jsonParse.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/parse and re-emit tsconfig.json file with diagnostics.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/parses wildcard directories even when parent directories have dots with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/parses wildcard directories even when parent directories have dots with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/returns config object without comments jsonParse.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/returns empty config for file with comments only jsonParse.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/returns empty config for file with only whitespaces jsonParse.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/returns empty config when config is empty object jsonParse.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/returns error when tsconfig have excludes with json api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/returns error when tsconfig have excludes with jsonSourceFile api.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/returns object when users correctly specify library jsonParse.js
 create mode 100644 tests/baselines/reference/config/tsconfigParsing/returns object with error when json is invalid jsonParse.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/default-setup-was-created-correctly.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/does-not-error-when-the-referenced-project-doesnt-have-composite-if-its-a-container-project.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/doesnt-infer-the-rootDir-from-source-paths.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-file-is-outside-the-rootdir.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-prepended-project-reference-doesnt-set-outFile.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-prepended-project-reference-output-doesnt-exist.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/errors-when-declaration-=-false.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-file-list-is-not-exhaustive.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-referenced-project-doesnt-exist.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-referenced-project-doesnt-have-composite.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/issues-a-nice-error-when-the-input-file-is-missing-when-module-reference-is-not-relative.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/issues-a-nice-error-when-the-input-file-is-missing.js
 create mode 100644 tests/baselines/reference/tsc/projectReferencesConfig/redirects-to-the-output-dts-file.js

diff --git a/src/testRunner/tests.ts b/src/testRunner/tests.ts
index c95ca207db5fb..b658c72e1fe66 100644
--- a/src/testRunner/tests.ts
+++ b/src/testRunner/tests.ts
@@ -25,7 +25,6 @@ import "./unittests/config/convertCompilerOptionsFromJson";
 import "./unittests/config/convertTypeAcquisitionFromJson";
 import "./unittests/config/initializeTSConfig";
 import "./unittests/config/matchFiles";
-import "./unittests/config/projectReferences";
 import "./unittests/config/showConfig";
 import "./unittests/config/tsconfigParsing";
 import "./unittests/config/tsconfigParsingWatchOptions";
@@ -106,6 +105,7 @@ import "./unittests/tsc/forceConsistentCasingInFileNames";
 import "./unittests/tsc/incremental";
 import "./unittests/tsc/listFilesOnly";
 import "./unittests/tsc/projectReferences";
+import "./unittests/tsc/projectReferencesConfig";
 import "./unittests/tsc/redirect";
 import "./unittests/tsc/runWithoutArgs";
 import "./unittests/tscWatch/consoleClearing";
diff --git a/src/testRunner/unittests/config/configurationExtension.ts b/src/testRunner/unittests/config/configurationExtension.ts
index 8fbc2202b4616..6fe4159834589 100644
--- a/src/testRunner/unittests/config/configurationExtension.ts
+++ b/src/testRunner/unittests/config/configurationExtension.ts
@@ -1,6 +1,8 @@
 import * as fakes from "../../_namespaces/fakes";
+import * as Harness from "../../_namespaces/Harness";
 import * as ts from "../../_namespaces/ts";
 import * as vfs from "../../_namespaces/vfs";
+import { baselineParseConfig, baselineParseConfigHost } from "./helpers";
 
 function createFileSystem(ignoreCase: boolean, cwd: string, root: string) {
     return new vfs.FileSystem(ignoreCase, {
@@ -207,46 +209,46 @@ function createFileSystem(ignoreCase: boolean, cwd: string, root: string) {
                 "dev/tests/utils.ts": "",
                 "dev/tests/scenarios/first.json": "",
                 "dev/tests/baselines/first/output.ts": "",
-                    "dev/configs/extendsArrayFirst.json": JSON.stringify({
-                        compilerOptions: {
-                            allowJs: true,
-                            noImplicitAny: true,
-                            strictNullChecks: true
-                        }
-                    }),
-                    "dev/configs/extendsArraySecond.json": JSON.stringify({
-                        compilerOptions: {
-                            module: "amd"
-                        },
-                        include: ["../supplemental.*"]
-                    }),
-                    "dev/configs/extendsArrayThird.json": JSON.stringify({
-                        compilerOptions: {
-                            module: null, // eslint-disable-line no-null/no-null
-                            noImplicitAny: false
-                        },
-                        extends: "./extendsArrayFirst",
-                        include: ["../supplemental.*"]
-                    }),
-                    "dev/configs/extendsArrayFourth.json": JSON.stringify({
-                        compilerOptions: {
-                            module: "system",
-                            strictNullChecks: false
-                        },
-                        include: null, // eslint-disable-line no-null/no-null
-                        files: ["../main.ts"]
-                    }),
-                    "dev/configs/extendsArrayFifth.json": JSON.stringify({
-                        extends: ["./extendsArrayFirst", "./extendsArraySecond", "./extendsArrayThird", "./extendsArrayFourth"],
-                        files: [],
-                    }),
-                    "dev/extendsArrayFails.json": JSON.stringify({
-                        extends: ["./missingFile"],
-                        compilerOptions: {
-                            types: []
-                        }
-                    }),
-                    "dev/extendsArrayFails2.json": JSON.stringify({ extends: [42] }),
+                "dev/configs/extendsArrayFirst.json": JSON.stringify({
+                    compilerOptions: {
+                        allowJs: true,
+                        noImplicitAny: true,
+                        strictNullChecks: true
+                    }
+                }),
+                "dev/configs/extendsArraySecond.json": JSON.stringify({
+                    compilerOptions: {
+                        module: "amd"
+                    },
+                    include: ["../supplemental.*"]
+                }),
+                "dev/configs/extendsArrayThird.json": JSON.stringify({
+                    compilerOptions: {
+                        module: null, // eslint-disable-line no-null/no-null
+                        noImplicitAny: false
+                    },
+                    extends: "./extendsArrayFirst",
+                    include: ["../supplemental.*"]
+                }),
+                "dev/configs/extendsArrayFourth.json": JSON.stringify({
+                    compilerOptions: {
+                        module: "system",
+                        strictNullChecks: false
+                    },
+                    include: null, // eslint-disable-line no-null/no-null
+                    files: ["../main.ts"]
+                }),
+                "dev/configs/extendsArrayFifth.json": JSON.stringify({
+                    extends: ["./extendsArrayFirst", "./extendsArraySecond", "./extendsArrayThird", "./extendsArrayFourth"],
+                    files: [],
+                }),
+                "dev/extendsArrayFails.json": JSON.stringify({
+                    extends: ["./missingFile"],
+                    compilerOptions: {
+                        types: []
+                    }
+                }),
+                "dev/extendsArrayFails2.json": JSON.stringify({ extends: [42] }),
             }
         }
     });
@@ -258,205 +260,78 @@ const caseInsensitiveHost = new fakes.ParseConfigHost(createFileSystem(/*ignoreC
 const caseSensitiveBasePath = "/dev/";
 const caseSensitiveHost = new fakes.ParseConfigHost(createFileSystem(/*ignoreCase*/ false, caseSensitiveBasePath, "/"));
 
-function verifyDiagnostics(actual: ts.Diagnostic[], expected: { code: number; messageText: string; }[]) {
-    assert.isTrue(expected.length === actual.length, `Expected error: ${JSON.stringify(expected)}. Actual error: ${JSON.stringify(actual)}.`);
-    for (let i = 0; i < actual.length; i++) {
-        const actualError = actual[i];
-        const expectedError = expected[i];
-        assert.equal(actualError.code, expectedError.code, "Error code mismatch");
-        assert.equal(actualError.category, ts.DiagnosticCategory.Error, "Category mismatch"); // Should always be error
-        assert.equal(ts.flattenDiagnosticMessageText(actualError.messageText, "\n"), expectedError.messageText);
-    }
-}
-
 describe("unittests:: config:: configurationExtension", () => {
     ts.forEach<[string, string, fakes.ParseConfigHost], void>([
         ["under a case insensitive host", caseInsensitiveBasePath, caseInsensitiveHost],
         ["under a case sensitive host", caseSensitiveBasePath, caseSensitiveHost]
     ], ([testName, basePath, host]) => {
-        function getParseCommandLine(entry: string) {
-            const {config, error} = ts.readConfigFile(entry, name => host.readFile(name));
-            assert(config && !error, ts.flattenDiagnosticMessageText(error && error.messageText, "\n"));
-            return ts.parseJsonConfigFileContent(config, host, basePath, {}, entry);
+        const nameAndEntry: [name: string, entry: string][] = [];
+        function baselineParsedCommandLine(name: string, entry: string) {
+            nameAndEntry.push([name, entry]);
         }
 
-        function getParseCommandLineJsonSourceFile(entry: string) {
-            const jsonSourceFile = ts.readJsonConfigFile(entry, name => host.readFile(name));
-            assert(jsonSourceFile.endOfFileToken && !jsonSourceFile.parseDiagnostics.length, ts.flattenDiagnosticMessageText(jsonSourceFile.parseDiagnostics[0] && jsonSourceFile.parseDiagnostics[0].messageText, "\n"));
-            return {
-                jsonSourceFile,
-                parsed: ts.parseJsonSourceFileConfigFileContent(jsonSourceFile, host, basePath, {}, entry)
-            };
-        }
+        baselineParsedCommandLine("can resolve an extension with a base extension", "tsconfig.json");
+        baselineParsedCommandLine("can resolve an extension with a base extension that overrides options", "tsconfig.nostrictnull.json");
+        baselineParsedCommandLine("can report errors on circular imports", "circular.json");
+        baselineParsedCommandLine("can report missing configurations", "missing.json");
+        baselineParsedCommandLine("can report errors in extended configs", "failure.json");
+        baselineParsedCommandLine("can error when 'extends' is not a string or Array", "extends.json");
+        baselineParsedCommandLine("can error when 'extends' is given an empty string", "extends3.json");
+        baselineParsedCommandLine("can error when 'extends' is given an empty string in an array", "extends4.json");
+        baselineParsedCommandLine("can overwrite compiler options using extended 'null'", "configs/third.json");
+        baselineParsedCommandLine("can overwrite top-level options using extended 'null'", "configs/fourth.json");
+        baselineParsedCommandLine("can overwrite top-level files using extended []", "configs/fifth.json");
+        baselineParsedCommandLine("can lookup via tsconfig field", "tsconfig.extendsBox.json");
+        baselineParsedCommandLine("can lookup via package-relative path", "tsconfig.extendsStrict.json");
+        baselineParsedCommandLine("can lookup via non-redirected-to package-relative path", "tsconfig.extendsUnStrict.json");
+        baselineParsedCommandLine("can lookup via package-relative path with extension", "tsconfig.extendsStrictExtension.json");
+        baselineParsedCommandLine("can lookup via an implicit tsconfig", "tsconfig.extendsBoxImplied.json");
+        baselineParsedCommandLine("can lookup via an implicit tsconfig in a package-relative directory", "tsconfig.extendsBoxImpliedUnstrict.json");
+        baselineParsedCommandLine("can lookup via an implicit tsconfig in a package-relative directory with name", "tsconfig.extendsBoxImpliedUnstrictExtension.json");
+        baselineParsedCommandLine("can lookup via an implicit tsconfig in a package-relative directory with extension", "tsconfig.extendsBoxImpliedPath.json");
+        baselineParsedCommandLine("can lookup via an package.json exports", "tsconfig.extendsFoo.json");
 
-        function testSuccess(name: string, entry: string, expected: ts.CompilerOptions, expectedFiles: string[]) {
-            expected.configFilePath = entry;
-            it(name, () => {
-                const parsed = getParseCommandLine(entry);
-                assert(!parsed.errors.length, ts.flattenDiagnosticMessageText(parsed.errors[0] && parsed.errors[0].messageText, "\n"));
-                assert.deepEqual(parsed.options, expected);
-                assert.deepEqual(parsed.fileNames, expectedFiles);
-            });
+        baselineExtendsSourceFile("adds extendedSourceFiles only once", "configs/fourth.json");
+        baselineExtendsSourceFile("adds extendedSourceFiles from an array only once", "configs/extendsArrayFifth.json");
 
-            it(name + " with jsonSourceFile", () => {
-                const { parsed, jsonSourceFile } = getParseCommandLineJsonSourceFile(entry);
-                assert(!parsed.errors.length, ts.flattenDiagnosticMessageText(parsed.errors[0] && parsed.errors[0].messageText, "\n"));
-                assert.deepEqual(parsed.options, expected);
-                assert.equal(parsed.options.configFile, jsonSourceFile);
-                assert.deepEqual(parsed.fileNames, expectedFiles);
-            });
-        }
-
-        function testFailure(name: string, entry: string, expectedDiagnostics: { code: number; messageText: string; }[]) {
-            it(name, () => {
-                const parsed = getParseCommandLine(entry);
-                verifyDiagnostics(parsed.errors, expectedDiagnostics);
-            });
-
-            it(name + " with jsonSourceFile", () => {
-                const { parsed } = getParseCommandLineJsonSourceFile(entry);
-                verifyDiagnostics(parsed.errors, expectedDiagnostics);
-            });
-        }
-
-        describe(testName, () => {
-            testSuccess("can resolve an extension with a base extension", "tsconfig.json", {
-                allowJs: true,
-                noImplicitAny: true,
-                strictNullChecks: true,
-            }, [
-                ts.combinePaths(basePath, "main.ts"),
-                ts.combinePaths(basePath, "supplemental.ts"),
-            ]);
-
-            testSuccess("can resolve an extension with a base extension that overrides options", "tsconfig.nostrictnull.json", {
-                allowJs: true,
-                noImplicitAny: true,
-                strictNullChecks: false,
-            }, [
-                ts.combinePaths(basePath, "main.ts"),
-                ts.combinePaths(basePath, "supplemental.ts"),
-            ]);
-
-            testFailure("can report errors on circular imports", "circular.json", [
-                {
-                    code: 18000,
-                    messageText: `Circularity detected while resolving configuration: ${[ts.combinePaths(basePath, "circular.json"), ts.combinePaths(basePath, "circular2.json"), ts.combinePaths(basePath, "circular.json")].join(" -> ")}`
-                }
-            ]);
-
-            testFailure("can report missing configurations", "missing.json", [{
-                code: 6053,
-                messageText: `File './missing2' not found.`
-            }]);
-
-            testFailure("can report errors in extended configs", "failure.json", [{
-                code: 6114,
-                messageText: `Unknown option 'excludes'. Did you mean 'exclude'?`
-            }]);
-
-            testFailure("can error when 'extends' is not a string or Array", "extends.json", [{
-                code: 5024,
-                messageText: `Compiler option 'extends' requires a value of type string or Array.`
-            }]);
-
-            testFailure("can error when 'extends' is given an empty string", "extends3.json", [{
-                code: 18051,
-                messageText: `Compiler option 'extends' cannot be given an empty string.`
-            }]);
+        baselineParsedCommandLine("can overwrite top-level compilerOptions", "configs/extendsArrayFifth.json");
+        baselineParsedCommandLine("can report missing configurations", "extendsArrayFails.json");
+        baselineParsedCommandLine("can error when 'extends' is not a string or Array2", "extendsArrayFails2.json");
 
-            testFailure("can error when 'extends' is given an empty string in an array", "extends4.json", [{
-                code: 18051,
-                messageText: `Compiler option 'extends' cannot be given an empty string.`
-            }]);
-
-            testSuccess("can overwrite compiler options using extended 'null'", "configs/third.json", {
-                allowJs: true,
-                noImplicitAny: true,
-                strictNullChecks: true,
-                module: undefined // Technically, this is distinct from the key never being set; but within the compiler we don't make the distinction
-            }, [
-                ts.combinePaths(basePath, "supplemental.ts")
-            ]);
-
-            testSuccess("can overwrite top-level options using extended 'null'", "configs/fourth.json", {
-                allowJs: true,
-                noImplicitAny: true,
-                strictNullChecks: true,
-                module: ts.ModuleKind.System
-            }, [
-                ts.combinePaths(basePath, "main.ts")
-            ]);
-
-            testSuccess("can overwrite top-level files using extended []", "configs/fifth.json", {
-                allowJs: true,
-                noImplicitAny: true,
-                strictNullChecks: true,
-                module: ts.ModuleKind.System
-            }, [
-                ts.combinePaths(basePath, "tests/utils.ts")
-            ]);
-
-            describe("finding extended configs from node_modules", () => {
-                testSuccess("can lookup via tsconfig field", "tsconfig.extendsBox.json", { strict: true }, [ts.combinePaths(basePath, "main.ts")]);
-                testSuccess("can lookup via package-relative path", "tsconfig.extendsStrict.json", { strict: true }, [ts.combinePaths(basePath, "main.ts")]);
-                testSuccess("can lookup via non-redirected-to package-relative path", "tsconfig.extendsUnStrict.json", { strict: false }, [ts.combinePaths(basePath, "main.ts")]);
-                testSuccess("can lookup via package-relative path with extension", "tsconfig.extendsStrictExtension.json", { strict: true }, [ts.combinePaths(basePath, "main.ts")]);
-                testSuccess("can lookup via an implicit tsconfig", "tsconfig.extendsBoxImplied.json", { strict: true }, [ts.combinePaths(basePath, "main.ts")]);
-                testSuccess("can lookup via an implicit tsconfig in a package-relative directory", "tsconfig.extendsBoxImpliedUnstrict.json", { strict: false }, [ts.combinePaths(basePath, "main.ts")]);
-                testSuccess("can lookup via an implicit tsconfig in a package-relative directory with name", "tsconfig.extendsBoxImpliedUnstrictExtension.json", { strict: false }, [ts.combinePaths(basePath, "main.ts")]);
-                testSuccess("can lookup via an implicit tsconfig in a package-relative directory with extension", "tsconfig.extendsBoxImpliedPath.json", { strict: true }, [ts.combinePaths(basePath, "main.ts")]);
-                testSuccess("can lookup via an package.json exports", "tsconfig.extendsFoo.json", { strict: true }, [ts.combinePaths(basePath, "main.ts")]);
-            });
-
-            it("adds extendedSourceFiles only once", () => {
-                const sourceFile = ts.readJsonConfigFile("configs/fourth.json", (path) => host.readFile(path));
-                const dir = ts.combinePaths(basePath, "configs");
-                const expected = [
-                    ts.combinePaths(dir, "third.json"),
-                    ts.combinePaths(dir, "second.json"),
-                    ts.combinePaths(dir, "base.json"),
-                ];
-                ts.parseJsonSourceFileConfigFileContent(sourceFile, host, dir, {}, "fourth.json");
-                assert.deepEqual(sourceFile.extendedSourceFiles, expected);
-                ts.parseJsonSourceFileConfigFileContent(sourceFile, host, dir, {}, "fourth.json");
-                assert.deepEqual(sourceFile.extendedSourceFiles, expected);
-            });
+        baselineParseConfig({
+            scenario: "configurationExtension",
+            subScenario: testName,
+            input: () => nameAndEntry.map(([name, entry]) => ({
+                createHost: baseline => {
+                    baseline.push(name);
+                    return host;
+                },
+                jsonText: host.readFile(entry)!,
+                configFileName: entry,
+                baselineParsed: (baseline, parsed) => {
+                    baseline.push("CompilerOptions::");
+                    baseline.push(JSON.stringify(parsed.options, undefined, " "));
+                    baseline.push("FileNames::");
+                    baseline.push(parsed.fileNames.join());
+                },
+            })),
+            skipFs: true,
+            header: baseline => baselineParseConfigHost(baseline, host),
         });
 
-        describe(testName, () => {
-            it("adds extendedSourceFiles from an array only once", () => {
-                const sourceFile = ts.readJsonConfigFile("configs/extendsArrayFifth.json", (path) => host.readFile(path));
+        function baselineExtendsSourceFile(name: string, entry: string) {
+            it(name, () => {
+                const baseline: string[] = [];
+                baselineParseConfigHost(baseline, host);
+                baseline.push(`configFileName:: ${name}`);
+                const sourceFile = ts.readJsonConfigFile(entry, (path) => host.readFile(path));
                 const dir = ts.combinePaths(basePath, "configs");
-                const expected = [
-                    ts.combinePaths(dir, "extendsArrayFirst.json"),
-                    ts.combinePaths(dir, "extendsArraySecond.json"),
-                    ts.combinePaths(dir, "extendsArrayThird.json"),
-                    ts.combinePaths(dir, "extendsArrayFourth.json"),
-                ];
-                ts.parseJsonSourceFileConfigFileContent(sourceFile, host, dir, {}, "extendsArrayFifth.json");
-                assert.deepEqual(sourceFile.extendedSourceFiles, expected);
-                ts.parseJsonSourceFileConfigFileContent(sourceFile, host, dir, {}, "extendsArrayFifth.json");
-                assert.deepEqual(sourceFile.extendedSourceFiles, expected);
+                ts.parseJsonSourceFileConfigFileContent(sourceFile, host, dir, {}, ts.getBaseFileName(entry));
+                baseline.push("ExtendedSourceFiles::", ...sourceFile.extendedSourceFiles!);
+                ts.parseJsonSourceFileConfigFileContent(sourceFile, host, dir, {}, ts.getBaseFileName(entry));
+                baseline.push("After reusing sourceFile ExtendedSourceFiles::", ...sourceFile.extendedSourceFiles!);
+                Harness.Baseline.runBaseline(`config/configurationExtension/${name} ${testName}.js`, baseline.join("\n"));
             });
-
-            testSuccess("can overwrite top-level compilerOptions", "configs/extendsArrayFifth.json", {
-                allowJs: true,
-                noImplicitAny: false,
-                strictNullChecks: false,
-                module: ts.ModuleKind.System
-            }, []);
-
-            testFailure("can report missing configurations", "extendsArrayFails.json", [{
-                code: 6053,
-                messageText: `File './missingFile' not found.`
-            }]);
-
-            testFailure("can error when 'extends' is not a string or Array2", "extendsArrayFails2.json", [{
-                code: 5024,
-                messageText: `Compiler option 'extends' requires a value of type string.`
-            }]);
-        });
+        }
     });
 });
-
diff --git a/src/testRunner/unittests/config/convertCompilerOptionsFromJson.ts b/src/testRunner/unittests/config/convertCompilerOptionsFromJson.ts
index 1a994f0384ad3..d636d07c4e449 100644
--- a/src/testRunner/unittests/config/convertCompilerOptionsFromJson.ts
+++ b/src/testRunner/unittests/config/convertCompilerOptionsFromJson.ts
@@ -1,646 +1,228 @@
 import * as fakes from "../../_namespaces/fakes";
-import * as ts from "../../_namespaces/ts";
 import * as vfs from "../../_namespaces/vfs";
+import { baselineParseConfig } from "./helpers";
 
 describe("unittests:: config:: convertCompilerOptionsFromJson", () => {
-    const formatDiagnosticHost: ts.FormatDiagnosticsHost = {
-        getCurrentDirectory: () => "/apath/",
-        getCanonicalFileName: ts.createGetCanonicalFileName(/*useCaseSensitiveFileNames*/ true),
-        getNewLine: () => "\n"
-    };
-
-    interface ExpectedResultWithParsingSuccess {
-        compilerOptions: ts.CompilerOptions;
-        errors: readonly ts.Diagnostic[];
-    }
-
-    interface ExpectedResultWithParsingFailure {
-        compilerOptions: ts.CompilerOptions;
-        hasParseErrors: true;
+    function baselineCompilerOptions(subScenario: string, json: any, configFileName: string) {
+        baselineCompilerOptionsJsonText(
+            subScenario,
+            JSON.stringify(json, undefined, " "),
+            configFileName,
+            /*skipJson*/ false,
+        );
     }
 
-    type ExpectedResult = ExpectedResultWithParsingSuccess | ExpectedResultWithParsingFailure;
-
-    function isExpectedResultWithParsingFailure(expectedResult: ExpectedResult): expectedResult is ExpectedResultWithParsingFailure {
-        return !!(expectedResult as ExpectedResultWithParsingFailure).hasParseErrors;
+    function baselineCompilerOptionsJsonText(subScenario: string, jsonText: string, configFileName: string, skipJson = true) {
+        baselineParseConfig({
+            scenario: "convertCompilerOptionsFromJson",
+            subScenario,
+            input: () => [{
+                createHost: () => new fakes.ParseConfigHost(new vfs.FileSystem(
+                    /*ignoreCase*/ false,
+                    {
+                        cwd: "/apath/",
+                        files: {
+                            [`/apath/${configFileName}`]: jsonText,
+                            "/apath/a.ts": "",
+                            "/apath/b.js": "",
+                        }
+                    },
+                )),
+                jsonText,
+                configFileName,
+                basePath: "/apath",
+                baselineParsed: (baseline, parsed) => baseline.push("CompilerOptions::", JSON.stringify(parsed.options, undefined, " ")),
+            }],
+            skipJson,
+        });
     }
 
-    function assertCompilerOptions(json: any, configFileName: string, expectedResult: ExpectedResultWithParsingSuccess) {
-        assertCompilerOptionsWithJson(json, configFileName, expectedResult);
-        assertCompilerOptionsWithJsonNode(json, configFileName, expectedResult);
-    }
+    // tsconfig.json tests
+    baselineCompilerOptions("Convert correctly format tsconfig.json to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            lib: ["es5", "es2015.core", "es2015.symbol"]
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert correctly format tsconfig.json with allowJs is false to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            allowJs: false,
+            lib: ["es5", "es2015.core", "es2015.symbol"]
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert incorrect option of jsx to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            jsx: ""
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert incorrect option of module to compiler-options", {
+        compilerOptions: {
+            module: "",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert incorrect option of newLine to compiler-options", {
+        compilerOptions: {
+            newLine: "",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+        }
+    }, "tsconfig.json");
 
-    function assertCompilerOptionsWithJson(json: any, configFileName: string, expectedResult: ExpectedResultWithParsingSuccess) {
-        const { options: actualCompilerOptions, errors: actualErrors } = ts.convertCompilerOptionsFromJson(json.compilerOptions, "/apath/", configFileName);
+    baselineCompilerOptions("Convert incorrect option of target to compiler-options", {
+        compilerOptions: {
+            target: "",
+            noImplicitAny: false,
+            sourceMap: false,
+        }
+    }, "tsconfig.json");
 
-        const parsedCompilerOptions = JSON.stringify(actualCompilerOptions);
-        const expectedCompilerOptions = JSON.stringify({ ...expectedResult.compilerOptions, configFilePath: configFileName });
-        assert.equal(parsedCompilerOptions, expectedCompilerOptions);
+    baselineCompilerOptions("Convert incorrect option of module-resolution to compiler-options", {
+        compilerOptions: {
+            moduleResolution: "",
+            noImplicitAny: false,
+            sourceMap: false,
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert incorrect option of libs to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            lib: ["es5", "es2015.core", "incorrectLib"]
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert empty string option of libs to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            lib: ["es5", ""]
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert empty string option of libs array to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            lib: [""]
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert trailing-whitespace string option of libs to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            lib: ["   "]
+        }
+    }, "tsconfig.json");
+
+    baselineCompilerOptions("Convert empty option of libs to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            lib: []
+        }
+    }, "tsconfig.json");
 
-        verifyErrors(actualErrors, expectedResult.errors, /*ignoreLocation*/ true);
-    }
+    baselineCompilerOptions("Convert empty string option of moduleSuffixes to compiler-options", {
+        compilerOptions: {
+            moduleSuffixes: [".ios", ""]
+        }
+    }, "tsconfig.json");
 
-    function assertCompilerOptionsWithJsonNode(json: any, configFileName: string, expectedResult: ExpectedResultWithParsingSuccess) {
-        assertCompilerOptionsWithJsonText(JSON.stringify(json), configFileName, expectedResult);
-    }
+    baselineCompilerOptions("Convert empty string option of moduleSuffixes single to compiler-options", {
+        compilerOptions: {
+            moduleSuffixes: [""]
+        }
+    }, "tsconfig.json");
 
-    function assertCompilerOptionsWithJsonText(fileText: string, configFileName: string, expectedResult: ExpectedResult) {
-        const result = ts.parseJsonText(configFileName, fileText);
-        assert(!!result.endOfFileToken);
-        assert.equal(!!result.parseDiagnostics.length, isExpectedResultWithParsingFailure(expectedResult));
-        const host: ts.ParseConfigHost = new fakes.ParseConfigHost(new vfs.FileSystem(/*ignoreCase*/ false, { cwd: "/apath/" }));
-        const { options: actualCompilerOptions, errors: actualParseErrors } = ts.parseJsonSourceFileConfigFileContent(result, host, "/apath/", /*existingOptions*/ undefined, configFileName);
-        expectedResult.compilerOptions.configFilePath = configFileName;
-
-        const parsedCompilerOptions = JSON.stringify(actualCompilerOptions);
-        const expectedCompilerOptions = JSON.stringify(expectedResult.compilerOptions);
-        assert.equal(parsedCompilerOptions, expectedCompilerOptions);
-        assert.equal(actualCompilerOptions.configFile, result);
-
-        if (!isExpectedResultWithParsingFailure(expectedResult)) {
-            verifyErrors(actualParseErrors.filter(error => error.code !== ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code), expectedResult.errors);
+    baselineCompilerOptions("Convert trailing-whitespace string option of moduleSuffixes to compiler-options", {
+        compilerOptions: {
+            moduleSuffixes: ["   "]
         }
-    }
+    }, "tsconfig.json");
 
-    function verifyErrors(actualErrors: ts.Diagnostic[], expectedErrors: readonly ts.Diagnostic[], ignoreLocation?: boolean) {
-        assert.isTrue(expectedErrors.length === actualErrors.length, `Expected error: ${JSON.stringify(expectedErrors.map(getDiagnosticString), undefined, " ")}. Actual error: ${JSON.stringify(actualErrors.map(getDiagnosticString), undefined, " ")}.`);
-        for (let i = 0; i < actualErrors.length; i++) {
-            const actualError = actualErrors[i];
-            const expectedError = expectedErrors[i];
-
-            assert.equal(actualError.code, expectedError.code, `Expected error-code: ${JSON.stringify(expectedError.code)}. Actual error-code: ${JSON.stringify(actualError.code)}.`);
-            assert.equal(actualError.category, expectedError.category, `Expected error-category: ${JSON.stringify(expectedError.category)}. Actual error-category: ${JSON.stringify(actualError.category)}.`);
-            if (!ignoreLocation) {
-                assert(actualError.file);
-                assert.isDefined(actualError.start);
-                assert(actualError.length);
-            }
+    baselineCompilerOptions("Convert empty option of moduleSuffixes to compiler-options", {
+        compilerOptions: {
+            moduleSuffixes: []
         }
+    }, "tsconfig.json");
 
-        function getDiagnosticString(diagnostic: ts.Diagnostic) {
-            if (ignoreLocation) {
-                const { file, ...rest } = diagnostic;
-                diagnostic = { file: undefined, ...rest };
-            }
-            return ts.formatDiagnostic(diagnostic, formatDiagnosticHost);
+    baselineCompilerOptions("Convert incorrectly format tsconfig.json to compiler-options", {
+        compilerOptions: {
+            modu: "commonjs",
         }
-    }
+    }, "tsconfig.json");
 
-    // tsconfig.json tests
-    it("Convert correctly format tsconfig.json to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["es5", "es2015.core", "es2015.symbol"]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["lib.es5.d.ts", "lib.es2015.core.d.ts", "lib.es2015.symbol.d.ts"]
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert correctly format tsconfig.json with allowJs is false to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    allowJs: false,
-                    lib: ["es5", "es2015.core", "es2015.symbol"]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    allowJs: false,
-                    lib: ["lib.es5.d.ts", "lib.es2015.core.d.ts", "lib.es2015.symbol.d.ts"]
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert incorrect option of jsx to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    jsx: ""
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--jsx' option must be: 'preserve', 'react-native', 'react'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert incorrect option of module to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert incorrect option of newLine to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    newLine: "",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--newLine' option must be: 'crlf', 'lf'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert incorrect option of target to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    target: "",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    noImplicitAny: false,
-                    sourceMap: false,
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--target' option must be: 'es3', 'es5', 'es6', 'es2015', 'es2016', 'es2017', 'es2018', 'es2019', 'esnext'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert incorrect option of module-resolution to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    moduleResolution: "",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    noImplicitAny: false,
-                    sourceMap: false,
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--moduleResolution' option must be: 'node', 'classic'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert incorrect option of libs to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["es5", "es2015.core", "incorrectLib"]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["lib.es5.d.ts", "lib.es2015.core.d.ts"]
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.intl', 'esnext.bigint', 'esnext.bigint', 'esnext.string', 'esnext.promise'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert empty string option of libs to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["es5", ""]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["lib.es5.d.ts"]
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert empty string option of libs to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: [""]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: []
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert trailing-whitespace string option of libs to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["   "]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: []
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise'.",
-                    code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
-                    category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category
-                }]
-            }
-        );
-    });
-
-    it("Convert empty option of libs to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: []
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: []
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert empty string option of moduleSuffixes to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    moduleSuffixes: [".ios", ""]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    moduleSuffixes: [".ios", ""]
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert empty string option of moduleSuffixes to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    moduleSuffixes: [""]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    moduleSuffixes: [""]
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert trailing-whitespace string option of moduleSuffixes to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    moduleSuffixes: ["   "]
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    moduleSuffixes: ["   "]
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert empty option of moduleSuffixes to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    moduleSuffixes: []
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    moduleSuffixes: []
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert incorrectly format tsconfig.json to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    modu: "commonjs",
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {},
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Unknown compiler option 'modu'.",
-                    code: ts.Diagnostics.Unknown_compiler_option_0.code,
-                    category: ts.Diagnostics.Unknown_compiler_option_0.category
-                }]
-            }
-        );
-    });
+    baselineCompilerOptions("Convert default tsconfig.json to compiler-options", {}, "tsconfig.json");
 
-    it("Convert default tsconfig.json to compiler-options ", () => {
-        assertCompilerOptions({}, "tsconfig.json",
-            {
-                compilerOptions: {},
-                errors: []
-            }
-        );
-    });
-
-    it("Convert negative numbers in tsconfig.json ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    allowJs: true,
-                    maxNodeModuleJsDepth: -1
-                }
-            }, "tsconfig.json",
-            {
-                compilerOptions: {
-                    allowJs: true,
-                    maxNodeModuleJsDepth: -1
-                },
-                errors: []
-            }
-        );
-    });
+    baselineCompilerOptions("Convert negative numbers in tsconfig.json", {
+        compilerOptions: {
+            allowJs: true,
+            maxNodeModuleJsDepth: -1
+        }
+    }, "tsconfig.json");
 
     // jsconfig.json
-    it("Convert correctly format jsconfig.json to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["es5", "es2015.core", "es2015.symbol"]
-                }
-            }, "jsconfig.json",
-            {
-                compilerOptions: {
-                    allowJs: true,
-                    maxNodeModuleJsDepth: 2,
-                    allowSyntheticDefaultImports: true,
-                    skipLibCheck: true,
-                    noEmit: true,
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["lib.es5.d.ts", "lib.es2015.core.d.ts", "lib.es2015.symbol.d.ts"]
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert correctly format jsconfig.json with allowJs is false to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    module: "commonjs",
-                    target: "es5",
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    allowJs: false,
-                    lib: ["es5", "es2015.core", "es2015.symbol"]
-                }
-            }, "jsconfig.json",
-            {
-                compilerOptions: {
-                    allowJs: false,
-                    maxNodeModuleJsDepth: 2,
-                    allowSyntheticDefaultImports: true,
-                    skipLibCheck: true,
-                    noEmit: true,
-                    module: ts.ModuleKind.CommonJS,
-                    target: ts.ScriptTarget.ES5,
-                    noImplicitAny: false,
-                    sourceMap: false,
-                    lib: ["lib.es5.d.ts", "lib.es2015.core.d.ts", "lib.es2015.symbol.d.ts"]
-                },
-                errors: []
-            }
-        );
-    });
-
-    it("Convert incorrectly format jsconfig.json to compiler-options ", () => {
-        assertCompilerOptions(
-            {
-                compilerOptions: {
-                    modu: "commonjs",
-                }
-            }, "jsconfig.json",
-            {
-                compilerOptions:
-                {
-                    allowJs: true,
-                    maxNodeModuleJsDepth: 2,
-                    allowSyntheticDefaultImports: true,
-                    skipLibCheck: true,
-                    noEmit: true
-                },
-                errors: [{
-                    file: undefined,
-                    start: 0,
-                    length: 0,
-                    messageText: "Unknown compiler option 'modu'.",
-                    code: ts.Diagnostics.Unknown_compiler_option_0.code,
-                    category: ts.Diagnostics.Unknown_compiler_option_0.category
-                }]
-            }
-        );
-    });
-
-    it("Convert default jsconfig.json to compiler-options ", () => {
-        assertCompilerOptions({}, "jsconfig.json",
-            {
-                compilerOptions:
-                {
-                    allowJs: true,
-                    maxNodeModuleJsDepth: 2,
-                    allowSyntheticDefaultImports: true,
-                    skipLibCheck: true,
-                    noEmit: true
-                },
-                errors: []
-            }
-        );
-    });
+    baselineCompilerOptions("Convert correctly format jsconfig.json to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            lib: ["es5", "es2015.core", "es2015.symbol"]
+        }
+    }, "jsconfig.json");
+
+    baselineCompilerOptions("Convert correctly format jsconfig.json with allowJs is false to compiler-options", {
+        compilerOptions: {
+            module: "commonjs",
+            target: "es5",
+            noImplicitAny: false,
+            sourceMap: false,
+            allowJs: false,
+            lib: ["es5", "es2015.core", "es2015.symbol"]
+        }
+    }, "jsconfig.json");
+
+    baselineCompilerOptions("Convert incorrectly format jsconfig.json to compiler-options", {
+        compilerOptions: {
+            modu: "commonjs",
+        }
+    }, "jsconfig.json");
+
+    baselineCompilerOptions("Convert default jsconfig.json to compiler-options", {}, "jsconfig.json");
 
-    it("Convert tsconfig options when there are multiple invalid strings", () => {
-        assertCompilerOptionsWithJsonText(`{
+    baselineCompilerOptionsJsonText("Convert tsconfig options when there are multiple invalid strings", `{
   "compilerOptions": {
     "target": "<%- options.useTsWithBabel ? 'esnext' : 'es5' %>",
     "module": "esnext",
@@ -660,122 +242,43 @@ describe("unittests:: config:: convertCompilerOptionsFromJson", () => {
   }
 }
 `,
-        "tsconfig.json",
-        {
-            compilerOptions: {
-                target: undefined,
-                module: ts.ModuleKind.ESNext,
-                experimentalDecorators: true,
-            },
-            hasParseErrors: true
-        });
-    });
-
-    it("Convert a tsconfig file with stray trailing characters", () => {
-        assertCompilerOptionsWithJsonText(`{
-                "compilerOptions": {
-                    "target": "esnext"
-                }
-            } blah`, "tsconfig.json", {
-            compilerOptions: {
-                target: ts.ScriptTarget.ESNext
-            },
-            hasParseErrors: true,
-            errors: [{
-                ...ts.Diagnostics.The_root_value_of_a_0_file_must_be_an_object,
-                messageText: "The root value of a 'tsconfig.json' file must be an object.",
-                file: undefined,
-                start: 0,
-                length: 0
-            }]
-        });
-    });
-
-    it("Convert a tsconfig file with stray leading characters", () => {
-        assertCompilerOptionsWithJsonText(`blah {
-                "compilerOptions": {
-                    "target": "esnext"
-                }
-            }`, "tsconfig.json", {
-            compilerOptions: {
-                target: ts.ScriptTarget.ESNext
-            },
-            hasParseErrors: true,
-            errors: [{
-                ...ts.Diagnostics.The_root_value_of_a_0_file_must_be_an_object,
-                messageText: "The root value of a 'tsconfig.json' file must be an object.",
-                file: undefined,
-                start: 0,
-                length: 0
-            }]
-        });
-    });
-
-    it("Convert a tsconfig file as an array", () => {
-        assertCompilerOptionsWithJsonText(`[{
-                "compilerOptions": {
-                    "target": "esnext"
-                }
-            }]`, "tsconfig.json", {
-            compilerOptions: {
-                target: ts.ScriptTarget.ESNext
-            },
-            errors: [{
-                ...ts.Diagnostics.The_root_value_of_a_0_file_must_be_an_object,
-                messageText: "The root value of a 'tsconfig.json' file must be an object.",
-                file: undefined,
-                start: 0,
-                length: 0
-            }]
-        });
-    });
-
-    it("raises an error if you've set a compiler flag in the root without including 'compilerOptions'", () => {
-        assertCompilerOptionsWithJsonText(`{
-                "module": "esnext",
-            }`, "tsconfig.json", {
-            compilerOptions: {},
-            errors: [{
-                ...ts.Diagnostics._0_should_be_set_inside_the_compilerOptions_object_of_the_config_json_file,
-                messageText: "'module' should be set inside the 'compilerOptions' object of the config json file.",
-                file: undefined,
-                start: 0,
-                length: 0
-            }]
-        });
-    });
-
-    it("does not raise an error if you've set a compiler flag in the root when you have included 'compilerOptions'", () => {
-        assertCompilerOptionsWithJsonText(`{
-                "target": "esnext",
-                "compilerOptions": {
-                    "module": "esnext"
-                }
-            }`, "tsconfig.json", {
-            compilerOptions: {
-                module: ts.ModuleKind.ESNext
-            },
-            errors: []
-        });
-    });
-
-    it("Don't crash when root expression is not object at all", () => {
-        assertCompilerOptionsWithJsonText(`42`, "tsconfig.json", {
-            compilerOptions: {},
-            errors: [{
-                ...ts.Diagnostics.The_root_value_of_a_0_file_must_be_an_object,
-                messageText: "The root value of a 'tsconfig.json' file must be an object.",
-                file: undefined,
-                start: 0,
-                length: 0
-            }]
-        });
-    });
+        "tsconfig.json");
 
-    it("Allow trailing comments", () => {
-        assertCompilerOptionsWithJsonText(`{} // no options`, "tsconfig.json", {
-            compilerOptions: {},
-            errors: []
-        });
-    });
+    baselineCompilerOptionsJsonText("Convert a tsconfig file with stray trailing characters",
+        `{
+            "compilerOptions": {
+                "target": "esnext"
+            }
+        } blah`, "tsconfig.json");
+
+    baselineCompilerOptionsJsonText("Convert a tsconfig file with stray leading characters",
+        `blah {
+            "compilerOptions": {
+                "target": "esnext"
+            }
+        }`, "tsconfig.json");
+
+    baselineCompilerOptionsJsonText("Convert a tsconfig file as an array",
+        `[{
+            "compilerOptions": {
+                "target": "esnext"
+            }
+        }]`, "tsconfig.json");
+
+    baselineCompilerOptionsJsonText("raises an error if you've set a compiler flag in the root without including compilerOptions",
+        `{
+            "module": "esnext",
+        }`, "tsconfig.json");
+
+    baselineCompilerOptionsJsonText("does not raise an error if you've set a compiler flag in the root when you have included 'compilerOptions'",
+        `{
+            "target": "esnext",
+            "compilerOptions": {
+                "module": "esnext"
+            }
+        }`, "tsconfig.json");
+
+    baselineCompilerOptionsJsonText("Don't crash when root expression is not object at all", `42`, "tsconfig.json");
+
+    baselineCompilerOptionsJsonText("Allow trailing comments", `{} // no options`, "tsconfig.json");
 });
diff --git a/src/testRunner/unittests/config/convertTypeAcquisitionFromJson.ts b/src/testRunner/unittests/config/convertTypeAcquisitionFromJson.ts
index 8fa6758774b80..f506eab089061 100644
--- a/src/testRunner/unittests/config/convertTypeAcquisitionFromJson.ts
+++ b/src/testRunner/unittests/config/convertTypeAcquisitionFromJson.ts
@@ -1,217 +1,96 @@
 import * as fakes from "../../_namespaces/fakes";
-import * as ts from "../../_namespaces/ts";
 import * as vfs from "../../_namespaces/vfs";
+import { baselineParseConfig } from "./helpers";
 
-interface ExpectedResult { typeAcquisition: ts.TypeAcquisition; errors: ts.Diagnostic[]; }
 describe("unittests:: config:: convertTypeAcquisitionFromJson", () => {
-    function assertTypeAcquisition(json: any, configFileName: string, expectedResult: ExpectedResult) {
-        assertTypeAcquisitionWithJson(json, configFileName, expectedResult);
-        assertTypeAcquisitionWithJsonNode(json, configFileName, expectedResult);
-    }
-
-    function verifyAcquisition(actualTypeAcquisition: ts.TypeAcquisition | undefined, expectedResult: ExpectedResult) {
-        const parsedTypeAcquisition = JSON.stringify(actualTypeAcquisition);
-        const expectedTypeAcquisition = JSON.stringify(expectedResult.typeAcquisition);
-        assert.equal(parsedTypeAcquisition, expectedTypeAcquisition);
-    }
-
-    function verifyErrors(actualErrors: ts.Diagnostic[], expectedResult: ExpectedResult, hasLocation?: boolean) {
-        const expectedErrors = expectedResult.errors;
-        assert.isTrue(expectedResult.errors.length === actualErrors.length, `Expected error: ${JSON.stringify(expectedResult.errors)}. Actual error: ${JSON.stringify(actualErrors)}.`);
-        for (let i = 0; i < actualErrors.length; i++) {
-            const actualError = actualErrors[i];
-            const expectedError = expectedErrors[i];
-            assert.equal(actualError.code, expectedError.code, `Expected error-code: ${JSON.stringify(expectedError.code)}. Actual error-code: ${JSON.stringify(actualError.code)}.`);
-            assert.equal(actualError.category, expectedError.category, `Expected error-category: ${JSON.stringify(expectedError.category)}. Actual error-category: ${JSON.stringify(actualError.category)}.`);
-            if (hasLocation) {
-                assert(actualError.file);
-                assert(actualError.start);
-                assert(actualError.length);
-            }
-        }
-    }
-
-    function assertTypeAcquisitionWithJson(json: any, configFileName: string, expectedResult: ExpectedResult) {
-        const jsonOptions = json.typeAcquisition;
-        const { options: actualTypeAcquisition, errors: actualErrors } = ts.convertTypeAcquisitionFromJson(jsonOptions, "/apath/", configFileName);
-        verifyAcquisition(actualTypeAcquisition, expectedResult);
-        verifyErrors(actualErrors, expectedResult);
-    }
-
-    function assertTypeAcquisitionWithJsonNode(json: any, configFileName: string, expectedResult: ExpectedResult) {
-        const fileText = JSON.stringify(json);
-        const result = ts.parseJsonText(configFileName, fileText);
-        assert(!result.parseDiagnostics.length);
-        assert(!!result.endOfFileToken);
-        const host: ts.ParseConfigHost = new fakes.ParseConfigHost(new vfs.FileSystem(/*ignoreCase*/ false, { cwd: "/apath/" }));
-        const { typeAcquisition: actualTypeAcquisition, errors: actualParseErrors } = ts.parseJsonSourceFileConfigFileContent(result, host, "/apath/", /*existingOptions*/ undefined, configFileName);
-        verifyAcquisition(actualTypeAcquisition, expectedResult);
-
-        const actualErrors = ts.filter(actualParseErrors, error => error.code !== ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code);
-        verifyErrors(actualErrors, expectedResult, /*hasLocation*/ true);
+    function baselineTypeAcquisition(subScenario: string, json: any, configFileName: string) {
+        baselineParseConfig({
+            scenario: "convertTypeAcquisitionFromJson",
+            subScenario,
+            input: () => {
+                const jsonText = JSON.stringify(json, undefined, " ");
+                return [{
+                    createHost: () => new fakes.ParseConfigHost(new vfs.FileSystem(
+                        /*ignoreCase*/ false,
+                        {
+                            cwd: "/apath/",
+                            files: {
+                                [`/apath/${configFileName}`]: jsonText,
+                                "/apath/a.ts": "",
+                                "/apath/b.js": "",
+                            }
+                        },
+                    )),
+                    jsonText,
+                    configFileName,
+                    basePath: "/apath",
+                    baselineParsed: (baseline, parsed) => baseline.push("TypeAcquisition::", JSON.stringify(parsed.typeAcquisition, undefined, " ")),
+                }];
+            },
+        });
     }
 
-    it("Convert correctly format tsconfig.json to typeAcquisition ", () => {
-        assertTypeAcquisition(
-            {
-                typeAcquisition:
-                {
-                    enable: true,
-                    include: ["0.d.ts", "1.d.ts"],
-                    exclude: ["0.js", "1.js"]
-                }
-            },
-            "tsconfig.json",
+    baselineTypeAcquisition("Convert correctly format tsconfig.json to typeAcquisition ",
+        {
+            typeAcquisition:
             {
-                typeAcquisition:
-                {
-                    enable: true,
-                    include: ["0.d.ts", "1.d.ts"],
-                    exclude: ["0.js", "1.js"]
-                },
-                errors: [] as ts.Diagnostic[]
-            });
-    });
+                enable: true,
+                include: ["0.d.ts", "1.d.ts"],
+                exclude: ["0.js", "1.js"]
+            }
+        },
+        "tsconfig.json"
+    );
 
-    it("Convert incorrect format tsconfig.json to typeAcquisition ", () => {
-        assertTypeAcquisition(
-            {
-                typeAcquisition:
-                {
-                    enableAutoDiscovy: true,
-                }
-            }, "tsconfig.json",
+    baselineTypeAcquisition("Convert incorrect format tsconfig.json to typeAcquisition ",
+        {
+            typeAcquisition:
             {
-                typeAcquisition:
-                {
-                    enable: false,
-                    include: [],
-                    exclude: []
-                },
-                errors: [
-                    {
-                        category: ts.Diagnostics.Unknown_type_acquisition_option_0.category,
-                        code: ts.Diagnostics.Unknown_type_acquisition_option_0.code,
-                        file: undefined,
-                        start: 0,
-                        length: 0,
-                        messageText: undefined!, // TODO: GH#18217
-                    }
-                ]
-            });
-    });
+                enableAutoDiscovy: true,
+            }
+        }, "tsconfig.json",
+    );
 
-    it("Convert default tsconfig.json to typeAcquisition ", () => {
-        assertTypeAcquisition({}, "tsconfig.json",
-            {
-                typeAcquisition:
-                {
-                    enable: false,
-                    include: [],
-                    exclude: []
-                },
-                errors: [] as ts.Diagnostic[]
-            });
-    });
+    baselineTypeAcquisition("Convert default tsconfig.json to typeAcquisition ", {}, "tsconfig.json");
 
-    it("Convert tsconfig.json with only enable property to typeAcquisition ", () => {
-        assertTypeAcquisition(
+    baselineTypeAcquisition("Convert tsconfig.json with only enable property to typeAcquisition ",
+        {
+            typeAcquisition:
             {
-                typeAcquisition:
-                {
-                    enable: true
-                }
-            }, "tsconfig.json",
-            {
-                typeAcquisition:
-                {
-                    enable: true,
-                    include: [],
-                    exclude: []
-                },
-                errors: [] as ts.Diagnostic[]
-            });
-    });
+                enable: true
+            }
+        }, "tsconfig.json",
+    );
 
     // jsconfig.json
-    it("Convert jsconfig.json to typeAcquisition ", () => {
-        assertTypeAcquisition(
-            {
-                typeAcquisition:
-                {
-                    enable: false,
-                    include: ["0.d.ts"],
-                    exclude: ["0.js"]
-                }
-            }, "jsconfig.json",
+    baselineTypeAcquisition("Convert jsconfig.json to typeAcquisition ",
+        {
+            typeAcquisition:
             {
-                typeAcquisition:
-                {
-                    enable: false,
-                    include: ["0.d.ts"],
-                    exclude: ["0.js"]
-                },
-                errors: [] as ts.Diagnostic[]
-            });
-    });
+                enable: false,
+                include: ["0.d.ts"],
+                exclude: ["0.js"]
+            }
+        }, "jsconfig.json",
+    );
 
-    it("Convert default jsconfig.json to typeAcquisition ", () => {
-        assertTypeAcquisition({ }, "jsconfig.json",
-            {
-                typeAcquisition:
-                {
-                    enable: true,
-                    include: [],
-                    exclude: []
-                },
-                errors: [] as ts.Diagnostic[]
-            });
-    });
+    baselineTypeAcquisition("Convert default jsconfig.json to typeAcquisition ", {}, "jsconfig.json");
 
-    it("Convert incorrect format jsconfig.json to typeAcquisition ", () => {
-        assertTypeAcquisition(
-            {
-                typeAcquisition:
-                {
-                    enableAutoDiscovy: true,
-                }
-            }, "jsconfig.json",
+    baselineTypeAcquisition("Convert incorrect format jsconfig.json to typeAcquisition ",
+        {
+            typeAcquisition:
             {
-                typeAcquisition:
-                {
-                    enable: true,
-                    include: [],
-                    exclude: []
-                },
-                errors: [
-                    {
-                        category: ts.Diagnostics.Unknown_type_acquisition_option_0.category,
-                        code: ts.Diagnostics.Unknown_type_acquisition_option_0.code,
-                        file: undefined,
-                        start: 0,
-                        length: 0,
-                        messageText: undefined!, // TODO: GH#18217
-                    }
-                ]
-            });
-    });
+                enableAutoDiscovy: true,
+            }
+        }, "jsconfig.json",
+    );
 
-    it("Convert jsconfig.json with only enable property to typeAcquisition ", () => {
-        assertTypeAcquisition(
-            {
-                typeAcquisition:
-                {
-                    enable: false
-                }
-            }, "jsconfig.json",
+    baselineTypeAcquisition("Convert jsconfig.json with only enable property to typeAcquisition ",
+        {
+            typeAcquisition:
             {
-                typeAcquisition:
-                {
-                    enable: false,
-                    include: [],
-                    exclude: []
-                },
-                errors: [] as ts.Diagnostic[]
-            });
-    });
+                enable: false
+            }
+        }, "jsconfig.json",
+    );
 });
diff --git a/src/testRunner/unittests/config/helpers.ts b/src/testRunner/unittests/config/helpers.ts
new file mode 100644
index 0000000000000..8c754e92e63a0
--- /dev/null
+++ b/src/testRunner/unittests/config/helpers.ts
@@ -0,0 +1,105 @@
+import * as fakes from "../../_namespaces/fakes";
+import * as Harness from "../../_namespaces/Harness";
+import * as ts from "../../_namespaces/ts";
+import * as vfs from "../../_namespaces/vfs";
+
+function getParsedCommandJson(
+    jsonText: string,
+    configFileName: string,
+    host: fakes.ParseConfigHost,
+    basePath: string | undefined,
+    existingOptions: ts.CompilerOptions | undefined,
+    existingWatchOptions: ts.WatchOptions | undefined,
+) {
+    const parsed = ts.parseConfigFileTextToJson(configFileName, jsonText);
+    return ts.parseJsonConfigFileContent(
+        parsed.config,
+        host,
+        basePath ?? host.sys.getCurrentDirectory(),
+        existingOptions,
+        configFileName,
+        /*resolutionStack*/ undefined,
+        /*extraFileExtensions*/ undefined,
+        /*extendedConfigCache*/ undefined,
+        existingWatchOptions,
+    );
+}
+
+function getParsedCommandJsonSourceFile(
+    jsonText: string,
+    configFileName: string,
+    host: fakes.ParseConfigHost,
+    basePath: string | undefined,
+    existingOptions: ts.CompilerOptions | undefined,
+    existingWatchOptions: ts.WatchOptions | undefined,
+) {
+    const parsed = ts.parseJsonText(configFileName, jsonText);
+    return ts.parseJsonSourceFileConfigFileContent(
+        parsed,
+        host,
+        basePath ?? host.sys.getCurrentDirectory(),
+        existingOptions,
+        configFileName,
+        /*resolutionStack*/ undefined,
+        /*extraFileExtensions*/ undefined,
+        /*extendedConfigCache*/ undefined,
+        existingWatchOptions,
+    );
+}
+
+export interface ParseConfigInput {
+    createHost: (baseline: string[]) => fakes.ParseConfigHost;
+    jsonText: string;
+    configFileName: string;
+    basePath?: string,
+    existingOptions?: ts.CompilerOptions;
+    existingWatchOptions?: ts.WatchOptions;
+    baselineParsed(baseline: string[], parsed: ts.ParsedCommandLine): void;
+}
+export interface BaselineParseConfigInput {
+    scenario: string;
+    subScenario: string;
+    input(): ParseConfigInput[];
+    skipJson?: boolean;
+    skipErrors?: boolean;
+    skipFs?: boolean;
+    header?(baseline: string[]): void;
+}
+export function baselineParseConfig(input: BaselineParseConfigInput) {
+    if (!input.skipJson) baselineParseConfigWith("with json api", getParsedCommandJson, input);
+    baselineParseConfigWith("with jsonSourceFile api", getParsedCommandJsonSourceFile, input);
+}
+
+export function baselineParseConfigHost(baseline: string[], host: fakes.ParseConfigHost) {
+    baseline.push("Fs::", vfs.formatPatch(host.sys.vfs.diff(/*base*/ undefined, { baseIsNotShadowRoot: true })!));
+}
+
+function baselineParseConfigWith(
+    jsonTest: string,
+    getParsed: typeof getParsedCommandJson,
+    { scenario, subScenario, input, skipErrors, skipFs, header }: BaselineParseConfigInput,
+) {
+    describe(subScenario, () => {
+        it(jsonTest, () => {
+            const baseline: string[] = [];
+            header?.(baseline);
+            for (const { createHost, jsonText, configFileName, existingOptions, basePath, existingWatchOptions, baselineParsed } of input()) {
+                const host = createHost(baseline);
+                if (!skipFs) baselineParseConfigHost(baseline, host);
+                baseline.push(`configFileName:: ${configFileName}`);
+                const parsed = getParsed(jsonText, configFileName, host, basePath, existingOptions, existingWatchOptions);
+                baselineParsed(baseline, parsed);
+                if (!skipErrors) {
+                    baseline.push("Errors::");
+                    baseline.push(ts.formatDiagnosticsWithColorAndContext(parsed.errors, {
+                        getCurrentDirectory: () => basePath || host.sys.getCurrentDirectory(),
+                        getCanonicalFileName: ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames),
+                        getNewLine: () => host.sys.newLine,
+                    }));
+                }
+                baseline.push("");
+            }
+            Harness.Baseline.runBaseline(`config/${scenario}/${subScenario} ${jsonTest}.js`, baseline.join("\n"));
+        });
+    });
+}
\ No newline at end of file
diff --git a/src/testRunner/unittests/config/matchFiles.ts b/src/testRunner/unittests/config/matchFiles.ts
index a7ecae0425221..33c21ff241011 100644
--- a/src/testRunner/unittests/config/matchFiles.ts
+++ b/src/testRunner/unittests/config/matchFiles.ts
@@ -1,6 +1,7 @@
 import * as fakes from "../../_namespaces/fakes";
 import * as ts from "../../_namespaces/ts";
 import * as vfs from "../../_namespaces/vfs";
+import { baselineParseConfig } from "./helpers";
 
 const caseInsensitiveBasePath = "c:/dev/";
 const caseInsensitiveTsconfigPath = "c:/dev/tsconfig.json";
@@ -103,1421 +104,488 @@ const caseSensitiveOrderingDiffersWithCaseHost = new fakes.ParseConfigHost(new v
     "/dev/zebra.ts": "",
 }}));
 
-function assertParsed(actual: ts.ParsedCommandLine, expected: ts.ParsedCommandLine): void {
-    assert.deepEqual(actual.fileNames, expected.fileNames);
-    assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
-    assert.deepEqual(actual.errors, expected.errors);
-}
-
-function validateMatches(expected: ts.ParsedCommandLine, json: any, host: ts.ParseConfigHost, basePath: string, existingOptions?: ts.CompilerOptions, configFileName?: string, resolutionStack?: ts.Path[]) {
-    {
-        const jsonText = JSON.stringify(json);
-        const result = ts.parseJsonText(caseInsensitiveTsconfigPath, jsonText);
-        const actual = ts.parseJsonSourceFileConfigFileContent(result, host, basePath, existingOptions, configFileName, resolutionStack);
-        for (const error of expected.errors) {
-            if (error.file) {
-                error.file = result;
+function baselineMatches(subScenario: string, json: any, host: fakes.ParseConfigHost, basePath: string) {
+    const jsonText = JSON.stringify(json, undefined, " ");
+    baselineParseConfig({
+        scenario: "matchFiles",
+        subScenario,
+        input: () => [{
+            createHost: () => host,
+            jsonText,
+            configFileName: caseInsensitiveTsconfigPath,
+            basePath,
+            baselineParsed: (baseline, parsed) => {
+                const wildcardDirectories = parsed.wildcardDirectories ? {} as ts.MapLike<string> : undefined;
+                if (parsed.wildcardDirectories) ts.getOwnKeys(parsed.wildcardDirectories).forEach(dir => wildcardDirectories![dir] = `WatchDirectoryFlags.${(ts as any).WatchDirectoryFlags[parsed.wildcardDirectories![dir]]}`);
+                baseline.push("Result", JSON.stringify({
+                    ...parsed,
+                    errors: undefined,
+                    wildcardDirectories,
+                }, undefined, " "));
             }
-        }
-        assertParsed(actual, expected);
-    }
-    {
-        const actual = ts.parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName, resolutionStack);
-        expected.errors = expected.errors.map((error): ts.Diagnostic => ({
-            category: error.category,
-            code: error.code,
-            file: undefined,
-            length: undefined,
-            messageText: error.messageText,
-            start: undefined,
-            reportsUnnecessary: undefined,
-            reportsDeprecated: undefined
-        }));
-        assertParsed(actual, expected);
-    }
-}
-
-function createDiagnosticForConfigFile(json: any, start: number, length: number, diagnosticMessage: ts.DiagnosticMessage, arg0: string) {
-    const text = JSON.stringify(json);
-    const file = {
-        fileName: caseInsensitiveTsconfigPath,
-        kind: ts.SyntaxKind.SourceFile,
-        text
-    } as ts.SourceFile;
-    return ts.createFileDiagnostic(file, start, length, diagnosticMessage, arg0);
+        }],
+        header: baseline => baseline.push("config:", jsonText),
+    });
 }
 
 describe("unittests:: config:: matchFiles", () => {
-    it("with defaults", () => {
-        const json = {};
-        const expected: ts.ParsedCommandLine = {
-            options: {},
-            errors: [],
-            fileNames: [
-                "c:/dev/a.ts",
-                "c:/dev/b.ts",
-                "c:/dev/x/a.ts"
-            ],
-            wildcardDirectories: {
-                "c:/dev": ts.WatchDirectoryFlags.Recursive
-            },
-        };
-        validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-    });
-
+    baselineMatches("with defaults", {}, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
     describe("with literal file list", () => {
-        it("without exclusions", () => {
-            const json = {
-                files: [
-                    "a.ts",
-                    "b.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("missing files are still present", () => {
-            const json = {
-                files: [
-                    "z.ts",
-                    "x.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/z.ts",
-                    "c:/dev/x.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("are not removed due to excludes", () => {
-            const json = {
-                files: [
-                    "a.ts",
-                    "b.ts"
-                ],
-                exclude: [
-                    "b.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
+        baselineMatches("without exclusions with literal file list", {
+            files: [
+                "a.ts",
+                "b.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("missing files are still present", {
+            files: [
+                "z.ts",
+                "x.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("are not removed due to excludes", {
+            files: [
+                "a.ts",
+                "b.ts"
+            ],
+            exclude: [
+                "b.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
     });
 
     describe("with literal include list", () => {
-        it("without exclusions", () => {
-            const json = {
-                include: [
-                    "a.ts",
-                    "b.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("with non .ts file extensions are excluded", () => {
-            const json = {
-                include: [
-                    "a.js",
-                    "b.js"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [
-                    ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                        caseInsensitiveTsconfigPath, JSON.stringify(json.include), "[]")
-                ],
-                fileNames: [],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-        });
-        it("with missing files are excluded", () => {
-            const json = {
-                include: [
-                    "z.ts",
-                    "x.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [
-                    ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                        caseInsensitiveTsconfigPath, JSON.stringify(json.include), "[]")
-                ],
-                fileNames: [],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-        });
-        it("with literal excludes", () => {
-            const json = {
-                include: [
-                    "a.ts",
-                    "b.ts"
-                ],
-                exclude: [
-                    "b.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("with wildcard excludes", () => {
-            const json = {
-                include: [
-                    "a.ts",
-                    "b.ts",
-                    "z/a.ts",
-                    "z/abz.ts",
-                    "z/aba.ts",
-                    "x/b.ts"
-                ],
-                exclude: [
-                    "*.ts",
-                    "z/??z.ts",
-                    "*/b.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/z/a.ts",
-                    "c:/dev/z/aba.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("with recursive excludes", () => {
-            const json = {
-                include: [
-                    "a.ts",
-                    "b.ts",
-                    "x/a.ts",
-                    "x/b.ts",
-                    "x/y/a.ts",
-                    "x/y/b.ts"
-                ],
-                exclude: [
-                    "**/b.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/x/a.ts",
-                    "c:/dev/x/y/a.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("with case sensitive exclude", () => {
-            const json = {
-                include: [
-                    "B.ts"
-                ],
-                exclude: [
-                    "**/b.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "/dev/B.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseSensitiveHost, caseSensitiveBasePath);
-        });
-        it("with common package folders and no exclusions", () => {
-            const json = {
-                include: [
-                    "a.ts",
-                    "b.ts",
-                    "node_modules/a.ts",
-                    "bower_components/a.ts",
-                    "jspm_packages/a.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts",
-                    "c:/dev/node_modules/a.ts",
-                    "c:/dev/bower_components/a.ts",
-                    "c:/dev/jspm_packages/a.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-        });
-        it("with common package folders and exclusions", () => {
-            const json = {
-                include: [
-                    "a.ts",
-                    "b.ts",
-                    "node_modules/a.ts",
-                    "bower_components/a.ts",
-                    "jspm_packages/a.ts"
-                ],
-                exclude: [
-                    "a.ts",
-                    "b.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/node_modules/a.ts",
-                    "c:/dev/bower_components/a.ts",
-                    "c:/dev/jspm_packages/a.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-        });
-        it("with common package folders and empty exclude", () => {
-            const json = {
-                include: [
-                    "a.ts",
-                    "b.ts",
-                    "node_modules/a.ts",
-                    "bower_components/a.ts",
-                    "jspm_packages/a.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts",
-                    "c:/dev/node_modules/a.ts",
-                    "c:/dev/bower_components/a.ts",
-                    "c:/dev/jspm_packages/a.ts"
-                ],
-                wildcardDirectories: {},
-            };
-            validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-        });
+        baselineMatches("without exclusions with literal include list", {
+            include: [
+                "a.ts",
+                "b.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with non .ts file extensions are excluded", {
+            include: [
+                "a.js",
+                "b.js"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with missing files are excluded with literal include list", {
+            include: [
+                "z.ts",
+                "x.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with literal excludes", {
+            include: [
+                "a.ts",
+                "b.ts"
+            ],
+            exclude: [
+                "b.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with wildcard excludes", {
+            include: [
+                "a.ts",
+                "b.ts",
+                "z/a.ts",
+                "z/abz.ts",
+                "z/aba.ts",
+                "x/b.ts"
+            ],
+            exclude: [
+                "*.ts",
+                "z/??z.ts",
+                "*/b.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with recursive excludes", {
+            include: [
+                "a.ts",
+                "b.ts",
+                "x/a.ts",
+                "x/b.ts",
+                "x/y/a.ts",
+                "x/y/b.ts"
+            ],
+            exclude: [
+                "**/b.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with case sensitive exclude", {
+            include: [
+                "B.ts"
+            ],
+            exclude: [
+                "**/b.ts"
+            ]
+        }, caseSensitiveHost, caseSensitiveBasePath);
+        baselineMatches("with common package folders and no exclusions", {
+            include: [
+                "a.ts",
+                "b.ts",
+                "node_modules/a.ts",
+                "bower_components/a.ts",
+                "jspm_packages/a.ts"
+            ]
+        }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+        baselineMatches("with common package folders and exclusions", {
+            include: [
+                "a.ts",
+                "b.ts",
+                "node_modules/a.ts",
+                "bower_components/a.ts",
+                "jspm_packages/a.ts"
+            ],
+            exclude: [
+                "a.ts",
+                "b.ts"
+            ]
+        }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+        baselineMatches("with common package folders and empty exclude", {
+            include: [
+                "a.ts",
+                "b.ts",
+                "node_modules/a.ts",
+                "bower_components/a.ts",
+                "jspm_packages/a.ts"
+            ]
+        }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
     });
 
     describe("with wildcard include list", () => {
-        it("is sorted in include order, then in alphabetical order", () => {
-            const json = {
-                include: [
-                    "z/*.ts",
-                    "x/*.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/z/a.ts",
-                    "c:/dev/z/aba.ts",
-                    "c:/dev/z/abz.ts",
-                    "c:/dev/z/b.ts",
-                    "c:/dev/z/bba.ts",
-                    "c:/dev/z/bbz.ts",
-                    "c:/dev/x/a.ts",
-                    "c:/dev/x/aa.ts",
-                    "c:/dev/x/b.ts"
-                ],
-                wildcardDirectories: {
-                    "c:/dev/z": ts.WatchDirectoryFlags.None,
-                    "c:/dev/x": ts.WatchDirectoryFlags.None
-                },
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("same named declarations are excluded", () => {
-            const json = {
+        baselineMatches("is sorted in include order, then in alphabetical order", {
+            include: [
+                "z/*.ts",
+                "x/*.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("same named declarations are excluded", {
+            include: [
+                "*.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("star matches only ts files", {
+            include: [
+                "*"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("question matches only a single character", {
+            include: [
+                "x/?.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with recursive directory", {
+            include: [
+                "**/a.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with multiple recursive directories", {
+            include: [
+                "x/y/**/a.ts",
+                "x/**/a.ts",
+                "z/**/a.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("case sensitive", {
+            include: [
+                "**/A.ts"
+            ]
+        }, caseSensitiveHost, caseSensitiveBasePath);
+        baselineMatches("with missing files are excluded with wildcard include list", {
+            include: [
+                "*/z.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("always include literal files", {
+            files: [
+                "a.ts"
+            ],
+            include: [
+                "*/z.ts"
+            ],
+            exclude: [
+                "**/a.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("exclude folders", {
+            include: [
+                "**/*"
+            ],
+            exclude: [
+                "z",
+                "x"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        describe("with common package folders", () => {
+            baselineMatches("and no exclusions", {
                 include: [
-                    "*.ts"
+                    "**/a.ts"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts",
-                    "c:/dev/c.d.ts"
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.None
-                },
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("`*` matches only ts files", () => {
-            const json = {
+            }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+            baselineMatches("and exclusions", {
                 include: [
-                    "*"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts",
-                    "c:/dev/c.d.ts"
+                    "**/?.ts"
                 ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.None
-                },
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("`?` matches only a single character", () => {
-            const json = {
-                include: [
-                    "x/?.ts"
+                exclude: [
+                    "a.ts"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/x/a.ts",
-                    "c:/dev/x/b.ts"
-                ],
-                wildcardDirectories: {
-                    "c:/dev/x": ts.WatchDirectoryFlags.None
-                },
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("with recursive directory", () => {
-            const json = {
+            }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+            baselineMatches("and empty exclude", {
                 include: [
                     "**/a.ts"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/x/a.ts",
-                    "c:/dev/x/y/a.ts",
-                    "c:/dev/z/a.ts"
                 ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                },
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("with multiple recursive directories", () => {
-            const json = {
+                exclude: [] as string[]
+            }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+            baselineMatches("and explicit recursive include", {
                 include: [
-                    "x/y/**/a.ts",
-                    "x/**/a.ts",
-                    "z/**/a.ts"
+                    "**/a.ts",
+                    "**/node_modules/a.ts"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/x/y/a.ts",
-                    "c:/dev/x/a.ts",
-                    "c:/dev/z/a.ts"
-                ],
-                wildcardDirectories: {
-                    "c:/dev/x": ts.WatchDirectoryFlags.Recursive,
-                    "c:/dev/z": ts.WatchDirectoryFlags.Recursive
-                },
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("case sensitive", () => {
-            const json = {
+            }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+            baselineMatches("and wildcard include", {
                 include: [
-                    "**/A.ts"
+                    "*/a.ts"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "/dev/A.ts"
-                ],
-                wildcardDirectories: {
-                    "/dev": ts.WatchDirectoryFlags.Recursive
-                },
-            };
-            validateMatches(expected, json, caseSensitiveHost, caseSensitiveBasePath);
-        });
-        it("with missing files are excluded", () => {
-            const json = {
+            }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+            baselineMatches("and explicit wildcard include", {
                 include: [
-                    "*/z.ts"
+                    "*/a.ts",
+                    "node_modules/a.ts"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [
-                    ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                        caseInsensitiveTsconfigPath, JSON.stringify(json.include), "[]")
-                ],
-                fileNames: [],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                },
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
+            }, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
         });
-        it("always include literal files", () => {
-            const json = {
-                files: [
-                    "a.ts"
-                ],
+        baselineMatches("exclude .js files when allowJs=false", {
+            compilerOptions: {
+                allowJs: false
+            },
+            include: [
+                "js/*"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("include .js files when allowJs=true", {
+            compilerOptions: {
+                allowJs: true
+            },
+            include: [
+                "js/*"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("include explicitly listed .min.js files when allowJs=true", {
+            compilerOptions: {
+                allowJs: true
+            },
+            include: [
+                "js/*.min.js"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("include paths outside of the project", {
+            include: [
+                "*",
+                "c:/ext/*"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("include paths outside of the project using relative paths", {
+            include: [
+                "*",
+                "../ext/*"
+            ],
+            exclude: [
+                "**"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("exclude paths outside of the project using relative paths", {
+            include: [
+                "c:/**/*"
+            ],
+            exclude: [
+                "../**"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("include files with .. in their name", {
+            include: [
+                "c:/ext/b/a..b.ts"
+            ],
+            exclude: [
+                "**"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("exclude files with .. in their name", {
+            include: [
+                "c:/ext/**/*"
+            ],
+            exclude: [
+                "c:/ext/b/a..b.ts"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+        baselineMatches("with jsx=none, allowJs=false", {
+            compilerOptions: {
+                allowJs: false
+            }
+        }, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+        baselineMatches("with jsx=preserve, allowJs=false", {
+            compilerOptions: {
+                jsx: "preserve",
+                allowJs: false
+            }
+        }, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+        baselineMatches("with jsx=react-native, allowJs=false", {
+            compilerOptions: {
+                jsx: "react-native",
+                allowJs: false
+            }
+        }, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+        baselineMatches("with jsx=none, allowJs=true", {
+            compilerOptions: {
+                allowJs: true
+            }
+        }, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+        baselineMatches("with jsx=preserve, allowJs=true", {
+            compilerOptions: {
+                jsx: "preserve",
+                allowJs: true
+            }
+        }, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+        baselineMatches("with jsx=react-native, allowJs=true", {
+            compilerOptions: {
+                jsx: "react-native",
+                allowJs: true
+            }
+        }, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+        baselineMatches("exclude .min.js files using wildcards", {
+            compilerOptions: {
+                allowJs: true
+            },
+            include: [
+                "js/*.min.js"
+            ],
+            exclude: [
+                "js/a*"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+
+        describe("with trailing recursive directory", () => {
+            baselineMatches("in includes with trailing recursive directory", {
                 include: [
-                    "*/z.ts"
-                ],
-                exclude: [
-                    "**/a.ts"
+                    "**"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts"
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                },
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("exclude folders", () => {
-            const json = {
+            }, caseInsensitiveHost, caseInsensitiveBasePath);
+            baselineMatches("in excludes with trailing recursive directory", {
                 include: [
                     "**/*"
                 ],
                 exclude: [
-                    "z",
-                    "x"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts",
-                    "c:/dev/c.d.ts"
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        describe("with common package folders", () => {
-            it("and no exclusions", () => {
-                const json = {
-                    include: [
-                        "**/a.ts"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/a.ts",
-                        "c:/dev/x/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    },
-                };
-                validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-            });
-            it("and exclusions", () => {
-                const json = {
-                    include: [
-                        "**/?.ts"
-                    ],
-                    exclude: [
-                        "a.ts"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/b.ts",
-                        "c:/dev/x/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    },
-                };
-                validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-            });
-            it("and empty exclude", () => {
-                const json = {
-                    include: [
-                        "**/a.ts"
-                    ],
-                    exclude: [] as string[]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/a.ts",
-                        "c:/dev/x/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    },
-                };
-                validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-            });
-            it("and explicit recursive include", () => {
-                const json = {
-                    include: [
-                        "**/a.ts",
-                        "**/node_modules/a.ts"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/a.ts",
-                        "c:/dev/x/a.ts",
-                        "c:/dev/node_modules/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    },
-                };
-                validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-            });
-            it("and wildcard include", () => {
-                const json = {
-                    include: [
-                        "*/a.ts"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/x/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    },
-                };
-                validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-            });
-            it("and explicit wildcard include", () => {
-                const json = {
-                    include: [
-                        "*/a.ts",
-                        "node_modules/a.ts"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/x/a.ts",
-                        "c:/dev/node_modules/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    },
-                };
-                validateMatches(expected, json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
-            });
-        });
-        it("exclude .js files when allowJs=false", () => {
-            const json = {
-                compilerOptions: {
-                    allowJs: false
-                },
-                include: [
-                    "js/*"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    allowJs: false
-                },
-                errors: [
-                    ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                        caseInsensitiveTsconfigPath, JSON.stringify(json.include), "[]")
-                ],
-                fileNames: [],
-                wildcardDirectories: {
-                    "c:/dev/js": ts.WatchDirectoryFlags.None
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-        });
-        it("include .js files when allowJs=true", () => {
-            const json = {
-                compilerOptions: {
-                    allowJs: true
-                },
-                include: [
-                    "js/*"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    allowJs: true
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/js/a.js",
-                    "c:/dev/js/b.js"
-                ],
-                wildcardDirectories: {
-                    "c:/dev/js": ts.WatchDirectoryFlags.None
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("include explicitly listed .min.js files when allowJs=true", () => {
-            const json = {
-                compilerOptions: {
-                    allowJs: true
-                },
-                include: [
-                    "js/*.min.js"
+                    "**"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    allowJs: true
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/js/ab.min.js",
-                    "c:/dev/js/d.min.js"
-                ],
-                wildcardDirectories: {
-                    "c:/dev/js": ts.WatchDirectoryFlags.None
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
+            }, caseInsensitiveHost, caseInsensitiveBasePath);
         });
-        it("include paths outside of the project", () => {
-            const json = {
+        describe("with multiple recursive directory patterns", () => {
+            baselineMatches("in includes with multiple recursive directory patterns", {
                 include: [
-                    "*",
-                    "c:/ext/*"
+                    "**/x/**/*"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.ts",
-                    "c:/dev/c.d.ts",
-                    "c:/ext/ext.ts"
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.None,
-                    "c:/ext": ts.WatchDirectoryFlags.None
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
+            }, caseInsensitiveHost, caseInsensitiveBasePath);
         });
-        it("include paths outside of the project using relative paths", () => {
-            const json = {
-                include: [
-                    "*",
-                    "../ext/*"
-                ],
-                exclude: [
-                    "**"
-                ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/ext/ext.ts"
-                ],
-                wildcardDirectories: {
-                    "c:/ext": ts.WatchDirectoryFlags.None
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("exclude paths outside of the project using relative paths", () => {
-            const json = {
+        baselineMatches("in excludes", {
+            include: [
+                "**/a.ts"
+            ],
+            exclude: [
+                "**/x/**"
+            ]
+        }, caseInsensitiveHost, caseInsensitiveBasePath);
+
+        describe("with parent directory symbols after a recursive directory pattern", () => {
+            baselineMatches("in includes immediately after", {
                 include: [
-                    "c:/**/*"
-                ],
-                exclude: [
-                    "../**"
+                    "**/../*"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [
-                    ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                        caseInsensitiveTsconfigPath, JSON.stringify(json.include), JSON.stringify(json.exclude))]
-                ,
-                fileNames: [],
-                wildcardDirectories: {}
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-        });
-        it("include files with .. in their name", () => {
-            const json = {
+            }, caseInsensitiveHost, caseInsensitiveBasePath);
+
+            baselineMatches("in includes after a subdirectory", {
                 include: [
-                    "c:/ext/b/a..b.ts"
-                ],
-                exclude: [
-                    "**"
+                    "**/y/../*"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/ext/b/a..b.ts"
-                ],
-                wildcardDirectories: {}
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("exclude files with .. in their name", () => {
-            const json = {
+            }, caseInsensitiveHost, caseInsensitiveBasePath);
+
+            baselineMatches("in excludes immediately after", {
                 include: [
-                    "c:/ext/**/*"
+                    "**/a.ts"
                 ],
                 exclude: [
-                    "c:/ext/b/a..b.ts"
+                    "**/.."
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/ext/ext.ts",
-                ],
-                wildcardDirectories: {
-                    "c:/ext": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-        it("with jsx=none, allowJs=false", () => {
-            const json = {
-                compilerOptions: {
-                    allowJs: false
-                }
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    allowJs: false
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.tsx",
-                    "c:/dev/c.tsx",
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-        });
-        it("with jsx=preserve, allowJs=false", () => {
-            const json = {
-                compilerOptions: {
-                    jsx: "preserve",
-                    allowJs: false
-                }
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    jsx: ts.JsxEmit.Preserve,
-                    allowJs: false
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.tsx",
-                    "c:/dev/c.tsx",
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-        });
-        it("with jsx=react-native, allowJs=false", () => {
-            const json = {
-                compilerOptions: {
-                    jsx: "react-native",
-                    allowJs: false
-                }
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    jsx: ts.JsxEmit.ReactNative,
-                    allowJs: false
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.tsx",
-                    "c:/dev/c.tsx",
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-        });
-        it("with jsx=none, allowJs=true", () => {
-            const json = {
-                compilerOptions: {
-                    allowJs: true
-                }
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    allowJs: true
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.tsx",
-                    "c:/dev/c.tsx",
-                    "c:/dev/d.js",
-                    "c:/dev/e.jsx",
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-        });
-        it("with jsx=preserve, allowJs=true", () => {
-            const json = {
-                compilerOptions: {
-                    jsx: "preserve",
-                    allowJs: true
-                }
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    jsx: ts.JsxEmit.Preserve,
-                    allowJs: true
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.tsx",
-                    "c:/dev/c.tsx",
-                    "c:/dev/d.js",
-                    "c:/dev/e.jsx",
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-        });
-        it("with jsx=react-native, allowJs=true", () => {
-            const json = {
-                compilerOptions: {
-                    jsx: "react-native",
-                    allowJs: true
-                }
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    jsx: ts.JsxEmit.ReactNative,
-                    allowJs: true
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/a.ts",
-                    "c:/dev/b.tsx",
-                    "c:/dev/c.tsx",
-                    "c:/dev/d.js",
-                    "c:/dev/e.jsx",
-                ],
-                wildcardDirectories: {
-                    "c:/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-        });
-        it("exclude .min.js files using wildcards", () => {
-            const json = {
-                compilerOptions: {
-                    allowJs: true
-                },
+            }, caseInsensitiveHost, caseInsensitiveBasePath);
+
+            baselineMatches("in excludes after a subdirectory", {
                 include: [
-                    "js/*.min.js"
+                    "**/a.ts"
                 ],
                 exclude: [
-                    "js/a*"
+                    "**/y/.."
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {
-                    allowJs: true
-                },
-                errors: [],
-                fileNames: [
-                    "c:/dev/js/d.min.js"
-                ],
-                wildcardDirectories: {
-                    "c:/dev/js": ts.WatchDirectoryFlags.None
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-        });
-
-        describe("with trailing recursive directory", () => {
-            it("in includes", () => {
-                const json = {
-                    include: [
-                        "**"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [
-                        createDiagnosticForConfigFile(json, 12, 4, ts.Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, "**"),
-                        ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                            caseInsensitiveTsconfigPath, JSON.stringify(json.include), "[]")
-                    ],
-                    fileNames: [],
-                    wildcardDirectories: {}
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-            });
-            it("in excludes", () => {
-                const json = {
-                    include: [
-                        "**/*"
-                    ],
-                    exclude: [
-                        "**"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [
-                        ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                            caseInsensitiveTsconfigPath, JSON.stringify(json.include), JSON.stringify(json.exclude))
-                    ],
-                    fileNames: [],
-                    wildcardDirectories: {}
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-            });
-        });
-        describe("with multiple recursive directory patterns", () => {
-            it("in includes", () => {
-                const json = {
-                    include: [
-                        "**/x/**/*"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/x/a.ts",
-                        "c:/dev/x/aa.ts",
-                        "c:/dev/x/b.ts",
-                        "c:/dev/x/y/a.ts",
-                        "c:/dev/x/y/b.ts",
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    }
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-            });
-            it("in excludes", () => {
-                const json = {
-                    include: [
-                        "**/a.ts"
-                    ],
-                    exclude: [
-                        "**/x/**"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/a.ts",
-                        "c:/dev/z/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    }
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-            });
-        });
-
-        describe("with parent directory symbols after a recursive directory pattern", () => {
-            it("in includes immediately after", () => {
-                const json = {
-                    include: [
-                        "**/../*"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [
-                        createDiagnosticForConfigFile(json, 12, 9, ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, "**/../*"),
-                        ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                            caseInsensitiveTsconfigPath, JSON.stringify(json.include), "[]")
-                    ],
-                    fileNames: [],
-                    wildcardDirectories: {}
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-            });
-
-            it("in includes after a subdirectory", () => {
-                const json = {
-                    include: [
-                        "**/y/../*"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [
-                        createDiagnosticForConfigFile(json, 12, 11, ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, "**/y/../*"),
-                        ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                            caseInsensitiveTsconfigPath, JSON.stringify(json.include), "[]")
-                    ],
-                    fileNames: [],
-                    wildcardDirectories: {}
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-            });
-
-            it("in excludes immediately after", () => {
-                const json = {
-                    include: [
-                        "**/a.ts"
-                    ],
-                    exclude: [
-                        "**/.."
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [
-                        createDiagnosticForConfigFile(json, 34, 7, ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, "**/..")
-                    ],
-                    fileNames: [
-                        "c:/dev/a.ts",
-                        "c:/dev/x/a.ts",
-                        "c:/dev/x/y/a.ts",
-                        "c:/dev/z/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    }
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-            });
-
-            it("in excludes after a subdirectory", () => {
-                const json = {
-                    include: [
-                        "**/a.ts"
-                    ],
-                    exclude: [
-                        "**/y/.."
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [
-                        createDiagnosticForConfigFile(json, 34, 9, ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, "**/y/..")
-                    ],
-                    fileNames: [
-                        "c:/dev/a.ts",
-                        "c:/dev/x/a.ts",
-                        "c:/dev/x/y/a.ts",
-                        "c:/dev/z/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    }
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-            });
+            }, caseInsensitiveHost, caseInsensitiveBasePath);
         });
 
         describe("with implicit globbification", () => {
-            it("Expands 'z' to 'z/**/*'", () => {
-                const json = {
-                    include: ["z"]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [ "a.ts", "aba.ts", "abz.ts", "b.ts", "bba.ts", "bbz.ts" ].map(x => `c:/dev/z/${x}`),
-                    wildcardDirectories: {
-                        "c:/dev/z": ts.WatchDirectoryFlags.Recursive
-                    }
-                };
-                validateMatches(expected, json, caseInsensitiveHost, caseInsensitiveBasePath);
-            });
+            baselineMatches("Expands z to z/starstart/star", {
+                include: ["z"]
+            }, caseInsensitiveHost, caseInsensitiveBasePath);
         });
     });
 
     describe("with files or folders that begin with a .", () => {
-        it("that are not explicitly included", () => {
-            const json = {
+        baselineMatches("that are not explicitly included", {
+            include: [
+                "x/**/*",
+                "w/*/*"
+            ]
+        }, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
+        describe("that are explicitly included", () => {
+            baselineMatches("without wildcards", {
                 include: [
-                    "x/**/*",
-                    "w/*/*"
+                    "x/.y/a.ts",
+                    "c:/dev/.z/.b.ts"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "c:/dev/x/d.ts",
-                    "c:/dev/x/y/d.ts",
-                ],
-                wildcardDirectories: {
-                    "c:/dev/x": ts.WatchDirectoryFlags.Recursive,
-                    "c:/dev/w": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
-        });
-        describe("that are explicitly included", () => {
-            it("without wildcards", () => {
-                const json = {
-                    include: [
-                        "x/.y/a.ts",
-                        "c:/dev/.z/.b.ts"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/x/.y/a.ts",
-                        "c:/dev/.z/.b.ts"
-                    ],
-                    wildcardDirectories: {}
-                };
-                validateMatches(expected, json, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
-            });
-            it("with recursive wildcards that match directories", () => {
-                const json = {
-                    include: [
-                        "**/.*/*"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/.z/c.ts",
-                        "c:/dev/g.min.js/.g/g.ts",
-                        "c:/dev/w/.u/e.ts",
-                        "c:/dev/x/.y/a.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.Recursive
-                    }
-                };
-                validateMatches(expected, json, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
-            });
-            it("with recursive wildcards that match nothing", () => {
-                const json = {
-                    include: [
-                        "x/**/.y/*",
-                        ".z/**/.*"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [],
-                    fileNames: [
-                        "c:/dev/x/.y/a.ts",
-                        "c:/dev/.z/.b.ts"
-                    ],
-                    wildcardDirectories: {
-                        "c:/dev/.z": ts.WatchDirectoryFlags.Recursive,
-                        "c:/dev/x": ts.WatchDirectoryFlags.Recursive
-                    }
-                };
-                validateMatches(expected, json, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
-            });
-            it("with wildcard excludes that implicitly exclude dotted files", () => {
-                const json = {
-                    include: [
-                        "**/.*/*"
-                    ],
-                    exclude: [
-                        "**/*"
-                    ]
-                };
-                const expected: ts.ParsedCommandLine = {
-                    options: {},
-                    errors: [
-                        ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
-                            caseInsensitiveTsconfigPath, JSON.stringify(json.include), JSON.stringify(json.exclude))
-                    ],
-                    fileNames: [],
-                    wildcardDirectories: {}
-                };
-                validateMatches(expected, json, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath, /*existingOptions*/ undefined, caseInsensitiveTsconfigPath);
-            });
-        });
-    });
-
-    describe("exclude or include patterns which start with **", () => {
-        it("can exclude dirs whose pattern starts with **", () => {
-            const json = {
-                exclude: [
-                    "**/x"
+            }, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
+            baselineMatches("with recursive wildcards that match directories", {
+                include: [
+                    "**/.*/*"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "/dev/A.ts",
-                    "/dev/B.ts",
-                    "/dev/a.ts",
-                    "/dev/b.ts",
-                    "/dev/c.d.ts",
-                    "/dev/q/a/c/b/d.ts",
-                    "/dev/z/a.ts",
-                    "/dev/z/aba.ts",
-                    "/dev/z/abz.ts",
-                    "/dev/z/b.ts",
-                    "/dev/z/bba.ts",
-                    "/dev/z/bbz.ts",
-                ],
-                wildcardDirectories: {
-                    "/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseSensitiveHost, caseSensitiveBasePath);
-        });
-        it("can include dirs whose pattern starts with **", () => {
-            const json = {
+            }, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
+            baselineMatches("with recursive wildcards that match nothing", {
                 include: [
-                    "**/x",
-                    "**/a/**/b"
+                    "x/**/.y/*",
+                    ".z/**/.*"
                 ]
-            };
-            const expected: ts.ParsedCommandLine = {
-                options: {},
-                errors: [],
-                fileNames: [
-                    "/dev/x/a.ts",
-                    "/dev/x/b.ts",
-                    "/dev/x/y/a.ts",
-                    "/dev/x/y/b.ts",
-                    "/dev/q/a/c/b/d.ts",
+            }, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
+            baselineMatches("with wildcard excludes that implicitly exclude dotted files", {
+                include: [
+                    "**/.*/*"
                 ],
-                wildcardDirectories: {
-                    "/dev": ts.WatchDirectoryFlags.Recursive
-                }
-            };
-            validateMatches(expected, json, caseSensitiveHost, caseSensitiveBasePath);
+                exclude: [
+                    "**/*"
+                ]
+            }, caseInsensitiveDottedFoldersHost, caseInsensitiveBasePath);
         });
     });
 
-    it("can include files in the same order on multiple platforms", () => {
-        function getExpected(basePath: string): ts.ParsedCommandLine {
-            return {
-                options: {},
-                errors: [],
-                fileNames: [
-                    `${basePath}Yosemite.ts`, // capital always comes before lowercase letters
-                    `${basePath}xylophone.ts`,
-                    `${basePath}zebra.ts`
-                ],
-                wildcardDirectories: {
-                    [basePath.slice(0, basePath.length - 1)]: ts.WatchDirectoryFlags.Recursive
-                },
-            };
-        }
-        const json = {};
-        validateMatches(getExpected(caseSensitiveBasePath), json, caseSensitiveOrderingDiffersWithCaseHost, caseSensitiveBasePath);
-        validateMatches(getExpected(caseInsensitiveBasePath), json, caseInsensitiveOrderingDiffersWithCaseHost, caseInsensitiveBasePath);
+    describe("exclude or include patterns which start with **", () => {
+        baselineMatches("can exclude dirs whose pattern starts with starstar", {
+            exclude: [
+                "**/x"
+            ]
+        }, caseSensitiveHost, caseSensitiveBasePath);
+        baselineMatches("can include dirs whose pattern starts with starstart", {
+            include: [
+                "**/x",
+                "**/a/**/b"
+            ]
+        }, caseSensitiveHost, caseSensitiveBasePath);
     });
 
-    it("when recursive symlinked directories are present", () => {
+    baselineMatches("can include files in the same order on multiple platforms case sensitive", {}, caseSensitiveOrderingDiffersWithCaseHost, caseSensitiveBasePath);
+    baselineMatches("can include files in the same order on multiple platforms case insensitive", {}, caseInsensitiveOrderingDiffersWithCaseHost, caseInsensitiveBasePath);
+
+    describe("when recursive symlinked directories are present", () => {
         const fs = new vfs.FileSystem(/*ignoreCase*/ true, {
             cwd: caseInsensitiveBasePath, files: {
                 "c:/dev/index.ts": ""
@@ -1529,16 +597,6 @@ describe("unittests:: config:: matchFiles", () => {
         fs.symlinkSync("c:/dev/a", "c:/dev/a/b/c/grandparent");
         const host = new fakes.ParseConfigHost(fs);
         const json = {};
-        const expected: ts.ParsedCommandLine = {
-            options: {},
-            errors: [],
-            fileNames: [
-                "c:/dev/index.ts"
-            ],
-            wildcardDirectories: {
-                "c:/dev": ts.WatchDirectoryFlags.Recursive
-            },
-        };
-        validateMatches(expected, json, host, caseInsensitiveBasePath);
+        baselineMatches("when recursive symlinked directories are present", json, host, caseInsensitiveBasePath);
     });
 });
diff --git a/src/testRunner/unittests/config/projectReferences.ts b/src/testRunner/unittests/config/projectReferences.ts
deleted file mode 100644
index e08d6d0f10475..0000000000000
--- a/src/testRunner/unittests/config/projectReferences.ts
+++ /dev/null
@@ -1,355 +0,0 @@
-import * as fakes from "../../_namespaces/fakes";
-import * as ts from "../../_namespaces/ts";
-import * as vfs from "../../_namespaces/vfs";
-import { libFile } from "../virtualFileSystemWithWatch";
-
-interface TestProjectSpecification {
-    configFileName?: string;
-    references?: readonly (string | ts.ProjectReference)[];
-    files: { [fileName: string]: string };
-    outputFiles?: { [fileName: string]: string };
-    config?: object;
-    options?: Partial<ts.CompilerOptions>;
-}
-interface TestSpecification {
-    [path: string]: TestProjectSpecification;
-}
-
-function assertHasError(message: string, errors: readonly ts.Diagnostic[], diag: ts.DiagnosticMessage) {
-    if (!errors.some(e => e.code === diag.code)) {
-        const errorString = errors.map(e => `    ${e.file ? e.file.fileName : "[global]"}: ${e.messageText}`).join("\r\n");
-        assert(false, `${message}: Did not find any diagnostic for ${diag.message} in:\r\n${errorString}`);
-    }
-}
-
-function assertNoErrors(message: string, errors: readonly ts.Diagnostic[]) {
-    if (errors && errors.length > 0) {
-        assert(false, `${message}: Expected no errors, but found:\r\n${errors.map(e => `    ${e.messageText}`).join("\r\n")}`);
-    }
-}
-
-function combineAllPaths(...paths: string[]) {
-    let result = paths[0];
-    for (let i = 1; i < paths.length; i++) {
-        result = ts.combinePaths(result, paths[i]);
-    }
-    return result;
-}
-
-const emptyModule = "export { };";
-
-/**
- * Produces the text of a source file which imports all of the
- * specified module names
- */
-function moduleImporting(...names: string[]) {
-    return names.map((n, i) => `import * as mod_${i} from ${n}`).join("\r\n");
-}
-
-function testProjectReferences(spec: TestSpecification, entryPointConfigFileName: string, checkResult: (prog: ts.Program, host: fakes.CompilerHost) => void) {
-    const files = new Map<string, string>();
-    for (const key in spec) {
-        const sp = spec[key];
-        const configFileName = combineAllPaths("/", key, sp.configFileName || "tsconfig.json");
-        const options = {
-            compilerOptions: {
-                composite: true,
-                outDir: "bin",
-                ...sp.options
-            },
-            references: (sp.references || []).map(r => {
-                if (typeof r === "string") {
-                    return { path: r };
-                }
-                return r;
-            }),
-            ...sp.config
-        };
-        const configContent = JSON.stringify(options);
-        const outDir = options.compilerOptions.outDir;
-        files.set(configFileName, configContent);
-        for (const sourceFile of Object.keys(sp.files)) {
-            files.set(sourceFile, sp.files[sourceFile]);
-        }
-        if (sp.outputFiles) {
-            for (const outFile of Object.keys(sp.outputFiles)) {
-                files.set(combineAllPaths("/", key, outDir, outFile), sp.outputFiles[outFile]);
-            }
-        }
-    }
-
-    const vfsys = new vfs.FileSystem(false, { files: { "/lib.d.ts": libFile.content } });
-    files.forEach((v, k) => {
-        vfsys.mkdirpSync(ts.getDirectoryPath(k));
-        vfsys.writeFileSync(k, v);
-    });
-    const host = new fakes.CompilerHost(new fakes.System(vfsys));
-
-    const { config, error } = ts.readConfigFile(entryPointConfigFileName, name => host.readFile(name));
-
-    // We shouldn't have any errors about invalid tsconfig files in these tests
-    assert(config && !error, ts.flattenDiagnosticMessageText(error && error.messageText, "\n"));
-    const file = ts.parseJsonConfigFileContent(config, ts.parseConfigHostFromCompilerHostLike(host), ts.getDirectoryPath(entryPointConfigFileName), {}, entryPointConfigFileName);
-    file.options.configFilePath = entryPointConfigFileName;
-    const prog = ts.createProgram({
-        rootNames: file.fileNames,
-        options: file.options,
-        host,
-        projectReferences: file.projectReferences
-    });
-    checkResult(prog, host);
-}
-
-describe("unittests:: config:: project-references meta check", () => {
-    it("default setup was created correctly", () => {
-        const spec: TestSpecification = {
-            "/primary": {
-                files: { "/primary/a.ts": emptyModule },
-                references: []
-            },
-            "/reference": {
-                files: { "/secondary/b.ts": moduleImporting("../primary/a") },
-                references: ["../primary"]
-            }
-        };
-        testProjectReferences(spec, "/primary/tsconfig.json", prog => {
-            assert.isTrue(!!prog, "Program should exist");
-            assertNoErrors("Sanity check should not produce errors", prog.getOptionsDiagnostics());
-        });
-    });
-});
-
-/**
- * Validate that we enforce the basic settings constraints for referenced projects
- */
-describe("unittests:: config:: project-references constraint checking for settings", () => {
-    it("errors when declaration = false", () => {
-        const spec: TestSpecification = {
-            "/primary": {
-                files: { "/primary/a.ts": emptyModule },
-                references: [],
-                options: {
-                    declaration: false
-                }
-            }
-        };
-
-        testProjectReferences(spec, "/primary/tsconfig.json", program => {
-            const errs = program.getOptionsDiagnostics();
-            assertHasError("Reports an error about the wrong decl setting", errs, ts.Diagnostics.Composite_projects_may_not_disable_declaration_emit);
-        });
-    });
-
-    it("errors when the referenced project doesn't have composite:true", () => {
-        const spec: TestSpecification = {
-            "/primary": {
-                files: { "/primary/a.ts": emptyModule },
-                references: [],
-                options: {
-                    composite: false
-                }
-            },
-            "/reference": {
-                files: { "/secondary/b.ts": moduleImporting("../primary/a") },
-                references: ["../primary"],
-                config: {
-                    files: ["b.ts"]
-                }
-            }
-        };
-        testProjectReferences(spec, "/reference/tsconfig.json", program => {
-            const errs = program.getOptionsDiagnostics();
-            assertHasError("Reports an error about 'composite' not being set", errs, ts.Diagnostics.Referenced_project_0_must_have_setting_composite_Colon_true);
-        });
-    });
-
-    it("does not error when the referenced project doesn't have composite:true if its a container project", () => {
-        const spec: TestSpecification = {
-            "/primary": {
-                files: { "/primary/a.ts": emptyModule },
-                references: [],
-                options: {
-                    composite: false
-                }
-            },
-            "/reference": {
-                files: { "/secondary/b.ts": moduleImporting("../primary/a") },
-                references: ["../primary"],
-            }
-        };
-        testProjectReferences(spec, "/reference/tsconfig.json", program => {
-            const errs = program.getOptionsDiagnostics();
-            assertNoErrors("Reports an error about 'composite' not being set", errs);
-        });
-    });
-
-    it("errors when the file list is not exhaustive", () => {
-        const spec: TestSpecification = {
-            "/primary": {
-                files: {
-                    "/primary/a.ts": "import * as b from './b'",
-                    "/primary/b.ts": "export {}"
-                },
-                config: {
-                    files: ["a.ts"]
-                }
-            }
-        };
-
-        testProjectReferences(spec, "/primary/tsconfig.json", program => {
-            const errs = program.getSemanticDiagnostics(program.getSourceFile("/primary/a.ts"));
-            assertHasError("Reports an error about b.ts not being in the list", errs, ts.Diagnostics.File_0_is_not_listed_within_the_file_list_of_project_1_Projects_must_list_all_files_or_use_an_include_pattern);
-        });
-    });
-
-    it("errors when the referenced project doesn't exist", () => {
-        const spec: TestSpecification = {
-            "/primary": {
-                files: { "/primary/a.ts": emptyModule },
-                references: ["../foo"]
-            }
-        };
-        testProjectReferences(spec, "/primary/tsconfig.json", program => {
-            const errs = program.getOptionsDiagnostics();
-            assertHasError("Reports an error about a missing file", errs, ts.Diagnostics.File_0_not_found);
-        });
-    });
-
-    it("errors when a prepended project reference doesn't set outFile", () => {
-        const spec: TestSpecification = {
-            "/primary": {
-                files: { "/primary/a.ts": emptyModule },
-                references: [{ path: "../someProj", prepend: true }]
-            },
-            "/someProj": {
-                files: { "/someProj/b.ts": "const x = 100;" }
-            }
-        };
-        testProjectReferences(spec, "/primary/tsconfig.json", program => {
-            const errs = program.getOptionsDiagnostics();
-            assertHasError("Reports an error about outFile not being set", errs, ts.Diagnostics.Cannot_prepend_project_0_because_it_does_not_have_outFile_set);
-        });
-    });
-
-    it("errors when a prepended project reference output doesn't exist", () => {
-        const spec: TestSpecification = {
-            "/primary": {
-                files: { "/primary/a.ts": "const y = x;" },
-                references: [{ path: "../someProj", prepend: true }]
-            },
-            "/someProj": {
-                files: { "/someProj/b.ts": "const x = 100;" },
-                options: { outFile: "foo.js" }
-            }
-        };
-        testProjectReferences(spec, "/primary/tsconfig.json", program => {
-            const errs = program.getOptionsDiagnostics();
-            assertHasError("Reports an error about outFile being missing", errs, ts.Diagnostics.Output_file_0_from_project_1_does_not_exist);
-        });
-    });
-});
-
-/**
- * Path mapping behavior
- */
-describe("unittests:: config:: project-references path mapping", () => {
-    it("redirects to the output .d.ts file", () => {
-        const spec: TestSpecification = {
-            "/alpha": {
-                files: { "/alpha/a.ts": "export const m: number = 3;" },
-                references: [],
-                outputFiles: { "a.d.ts": emptyModule }
-            },
-            "/beta": {
-                files: { "/beta/b.ts": "import { m } from '../alpha/a'" },
-                references: ["../alpha"]
-            }
-        };
-        testProjectReferences(spec, "/beta/tsconfig.json", program => {
-            assertNoErrors("File setup should be correct", program.getOptionsDiagnostics());
-            assertHasError("Found a type error", program.getSemanticDiagnostics(), ts.Diagnostics.Module_0_has_no_exported_member_1);
-        });
-    });
-});
-
-describe("unittests:: config:: project-references nice-behavior", () => {
-    it("issues a nice error when the input file is missing", () => {
-        const spec: TestSpecification = {
-            "/alpha": {
-                files: { "/alpha/a.ts": "export const m: number = 3;" },
-                references: []
-            },
-            "/beta": {
-                files: { "/beta/b.ts": "import { m } from '../alpha/a'" },
-                references: ["../alpha"]
-            }
-        };
-        testProjectReferences(spec, "/beta/tsconfig.json", program => {
-            assertHasError("Issues a useful error", program.getSemanticDiagnostics(), ts.Diagnostics.Output_file_0_has_not_been_built_from_source_file_1);
-        });
-    });
-
-    it("issues a nice error when the input file is missing when module reference is not relative", () => {
-        const spec: TestSpecification = {
-            "/alpha": {
-                files: { "/alpha/a.ts": "export const m: number = 3;" },
-                references: []
-            },
-            "/beta": {
-                files: { "/beta/b.ts": "import { m } from '@alpha/a'" },
-                references: ["../alpha"],
-                options: {
-                    baseUrl: "./",
-                    paths: {
-                        "@alpha/*": ["/alpha/*"]
-                    }
-                }
-            }
-        };
-        testProjectReferences(spec, "/beta/tsconfig.json", program => {
-            assertHasError("Issues a useful error", program.getSemanticDiagnostics(), ts.Diagnostics.Output_file_0_has_not_been_built_from_source_file_1);
-        });
-    });
-});
-
-/**
- * 'composite' behavior
- */
-describe("unittests:: config:: project-references behavior changes under composite: true", () => {
-    it("doesn't infer the rootDir from source paths", () => {
-        const spec: TestSpecification = {
-            "/alpha": {
-                files: { "/alpha/src/a.ts": "export const m: number = 3;" },
-                options: {
-                    declaration: true,
-                    outDir: "bin"
-                },
-                references: []
-            }
-        };
-        testProjectReferences(spec, "/alpha/tsconfig.json", (program, host) => {
-            program.emit();
-            assert.deepEqual(host.outputs.map(e => e.file).sort(), ["/alpha/bin/src/a.d.ts", "/alpha/bin/src/a.js", "/alpha/bin/tsconfig.tsbuildinfo"]);
-        });
-    });
-});
-
-describe("unittests:: config:: project-references errors when a file in a composite project occurs outside the root", () => {
-    it("Errors when a file is outside the rootdir", () => {
-        const spec: TestSpecification = {
-            "/alpha": {
-                files: { "/alpha/src/a.ts": "import * from '../../beta/b'", "/beta/b.ts": "export { }" },
-                options: {
-                    declaration: true,
-                    outDir: "bin"
-                },
-                references: []
-            }
-        };
-        testProjectReferences(spec, "/alpha/tsconfig.json", (program) => {
-            const semanticDiagnostics = program.getSemanticDiagnostics(program.getSourceFile("/alpha/src/a.ts"));
-            assertHasError("Issues an error about the rootDir", semanticDiagnostics, ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files);
-            assertHasError("Issues an error about the fileList", semanticDiagnostics, ts.Diagnostics.File_0_is_not_listed_within_the_file_list_of_project_1_Projects_must_list_all_files_or_use_an_include_pattern);
-        });
-    });
-});
diff --git a/src/testRunner/unittests/config/tsconfigParsing.ts b/src/testRunner/unittests/config/tsconfigParsing.ts
index db2a21c9e22f3..136fbb3a0b0e8 100644
--- a/src/testRunner/unittests/config/tsconfigParsing.ts
+++ b/src/testRunner/unittests/config/tsconfigParsing.ts
@@ -1,268 +1,224 @@
 import * as fakes from "../../_namespaces/fakes";
+import * as Harness from "../../_namespaces/Harness";
 import * as ts from "../../_namespaces/ts";
 import * as vfs from "../../_namespaces/vfs";
+import { baselineParseConfig } from "./helpers";
 
 describe("unittests:: config:: tsconfigParsing:: parseConfigFileTextToJson", () => {
-    function assertParseResult(jsonText: string, expectedConfigObject: { config?: any; error?: ts.Diagnostic[] }) {
-        const parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
-        assert.equal(JSON.stringify(parsed), JSON.stringify(expectedConfigObject));
+    function formatErrors(errors: readonly ts.Diagnostic[]) {
+        return ts.formatDiagnosticsWithColorAndContext(errors, {
+            getCurrentDirectory: () => "/",
+            getCanonicalFileName: ts.identity,
+            getNewLine: () => "\n",
+        });
     }
-
-    function assertParseErrorWithExcludesKeyword(jsonText: string) {
-        {
-            const parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
-            const parsedCommand = ts.parseJsonConfigFileContent(parsed.config, ts.sys, "tests/cases/unittests");
-            assert.isTrue(parsedCommand.errors && parsedCommand.errors.length === 1 &&
-                parsedCommand.errors[0].code === ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude.code);
-        }
-        {
-            const parsed = ts.parseJsonText("/apath/tsconfig.json", jsonText);
-            const parsedCommand = ts.parseJsonSourceFileConfigFileContent(parsed, ts.sys, "tests/cases/unittests");
-            assert.isTrue(parsedCommand.errors && parsedCommand.errors.length === 1 &&
-                parsedCommand.errors[0].code === ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude.code);
-        }
-    }
-
-    function getParsedCommandJson(jsonText: string, configFileName: string, basePath: string, allFileList: string[]) {
-        const parsed = ts.parseConfigFileTextToJson(configFileName, jsonText);
-        const files = allFileList.reduce((files, value) => (files[value] = "", files), {} as vfs.FileSet);
-        const host: ts.ParseConfigHost = new fakes.ParseConfigHost(new vfs.FileSystem(/*ignoreCase*/ false, { cwd: basePath, files: { "/": {}, ...files } }));
-        return ts.parseJsonConfigFileContent(parsed.config, host, basePath, /*existingOptions*/ undefined, configFileName);
-    }
-
-    function getParsedCommandJsonNode(jsonText: string, configFileName: string, basePath: string, allFileList: string[]) {
-        const parsed = ts.parseJsonText(configFileName, jsonText);
-        const files = allFileList.reduce((files, value) => (files[value] = "", files), {} as vfs.FileSet);
-        const host: ts.ParseConfigHost = new fakes.ParseConfigHost(new vfs.FileSystem(/*ignoreCase*/ false, { cwd: basePath, files: { "/": {}, ...files } }));
-        return ts.parseJsonSourceFileConfigFileContent(parsed, host, basePath, /*existingOptions*/ undefined, configFileName);
-    }
-
-    function assertParseFileList(jsonText: string, configFileName: string, basePath: string, allFileList: string[], expectedFileList: string[]) {
-        {
-            const parsed = getParsedCommandJson(jsonText, configFileName, basePath, allFileList);
-            assert.isTrue(ts.arrayIsEqualTo(parsed.fileNames.sort(), expectedFileList.sort()));
-        }
-        {
-            const parsed = getParsedCommandJsonNode(jsonText, configFileName, basePath, allFileList);
-            assert.isTrue(ts.arrayIsEqualTo(parsed.fileNames.sort(), expectedFileList.sort()));
-        }
-    }
-
-    function assertParseFileDiagnostics(jsonText: string, configFileName: string, basePath: string, allFileList: string[], expectedDiagnosticCode: number, noLocation?: boolean) {
-        {
-            const parsed = getParsedCommandJson(jsonText, configFileName, basePath, allFileList);
-            assert.isTrue(parsed.errors.length >= 0);
-            assert.isTrue(parsed.errors.filter(e => e.code === expectedDiagnosticCode).length > 0, `Expected error code ${expectedDiagnosticCode} to be in ${JSON.stringify(parsed.errors)}`);
-        }
-        {
-            const parsed = getParsedCommandJsonNode(jsonText, configFileName, basePath, allFileList);
-            assert.isTrue(parsed.errors.length >= 0);
-            assert.isTrue(parsed.errors.filter(e => e.code === expectedDiagnosticCode).length > 0, `Expected error code ${expectedDiagnosticCode} to be in ${JSON.stringify(parsed.errors)}`);
-            if (!noLocation) {
-                assert.isTrue(parsed.errors.filter(e => e.code === expectedDiagnosticCode && e.file && e.start && e.length).length > 0, `Expected error code ${expectedDiagnosticCode} to be in ${JSON.stringify(parsed.errors)} with location information`);
+    function baselineParseResult(name: string, jsonTexts: () => string[]) {
+        it(name, () => {
+            const baseline: string[] = [];
+            for (const jsonText of jsonTexts()) {
+                baseline.push("Input::", jsonText);
+                const parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
+                baseline.push("Config::", JSON.stringify(parsed.config, /*replacer*/ undefined, " "));
+                baseline.push("Errors::");
+                baseline.push(formatErrors(parsed.error ? [parsed.error] : ts.emptyArray));
+                baseline.push("");
             }
-        }
+            Harness.Baseline.runBaseline(`config/tsconfigParsing/${name} jsonParse.js`, baseline.join("\n"));
+        });
     }
 
-    function assertParseFileDiagnosticsExclusion(jsonText: string, configFileName: string, basePath: string, allFileList: string[], expectedExcludedDiagnosticCode: number) {
-        {
-            const parsed = getParsedCommandJson(jsonText, configFileName, basePath, allFileList);
-            assert.isTrue(parsed.errors.length >= 0);
-            assert.isTrue(parsed.errors.findIndex(e => e.code === expectedExcludedDiagnosticCode) === -1, `Expected error code ${expectedExcludedDiagnosticCode} to not be in ${JSON.stringify(parsed.errors)}`);
-        }
-        {
-            const parsed = getParsedCommandJsonNode(jsonText, configFileName, basePath, allFileList);
-            assert.isTrue(parsed.errors.length >= 0);
-            assert.isTrue(parsed.errors.findIndex(e => e.code === expectedExcludedDiagnosticCode) === -1, `Expected error code ${expectedExcludedDiagnosticCode} to not be in ${JSON.stringify(parsed.errors)}`);
-        }
+    interface VerifyConfig {
+        jsonText: string;
+        configFileName: string;
+        basePath: string;
+        allFileList: string[];
     }
 
-    it("returns empty config for file with only whitespaces", () => {
-        assertParseResult("", { config : {} });
-        assertParseResult(" ", { config : {} });
-    });
-
-    it("returns empty config for file with comments only", () => {
-        assertParseResult("// Comment", { config: {} });
-        assertParseResult("/* Comment*/", { config: {} });
-    });
-
-    it("returns empty config when config is empty object", () => {
-        assertParseResult("{}", { config: {} });
-    });
-
-    it("returns config object without comments", () => {
-        assertParseResult(
-            `{ // Excluded files
-                    "exclude": [
-                        // Exclude d.ts
-                        "file.d.ts"
-                    ]
-                }`, { config: { exclude: ["file.d.ts"] } });
-
-        assertParseResult(
-            `{
-                    /* Excluded
-                         Files
-                    */
-                    "exclude": [
-                        /* multiline comments can be in the middle of a line */"file.d.ts"
-                    ]
-                }`, { config: { exclude: ["file.d.ts"] } });
-    });
-
-    it("keeps string content untouched", () => {
-        assertParseResult(
-            `{
-                    "exclude": [
-                        "xx//file.d.ts"
-                    ]
-                }`, { config: { exclude: ["xx//file.d.ts"] } });
-        assertParseResult(
-            `{
-                    "exclude": [
-                        "xx/*file.d.ts*/"
-                    ]
-                }`, { config: { exclude: ["xx/*file.d.ts*/"] } });
-    });
-
-    it("handles escaped characters in strings correctly", () => {
-        assertParseResult(
-            `{
-                    "exclude": [
-                        "xx\\"//files"
-                    ]
-                }`, { config: { exclude: ["xx\"//files"] } });
+    function baselinedParsed(subScenario: string, scenario: () => VerifyConfig[], skipJson?: true) {
+        baselineParseConfig({
+            scenario: "tsconfigParsing",
+            subScenario,
+            input: () => scenario().map(({ jsonText, configFileName, basePath, allFileList }) => ({
+                createHost: () => {
+                    const files = allFileList.reduce((files, value) => (files[value] = "", files), {} as vfs.FileSet);
+                    files[ts.combinePaths(basePath, configFileName)] = jsonText;
+                    return new fakes.ParseConfigHost(new vfs.FileSystem(
+                        /*ignoreCase*/ false,
+                        {
+                            cwd: basePath,
+                            files: { "/": {}, ...files }
+                        }));
+                },
+                jsonText,
+                configFileName,
+                basePath,
+                baselineParsed: (baseline, parsed) => {
+                    baseline.push("FileNames::");
+                    baseline.push(parsed.fileNames.join());
+                },
+            })),
+            skipJson
+        });
+    }
 
-        assertParseResult(
-            `{
-                    "exclude": [
-                        "xx\\\\" // end of line comment
-                    ]
-                }`, { config: { exclude: ["xx\\"] } });
-    });
+    baselineParseResult("returns empty config for file with only whitespaces", () => [
+        "",
+        " ",
+    ]);
+
+    baselineParseResult("returns empty config for file with comments only", () => [
+        "// Comment",
+        "/* Comment*/",
+    ]);
+
+    baselineParseResult("returns empty config when config is empty object", () => [
+        "{}"
+    ]);
+
+    baselineParseResult("returns config object without comments", () => [
+        `{ // Excluded files
+            "exclude": [
+                // Exclude d.ts
+                "file.d.ts"
+            ]
+        }`,
+        `{
+            /* Excluded
+                    Files
+            */
+            "exclude": [
+                /* multiline comments can be in the middle of a line */"file.d.ts"
+            ]
+        }`,
+    ]);
+
+    baselineParseResult("keeps string content untouched", () => [
+        `{
+            "exclude": [
+                "xx//file.d.ts"
+            ]
+        }`,
+        `{
+            "exclude": [
+                "xx/*file.d.ts*/"
+            ]
+        }`,
+    ]);
 
-    it("returns object with error when json is invalid", () => {
-        const parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", "invalid");
-        assert.deepEqual(parsed.config, {});
-        const expected = ts.createCompilerDiagnostic(ts.Diagnostics._0_expected, "{");
-        const error = parsed.error!;
-        assert.equal(error.messageText, expected.messageText);
-        assert.equal(error.category, expected.category);
-        assert.equal(error.code, expected.code);
-        assert.equal(error.start, 0);
-        assert.equal(error.length, "invalid".length);
-    });
+    baselineParseResult("handles escaped characters in strings correctly", () => [
+        `{
+            "exclude": [
+                "xx\\"//files"
+            ]
+        }`,
+        `{
+            "exclude": [
+                "xx\\\\" // end of line comment
+            ]
+        }`,
+    ]);
 
-    it("returns object when users correctly specify library", () => {
-        assertParseResult(
-            `{
-                    "compilerOptions": {
-                        "lib": ["es5"]
-                    }
-                }`, {
-                config: { compilerOptions: { lib: ["es5"] } }
-            });
+    baselineParseResult("returns object with error when json is invalid", () => [
+        "invalid",
+    ]);
 
-        assertParseResult(
-            `{
-                    "compilerOptions": {
-                        "lib": ["es5", "es6"]
-                    }
-                }`, {
-                config: { compilerOptions: { lib: ["es5", "es6"] } }
-            });
-    });
+    baselineParseResult("returns object when users correctly specify library", () => [
+        `{
+            "compilerOptions": {
+                "lib": ["es5"]
+            }
+        }`,
+        `{
+            "compilerOptions": {
+                "lib": ["es5", "es6"]
+            }
+        }`,
+    ]);
 
-    it("returns error when tsconfig have excludes", () => {
-        assertParseErrorWithExcludesKeyword(
-            `{
+    baselinedParsed("returns error when tsconfig have excludes", () => [{
+        jsonText: `{
                     "compilerOptions": {
                         "lib": ["es5"]
                     },
                     "excludes": [
                         "foge.ts"
                     ]
-                }`);
-    });
-
-    it("ignore dotted files and folders", () => {
-        assertParseFileList(
-            `{}`,
-            "tsconfig.json",
-            "/apath",
-            ["/apath/test.ts", "/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"],
-            ["/apath/test.ts"]
-        );
-    });
-
-    it("allow dotted files and folders when explicitly requested", () => {
-        assertParseFileList(
-            `{
+                }`,
+        configFileName: "tsconfig.json",
+        basePath: "/apath",
+        allFileList: ["/apath/test.ts", "/apath/foge.ts"],
+    }]);
+
+    baselinedParsed("ignore dotted files and folders", () => [{
+        jsonText: `{}`,
+        configFileName: "tsconfig.json",
+        basePath: "/apath",
+        allFileList: ["/apath/test.ts", "/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"],
+    }]);
+
+    baselinedParsed("allow dotted files and folders when explicitly requested", () => [{
+        jsonText: `{
                     "files": ["/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"]
                 }`,
-            "tsconfig.json",
-            "/apath",
-            ["/apath/test.ts", "/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"],
-            ["/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"]
-        );
-    });
+        configFileName: "tsconfig.json",
+        basePath: "/apath",
+        allFileList: ["/apath/test.ts", "/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"],
+    }]);
 
-    it("exclude outDir unless overridden", () => {
+    baselinedParsed("exclude outDir unless overridden", () => {
         const tsconfigWithoutExclude =
-        `{
+            `{
                 "compilerOptions": {
                     "outDir": "bin"
                 }
             }`;
         const tsconfigWithExclude =
-        `{
+            `{
                 "compilerOptions": {
                     "outDir": "bin"
                 },
                 "exclude": [ "obj" ]
             }`;
-        const rootDir = "/";
-        const allFiles = ["/bin/a.ts", "/b.ts"];
-        const expectedFiles = ["/b.ts"];
-        assertParseFileList(tsconfigWithoutExclude, "tsconfig.json", rootDir, allFiles, expectedFiles);
-        assertParseFileList(tsconfigWithExclude, "tsconfig.json", rootDir, allFiles, allFiles);
+        const basePath = "/";
+        const allFileList = ["/bin/a.ts", "/b.ts"];
+        return [
+            { jsonText: tsconfigWithoutExclude, configFileName: "tsconfig.json", basePath, allFileList },
+            { jsonText: tsconfigWithExclude, configFileName: "tsconfig.json", basePath, allFileList },
+        ];
     });
 
-    it("exclude declarationDir unless overridden", () => {
+    baselinedParsed("exclude declarationDir unless overridden", () => {
         const tsconfigWithoutExclude =
-        `{
+            `{
                 "compilerOptions": {
                     "declarationDir": "declarations"
                 }
             }`;
         const tsconfigWithExclude =
-        `{
+            `{
                 "compilerOptions": {
                     "declarationDir": "declarations"
                 },
                 "exclude": [ "types" ]
             }`;
 
-        const rootDir = "/";
-        const allFiles = ["/declarations/a.d.ts", "/a.ts"];
-        const expectedFiles = ["/a.ts"];
-
-        assertParseFileList(tsconfigWithoutExclude, "tsconfig.json", rootDir, allFiles, expectedFiles);
-        assertParseFileList(tsconfigWithExclude, "tsconfig.json", rootDir, allFiles, allFiles);
+        const basePath = "/";
+        const allFileList = ["/declarations/a.d.ts", "/a.ts"];
+        return [
+            { jsonText: tsconfigWithoutExclude, configFileName: "tsconfig.json", basePath, allFileList },
+            { jsonText: tsconfigWithExclude, configFileName: "tsconfig.json", basePath, allFileList },
+        ];
     });
 
-    it("implicitly exclude common package folders", () => {
-        assertParseFileList(
-            `{}`,
-            "tsconfig.json",
-            "/",
-            ["/node_modules/a.ts", "/bower_components/b.ts", "/jspm_packages/c.ts", "/d.ts", "/folder/e.ts"],
-            ["/d.ts", "/folder/e.ts"]
-        );
-    });
+    baselinedParsed("implicitly exclude common package folders", () => [{
+        jsonText: `{}`,
+        configFileName: "tsconfig.json",
+        basePath: "/",
+        allFileList: ["/node_modules/a.ts", "/bower_components/b.ts", "/jspm_packages/c.ts", "/d.ts", "/folder/e.ts"],
+    }]);
 
     it("parse and re-emit tsconfig.json file with diagnostics", () => {
+        const baseline: string[] = [];
         const content = `{
                 "compilerOptions": {
                     "allowJs": true
@@ -271,166 +227,157 @@ describe("unittests:: config:: tsconfigParsing:: parseConfigFileTextToJson", ()
                 }
                 "files": ["file1.ts"]
             }`;
+        baseline.push("Initial::", content);
         const result = ts.parseJsonText("config.json", content);
-        const diagnostics = result.parseDiagnostics;
-        const configJsonObject = ts.convertToObject(result, diagnostics);
-        const expectedResult = {
-            compilerOptions: {
-                allowJs: true,
-                outDir: "bin"
-            },
-            files: ["file1.ts"]
-        };
-        assert.isTrue(diagnostics.length === 2);
-        assert.equal(JSON.stringify(configJsonObject), JSON.stringify(expectedResult));
+        const configJsonObject = ts.convertToObject(result, result.parseDiagnostics);
+        baseline.push("Result::", JSON.stringify(configJsonObject, undefined, " "));
+        baseline.push("Errors::", formatErrors(result.parseDiagnostics));
+        Harness.Baseline.runBaseline(`config/tsconfigParsing/parse and re-emit tsconfig.json file with diagnostics.js`, baseline.join("\n"));
     });
 
-    it("generates errors for empty files list", () => {
-        const content = `{
+    baselinedParsed("generates errors for empty files list", () => [{
+        jsonText: `{
                 "files": []
-            }`;
-        assertParseFileDiagnostics(content,
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            ["/apath/a.ts"],
-            ts.Diagnostics.The_files_list_in_config_file_0_is_empty.code);
-    });
-
-    it("generates errors for empty files list when no references are provided", () => {
-        const content = `{
+            }`,
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.ts"],
+    }]);
+
+    baselinedParsed("generates errors for empty files list when no references are provided", () => [{
+        jsonText: `{
                 "files": [],
                 "references": []
-            }`;
-        assertParseFileDiagnostics(content,
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            ["/apath/a.ts"],
-            ts.Diagnostics.The_files_list_in_config_file_0_is_empty.code);
-    });
-
-    it("does not generate errors for empty files list when one or more references are provided", () => {
-        const content = `{
+            }`,
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.ts"],
+    }]);
+
+    baselinedParsed("does not generate errors for empty files list when one or more references are provided", () => [{
+        jsonText: `{
                 "files": [],
                 "references": [{ "path": "/apath" }]
-            }`;
-        assertParseFileDiagnosticsExclusion(content,
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            ["/apath/a.ts"],
-            ts.Diagnostics.The_files_list_in_config_file_0_is_empty.code);
-    });
-
-    it("generates errors for directory with no .ts files", () => {
-        const content = `{
-            }`;
-        assertParseFileDiagnostics(content,
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            ["/apath/a.js"],
-            ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code,
-            /*noLocation*/ true);
-    });
-
-    it("generates errors for empty directory", () => {
-        const content = `{
+            }`,
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.ts"],
+    }]);
+
+    baselinedParsed("generates errors for directory with no .ts files", () => [{
+        jsonText: `{
+            }`,
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.js"],
+    }]);
+
+    baselinedParsed("generates errors for empty directory", () => [{
+        jsonText: `{
                 "compilerOptions": {
                     "allowJs": true
                 }
-            }`;
-        assertParseFileDiagnostics(content,
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            [],
-            ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code,
-            /*noLocation*/ true);
-    });
-
-    it("generates errors for empty include", () => {
-        const content = `{
+            }`,
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: [],
+    }]);
+
+    baselinedParsed("generates errors for empty include", () => [{
+        jsonText: `{
                 "include": []
-            }`;
-        assertParseFileDiagnostics(content,
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            ["/apath/a.ts"],
-            ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code,
-            /*noLocation*/ true);
-    });
-
-    it("generates errors for includes with outDir", () => {
-        const content = `{
+            }`,
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.ts"],
+    }]);
+
+    baselinedParsed("generates errors for includes with outDir", () => [{
+        jsonText: `{
                 "compilerOptions": {
                     "outDir": "./"
                 },
                 "include": ["**/*"]
-            }`;
-        assertParseFileDiagnostics(content,
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            ["/apath/a.ts"],
-            ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code,
-            /*noLocation*/ true);
-    });
-
-
-    it("generates errors for when invalid comment type present in tsconfig", () => {
-        const jsonText = `{
+            }`,
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.ts"],
+    }]);
+
+    baselinedParsed("generates errors for when invalid comment type present in tsconfig", () => [{
+        jsonText: `{
               "compilerOptions": {
                 ## this comment does cause issues
                 "types" : [
                 ]
               }
-            }`;
-        const parsed = getParsedCommandJsonNode(jsonText, "/apath/tsconfig.json", "tests/cases/unittests", ["/apath/a.ts"]);
-        assert.isTrue(parsed.errors.length >= 0);
-    });
-
-    it("generates errors when files is not string", () => {
-        assertParseFileDiagnostics(
-            JSON.stringify({
-                files: [{
-                    compilerOptions: {
-                        experimentalDecorators: true,
-                        allowJs: true
-                    }
-                }]
-            }),
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            ["/apath/a.ts"],
-            ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1.code,
-            /*noLocation*/ true);
-    });
-
-    it("generates errors when include is not string", () => {
-        assertParseFileDiagnostics(
-            JSON.stringify({
-                include: [
-                    ["./**/*.ts"]
-                ]
-            }),
-            "/apath/tsconfig.json",
-            "tests/cases/unittests",
-            ["/apath/a.ts"],
-            ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1.code,
-            /*noLocation*/ true);
-    });
+            }`,
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.ts"],
+    }], /*skipJson*/ true);
+
+    baselinedParsed("generates errors when files is not string", () => [{
+        jsonText: JSON.stringify({
+            files: [{
+                compilerOptions: {
+                    experimentalDecorators: true,
+                    allowJs: true
+                }
+            }]
+        }),
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.ts"],
+    }]);
+
+    baselinedParsed("generates errors when include is not string", () => [{
+        jsonText: JSON.stringify({
+            include: [
+                ["./**/*.ts"]
+            ]
+        }),
+        configFileName: "/apath/tsconfig.json",
+        basePath: "tests/cases/unittests",
+        allFileList: ["/apath/a.ts"],
+    }]);
+
+    function baselineWildcards(subScenario: string, scenario: () => { configFileName: string, jsonText: string, basePath: string }[]) {
+        baselineParseConfig({
+            scenario: "tsconfigParsing",
+            subScenario,
+            input: () => scenario().map(({ jsonText, configFileName, basePath }) => ({
+                createHost: () => new fakes.ParseConfigHost(new vfs.FileSystem(/*ignoreCase*/ false, {
+                    cwd: basePath,
+                    files: { [configFileName]: jsonText }
+                })),
+                jsonText,
+                configFileName,
+                basePath,
+                baselineParsed: (baseline, parsed) => {
+                    baseline.push("Wildcards::");
+                    ts.getOwnKeys(parsed.wildcardDirectories!).forEach(dir =>
+                        baseline.push(`${dir}: WatchDirectoryFlags.${(ts as any).WatchDirectoryFlags[parsed.wildcardDirectories![dir]]}`)
+                    );
+                },
+            })),
+            skipErrors: true,
+        });
+    }
 
-    it("parses wildcard directories even when parent directories have dots", () => {
-        const parsed = ts.parseConfigFileTextToJson("/foo.bar/tsconfig.json", JSON.stringify({
+    baselineWildcards("parses wildcard directories even when parent directories have dots", () => [{
+        configFileName: "/foo.bar/tsconfig.json",
+        jsonText: JSON.stringify({
             include: ["src"]
-        }));
+        }),
+        basePath: "/foo.bar",
+    }]);
 
-        const parsedCommand = ts.parseJsonConfigFileContent(parsed.config, ts.sys, "/foo.bar");
-        assert.deepEqual(parsedCommand.wildcardDirectories, { "/foo.bar/src": ts.WatchDirectoryFlags.Recursive });
-    });
-
-    it("correctly parses wild card directories from implicit glob when two keys differ only in directory seperator", () => {
-        const parsed = ts.parseConfigFileTextToJson("/foo.bar/tsconfig.json", JSON.stringify({
+    baselineWildcards("correctly parses wild card directories from implicit glob when two keys differ only in directory seperator", () => [{
+        configFileName: "/foo.bar/tsconfig.json",
+        jsonText: JSON.stringify({
             include: ["./", "./**/*.json"]
-        }));
-
-        const parsedCommand = ts.parseJsonConfigFileContent(parsed.config, ts.sys, "/foo");
-        assert.deepEqual(parsedCommand.wildcardDirectories, { "/foo": ts.WatchDirectoryFlags.Recursive });
-    });
+        }),
+        basePath: "/foo",
+    }]);
 });
diff --git a/src/testRunner/unittests/config/tsconfigParsingWatchOptions.ts b/src/testRunner/unittests/config/tsconfigParsingWatchOptions.ts
index fd476c1748aab..e87053dd5f546 100644
--- a/src/testRunner/unittests/config/tsconfigParsingWatchOptions.ts
+++ b/src/testRunner/unittests/config/tsconfigParsingWatchOptions.ts
@@ -1,49 +1,9 @@
 import * as fakes from "../../_namespaces/fakes";
-import * as Harness from "../../_namespaces/Harness";
 import * as ts from "../../_namespaces/ts";
 import * as vfs from "../../_namespaces/vfs";
+import { baselineParseConfig } from "./helpers";
 
 describe("unittests:: config:: tsconfigParsingWatchOptions:: parseConfigFileTextToJson", () => {
-    function createParseConfigHost(additionalFiles?: vfs.FileSet) {
-        return new fakes.ParseConfigHost(
-            new vfs.FileSystem(
-                /*ignoreCase*/ false,
-                {
-                    cwd: "/",
-                    files: { "/": {}, "/a.ts": "", ...additionalFiles }
-                }
-            )
-        );
-    }
-    function getParsedCommandJson(json: object, additionalFiles?: vfs.FileSet, existingWatchOptions?: ts.WatchOptions) {
-        return ts.parseJsonConfigFileContent(
-            json,
-            createParseConfigHost(additionalFiles),
-            "/",
-            /*existingOptions*/ undefined,
-            "tsconfig.json",
-            /*resolutionStack*/ undefined,
-            /*extraFileExtensions*/ undefined,
-            /*extendedConfigCache*/ undefined,
-            existingWatchOptions,
-        );
-    }
-
-    function getParsedCommandJsonNode(json: object, additionalFiles?: vfs.FileSet, existingWatchOptions?: ts.WatchOptions) {
-        const parsed = ts.parseJsonText("tsconfig.json", JSON.stringify(json));
-        return ts.parseJsonSourceFileConfigFileContent(
-            parsed,
-            createParseConfigHost(additionalFiles),
-            "/",
-            /*existingOptions*/ undefined,
-            "tsconfig.json",
-            /*resolutionStack*/ undefined,
-            /*extraFileExtensions*/ undefined,
-            /*extendedConfigCache*/ undefined,
-            existingWatchOptions,
-        );
-    }
-
     interface VerifyWatchOptions {
         json: object;
         additionalFiles?: vfs.FileSet;
@@ -51,37 +11,35 @@ describe("unittests:: config:: tsconfigParsingWatchOptions:: parseConfigFileText
     }
 
     function verifyWatchOptions(subScenario: string, scenario: () => VerifyWatchOptions[]) {
-        describe(subScenario, () => {
-            it("with json api", () => {
-                const baseline: string[] = [];
-                for (const { json, additionalFiles, existingWatchOptions } of scenario()) {
-                    addToBaseLine(baseline, json, getParsedCommandJson(json, additionalFiles, existingWatchOptions));
-                }
-                runBaseline(`${subScenario} with json api`, baseline);
-            });
-
-            it("with json source file api", () => {
-                const baseline: string[] = [];
-                for (const { json, additionalFiles, existingWatchOptions, } of scenario()) {
-                    addToBaseLine(baseline, json, getParsedCommandJsonNode(json, additionalFiles, existingWatchOptions));
-                }
-                runBaseline(`${subScenario} with jsonSourceFile api`, baseline);
-            });
+        baselineParseConfig({
+            scenario: "tsconfigParsingWatchOptions",
+            subScenario,
+            input: () => scenario().map(({ json, additionalFiles, existingWatchOptions }) => {
+                const jsonText = JSON.stringify(json, undefined, " ");
+                return {
+                    createHost: () => new fakes.ParseConfigHost(
+                        new vfs.FileSystem(
+                            /*ignoreCase*/ false,
+                            {
+                                cwd: "/",
+                                files: {
+                                    "/a.ts": "",
+                                    ...additionalFiles,
+                                    "/tsconfig.json": jsonText,
+                                }
+                            }
+                        )
+                    ),
+                    jsonText,
+                    configFileName: "tsconfig.json",
+                    existingWatchOptions,
+                    baselineParsed: (baseline, parsed) => {
+                        baseline.push(`Result: WatchOptions::`);
+                        baseline.push(JSON.stringify(parsed.watchOptions, undefined, " "));
+                    },
+                };
+            }),
         });
-        function addToBaseLine(baseline: string[], json: object, parsed: ts.ParsedCommandLine) {
-            baseline.push(`Input:: ${JSON.stringify(json, /*replacer*/ undefined, " ")}`);
-            baseline.push(`Result: WatchOptions::`);
-            baseline.push(JSON.stringify(parsed.watchOptions, /*replacer*/ undefined, " "));
-            baseline.push(`Result: Errors::`);
-            baseline.push(ts.formatDiagnosticsWithColorAndContext(parsed.errors, {
-                getCurrentDirectory: () => "/",
-                getCanonicalFileName: ts.identity,
-                getNewLine: () => "\n"
-            }));
-        }
-        function runBaseline(subScenario: string, baseline: readonly string[]) {
-            Harness.Baseline.runBaseline(`config/tsconfigParsingWatchOptions/${subScenario}.js`, baseline.join("\n"));
-        }
     }
 
     verifyWatchOptions("no watchOptions specified option", () => [{
diff --git a/src/testRunner/unittests/tsc/projectReferencesConfig.ts b/src/testRunner/unittests/tsc/projectReferencesConfig.ts
new file mode 100644
index 0000000000000..17b26e892859e
--- /dev/null
+++ b/src/testRunner/unittests/tsc/projectReferencesConfig.ts
@@ -0,0 +1,253 @@
+import * as ts from "../../_namespaces/ts";
+import { loadProjectFromFiles, verifyTsc } from "./helpers";
+
+function emptyModule() {
+    return "export { };";
+}
+
+/**
+ * Produces the text of a source file which imports all of the
+ * specified module names
+ */
+function moduleImporting(...names: string[]) {
+    return names.map((n, i) => `import * as mod_${i} from "${n}"`).join("\r\n");
+}
+
+function getConfig({ references, options, config }: {
+    references?: (string | ts.ProjectReference)[];
+    options?: ts.CompilerOptions;
+    config?: object
+} = {}) {
+    return JSON.stringify({
+        compilerOptions: {
+            composite: true,
+            outDir: "bin",
+            ...options
+        },
+        references: references?.map(r => {
+            if (typeof r === "string") {
+                return { path: r };
+            }
+            return r;
+        }) || [],
+        ...config,
+    }, undefined, " ");
+}
+
+describe("unittests:: config:: project-references meta check", () => {
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "default setup was created correctly",
+        fs: () => loadProjectFromFiles({
+            "/primary/tsconfig.json": getConfig(),
+            "/primary/a.ts": emptyModule(),
+            "/secondary/tsconfig.json": getConfig({
+                references: ["../primary"]
+            }),
+            "/secondary/b.ts": moduleImporting("../primary/a"),
+        }),
+        commandLineArgs: ["--p", "/primary/tsconfig.json"]
+    });
+});
+
+/**
+ * Validate that we enforce the basic settings constraints for referenced projects
+ */
+describe("unittests:: config:: project-references constraint checking for settings", () => {
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "errors when declaration = false",
+        fs: () => loadProjectFromFiles({
+            "/primary/tsconfig.json": getConfig({
+                options: {
+                    declaration: false
+                }
+            }),
+            "/primary/a.ts": emptyModule(),
+        }),
+        commandLineArgs: ["--p", "/primary/tsconfig.json"]
+    });
+
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "errors when the referenced project doesnt have composite",
+        fs: () => loadProjectFromFiles({
+            "/primary/tsconfig.json": getConfig({
+                options: {
+                    composite: false
+                }
+            }),
+            "/primary/a.ts": emptyModule(),
+            "/reference/tsconfig.json": getConfig({
+                references: ["../primary"],
+                config: {
+                    files: ["b.ts"]
+                }
+            }),
+            "/reference/b.ts": moduleImporting("../primary/a"),
+        }),
+        commandLineArgs: ["--p", "/reference/tsconfig.json"]
+    });
+
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "does not error when the referenced project doesnt have composite if its a container project",
+        fs: () => loadProjectFromFiles({
+            "/primary/tsconfig.json": getConfig({
+                options: {
+                    composite: false
+                }
+            }),
+            "/primary/a.ts": emptyModule(),
+            "/reference/tsconfig.json": getConfig({
+                references: ["../primary"],
+                config: {
+                    files: []
+                }
+            }),
+            "/reference/b.ts": moduleImporting("../primary/a"),
+        }),
+        commandLineArgs: ["--p", "/reference/tsconfig.json"]
+    });
+
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "errors when the file list is not exhaustive",
+        fs: () => loadProjectFromFiles({
+            "/primary/tsconfig.json": getConfig({
+                config: {
+                    files: ["a.ts"]
+                }
+            }),
+            "/primary/a.ts": "import * as b from './b'",
+            "/primary/b.ts": "export {}",
+        }),
+        commandLineArgs: ["--p", "/primary/tsconfig.json"]
+    });
+
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "errors when the referenced project doesnt exist",
+        fs: () => loadProjectFromFiles({
+            "/primary/tsconfig.json": getConfig({
+                references: ["../foo"]
+            }),
+            "/primary/a.ts": emptyModule(),
+        }),
+        commandLineArgs: ["--p", "/primary/tsconfig.json"]
+    });
+
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "errors when a prepended project reference doesnt set outFile",
+        fs: () => loadProjectFromFiles({
+            "/primary/tsconfig.json": getConfig({
+                references: [{ path: "../someProj", prepend: true }],
+            }),
+            "/primary/a.ts": emptyModule(),
+            "/someProj/tsconfig.json": getConfig(),
+            "/someProj/b.ts": "const x = 100;",
+        }),
+        commandLineArgs: ["--p", "/primary/tsconfig.json", "--ignoreDeprecations", "5.0"]
+    });
+
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "errors when a prepended project reference output doesnt exist",
+        fs: () => loadProjectFromFiles({
+            "/primary/tsconfig.json": getConfig({
+                references: [{ path: "../someProj", prepend: true }],
+            }),
+            "/primary/a.ts": "const y = x;",
+            "/someProj/tsconfig.json": getConfig({
+                options: { outFile: "foo.js" }
+            }),
+            "/someProj/b.ts": "const x = 100;",
+        }),
+        commandLineArgs: ["--p", "/primary/tsconfig.json", "--ignoreDeprecations", "5.0"]
+    });
+});
+
+/**
+ * Path mapping behavior
+ */
+describe("unittests:: config:: project-references path mapping", () => {
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "redirects to the output dts file",
+        fs: () => loadProjectFromFiles({
+            "/alpha/tsconfig.json": getConfig(),
+            "/alpha/a.ts": "export const m: number = 3;",
+            "/alpha/bin/a.d.ts": emptyModule(),
+            "/beta/tsconfig.json": getConfig({
+                references: ["../alpha"]
+            }),
+            "/beta/b.ts": "import { m } from '../alpha/a'",
+        }),
+        commandLineArgs: ["--p", "/beta/tsconfig.json", "--explainFiles"]
+    });
+});
+
+describe("unittests:: config:: project-references nice-behavior", () => {
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "issues a nice error when the input file is missing",
+        fs: () => loadProjectFromFiles({
+            "/alpha/tsconfig.json": getConfig(),
+            "/alpha/a.ts": "export const m: number = 3;",
+            "/beta/tsconfig.json": getConfig({
+                references: ["../alpha"]
+            }),
+            "/beta/b.ts": "import { m } from '../alpha/a'",
+        }),
+        commandLineArgs: ["--p", "/beta/tsconfig.json"]
+    });
+
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "issues a nice error when the input file is missing when module reference is not relative",
+        fs: () => loadProjectFromFiles({
+            "/alpha/tsconfig.json": getConfig(),
+            "/alpha/a.ts": "export const m: number = 3;",
+            "/beta/tsconfig.json": getConfig({
+                references: ["../alpha"],
+                options: {
+                    baseUrl: "./",
+                    paths: {
+                        "@alpha/*": ["/alpha/*"]
+                    }
+                }
+            }),
+            "/beta/b.ts": "import { m } from '@alpha/a'",
+        }),
+        commandLineArgs: ["--p", "/beta/tsconfig.json"]
+    });
+});
+
+/**
+ * 'composite' behavior
+ */
+describe("unittests:: config:: project-references behavior changes under composite: true", () => {
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "doesnt infer the rootDir from source paths",
+        fs: () => loadProjectFromFiles({
+            "/alpha/tsconfig.json": getConfig(),
+            "/alpha/src/a.ts": "export const m: number = 3;",
+        }),
+        commandLineArgs: ["--p", "/alpha/tsconfig.json"]
+    });
+});
+
+describe("unittests:: config:: project-references errors when a file in a composite project occurs outside the root", () => {
+    verifyTsc({
+        scenario: "projectReferencesConfig",
+        subScenario: "errors when a file is outside the rootdir",
+        fs: () => loadProjectFromFiles({
+            "/alpha/tsconfig.json": getConfig(),
+            "/alpha/src/a.ts": "import * as b from '../../beta/b'",
+            "/beta/b.ts": "export { }",
+        }),
+        commandLineArgs: ["--p", "/alpha/tsconfig.json"]
+    });
+});
diff --git a/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles from an array only once under a case insensitive host.js b/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles from an array only once under a case insensitive host.js
new file mode 100644
index 0000000000000..25df25570d0df
--- /dev/null
+++ b/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles from an array only once under a case insensitive host.js	
@@ -0,0 +1,157 @@
+Fs::
+//// [c:/dev/circular.json]
+{"extends":"./circular2","compilerOptions":{"module":"amd"}}
+
+//// [c:/dev/circular2.json]
+{"extends":"./circular","compilerOptions":{"module":"commonjs"}}
+
+//// [c:/dev/configs/base.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [c:/dev/configs/extendsArrayFifth.json]
+{"extends":["./extendsArrayFirst","./extendsArraySecond","./extendsArrayThird","./extendsArrayFourth"],"files":[]}
+
+//// [c:/dev/configs/extendsArrayFirst.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [c:/dev/configs/extendsArrayFourth.json]
+{"compilerOptions":{"module":"system","strictNullChecks":false},"include":null,"files":["../main.ts"]}
+
+//// [c:/dev/configs/extendsArraySecond.json]
+{"compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [c:/dev/configs/extendsArrayThird.json]
+{"compilerOptions":{"module":null,"noImplicitAny":false},"extends":"./extendsArrayFirst","include":["../supplemental.*"]}
+
+//// [c:/dev/configs/fifth.json]
+{"extends":"./fourth","include":["../tests/utils.ts"],"files":[]}
+
+//// [c:/dev/configs/first.json]
+{"extends":"./base","compilerOptions":{"module":"commonjs"},"files":["../main.ts"]}
+
+//// [c:/dev/configs/fourth.json]
+{"extends":"./third","compilerOptions":{"module":"system"},"include":null,"files":["../main.ts"]}
+
+//// [c:/dev/configs/second.json]
+{"extends":"./base","compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [c:/dev/configs/tests.json]
+{"compilerOptions":{"preserveConstEnums":true,"removeComments":false,"sourceMap":true},"exclude":["../tests/baselines","../tests/scenarios"],"include":["../tests/**/*.ts"]}
+
+//// [c:/dev/configs/third.json]
+{"extends":"./second","compilerOptions":{"module":null},"include":["../supplemental.*"]}
+
+//// [c:/dev/extends.json]
+{"extends":42}
+
+//// [c:/dev/extends2.json]
+{"extends":"configs/base"}
+
+//// [c:/dev/extends3.json]
+{"extends":""}
+
+//// [c:/dev/extends4.json]
+{"extends":[""]}
+
+//// [c:/dev/extendsArrayFails.json]
+{"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+
+//// [c:/dev/extendsArrayFails2.json]
+{"extends":[42]}
+
+//// [c:/dev/failure.json]
+{"extends":"./failure2.json","compilerOptions":{"typeRoots":[]}}
+
+//// [c:/dev/failure2.json]
+{"excludes":["*.js"]}
+
+//// [c:/dev/main.ts]
+
+
+//// [c:/dev/missing.json]
+{"extends":"./missing2","compilerOptions":{"types":[]}}
+
+//// [c:/dev/node_modules/@foo/tsconfig/package.json]
+{"name":"@foo/tsconfig","version":"1.0.0","exports":{".":"./src/tsconfig.json"}}
+
+//// [c:/dev/node_modules/@foo/tsconfig/src/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box/package.json]
+{"name":"config-box","version":"1.0.0","tsconfig":"./strict.json"}
+
+//// [c:/dev/node_modules/config-box/strict.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box/unstrict.json]
+{"compilerOptions":{"strict":false}}
+
+//// [c:/dev/node_modules/config-box-implied/package.json]
+{"name":"config-box-implied","version":"1.0.0"}
+
+//// [c:/dev/node_modules/config-box-implied/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box-implied/unstrict/tsconfig.json]
+{"compilerOptions":{"strict":false}}
+
+//// [c:/dev/supplemental.ts]
+
+
+//// [c:/dev/tests/baselines/first/output.ts]
+
+
+//// [c:/dev/tests/scenarios/first.json]
+
+
+//// [c:/dev/tests/unit/spec.ts]
+
+
+//// [c:/dev/tests/utils.ts]
+
+
+//// [c:/dev/tsconfig.extendsBox.json]
+{"extends":"config-box","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImplied.json]
+{"extends":"config-box-implied","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedPath.json]
+{"extends":"config-box-implied/tsconfig.json","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedUnstrict.json]
+{"extends":"config-box-implied/unstrict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedUnstrictExtension.json]
+{"extends":"config-box-implied/unstrict/tsconfig","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsFoo.json]
+{"extends":"@foo/tsconfig","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsStrict.json]
+{"extends":"config-box/strict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsStrictExtension.json]
+{"extends":"config-box/strict.json","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsUnStrict.json]
+{"extends":"config-box/unstrict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.json]
+{"extends":"./configs/base","files":["main.ts","supplemental.ts"]}
+
+//// [c:/dev/tsconfig.nostrictnull.json]
+{"extends":"./tsconfig","compilerOptions":{"strictNullChecks":false}}
+
+
+configFileName:: adds extendedSourceFiles from an array only once
+ExtendedSourceFiles::
+c:/dev/configs/extendsArrayFirst.json
+c:/dev/configs/extendsArraySecond.json
+c:/dev/configs/extendsArrayThird.json
+c:/dev/configs/extendsArrayFourth.json
+After reusing sourceFile ExtendedSourceFiles::
+c:/dev/configs/extendsArrayFirst.json
+c:/dev/configs/extendsArraySecond.json
+c:/dev/configs/extendsArrayThird.json
+c:/dev/configs/extendsArrayFourth.json
\ No newline at end of file
diff --git a/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles from an array only once under a case sensitive host.js b/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles from an array only once under a case sensitive host.js
new file mode 100644
index 0000000000000..8abed829c1535
--- /dev/null
+++ b/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles from an array only once under a case sensitive host.js	
@@ -0,0 +1,157 @@
+Fs::
+//// [/dev/circular.json]
+{"extends":"./circular2","compilerOptions":{"module":"amd"}}
+
+//// [/dev/circular2.json]
+{"extends":"./circular","compilerOptions":{"module":"commonjs"}}
+
+//// [/dev/configs/base.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [/dev/configs/extendsArrayFifth.json]
+{"extends":["./extendsArrayFirst","./extendsArraySecond","./extendsArrayThird","./extendsArrayFourth"],"files":[]}
+
+//// [/dev/configs/extendsArrayFirst.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [/dev/configs/extendsArrayFourth.json]
+{"compilerOptions":{"module":"system","strictNullChecks":false},"include":null,"files":["../main.ts"]}
+
+//// [/dev/configs/extendsArraySecond.json]
+{"compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [/dev/configs/extendsArrayThird.json]
+{"compilerOptions":{"module":null,"noImplicitAny":false},"extends":"./extendsArrayFirst","include":["../supplemental.*"]}
+
+//// [/dev/configs/fifth.json]
+{"extends":"./fourth","include":["../tests/utils.ts"],"files":[]}
+
+//// [/dev/configs/first.json]
+{"extends":"./base","compilerOptions":{"module":"commonjs"},"files":["../main.ts"]}
+
+//// [/dev/configs/fourth.json]
+{"extends":"./third","compilerOptions":{"module":"system"},"include":null,"files":["../main.ts"]}
+
+//// [/dev/configs/second.json]
+{"extends":"./base","compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [/dev/configs/tests.json]
+{"compilerOptions":{"preserveConstEnums":true,"removeComments":false,"sourceMap":true},"exclude":["../tests/baselines","../tests/scenarios"],"include":["../tests/**/*.ts"]}
+
+//// [/dev/configs/third.json]
+{"extends":"./second","compilerOptions":{"module":null},"include":["../supplemental.*"]}
+
+//// [/dev/extends.json]
+{"extends":42}
+
+//// [/dev/extends2.json]
+{"extends":"configs/base"}
+
+//// [/dev/extends3.json]
+{"extends":""}
+
+//// [/dev/extends4.json]
+{"extends":[""]}
+
+//// [/dev/extendsArrayFails.json]
+{"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+
+//// [/dev/extendsArrayFails2.json]
+{"extends":[42]}
+
+//// [/dev/failure.json]
+{"extends":"./failure2.json","compilerOptions":{"typeRoots":[]}}
+
+//// [/dev/failure2.json]
+{"excludes":["*.js"]}
+
+//// [/dev/main.ts]
+
+
+//// [/dev/missing.json]
+{"extends":"./missing2","compilerOptions":{"types":[]}}
+
+//// [/dev/node_modules/@foo/tsconfig/package.json]
+{"name":"@foo/tsconfig","version":"1.0.0","exports":{".":"./src/tsconfig.json"}}
+
+//// [/dev/node_modules/@foo/tsconfig/src/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box/package.json]
+{"name":"config-box","version":"1.0.0","tsconfig":"./strict.json"}
+
+//// [/dev/node_modules/config-box/strict.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box/unstrict.json]
+{"compilerOptions":{"strict":false}}
+
+//// [/dev/node_modules/config-box-implied/package.json]
+{"name":"config-box-implied","version":"1.0.0"}
+
+//// [/dev/node_modules/config-box-implied/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box-implied/unstrict/tsconfig.json]
+{"compilerOptions":{"strict":false}}
+
+//// [/dev/supplemental.ts]
+
+
+//// [/dev/tests/baselines/first/output.ts]
+
+
+//// [/dev/tests/scenarios/first.json]
+
+
+//// [/dev/tests/unit/spec.ts]
+
+
+//// [/dev/tests/utils.ts]
+
+
+//// [/dev/tsconfig.extendsBox.json]
+{"extends":"config-box","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImplied.json]
+{"extends":"config-box-implied","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedPath.json]
+{"extends":"config-box-implied/tsconfig.json","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedUnstrict.json]
+{"extends":"config-box-implied/unstrict","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedUnstrictExtension.json]
+{"extends":"config-box-implied/unstrict/tsconfig","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsFoo.json]
+{"extends":"@foo/tsconfig","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsStrict.json]
+{"extends":"config-box/strict","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsStrictExtension.json]
+{"extends":"config-box/strict.json","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsUnStrict.json]
+{"extends":"config-box/unstrict","files":["main.ts"]}
+
+//// [/dev/tsconfig.json]
+{"extends":"./configs/base","files":["main.ts","supplemental.ts"]}
+
+//// [/dev/tsconfig.nostrictnull.json]
+{"extends":"./tsconfig","compilerOptions":{"strictNullChecks":false}}
+
+
+configFileName:: adds extendedSourceFiles from an array only once
+ExtendedSourceFiles::
+/dev/configs/extendsArrayFirst.json
+/dev/configs/extendsArraySecond.json
+/dev/configs/extendsArrayThird.json
+/dev/configs/extendsArrayFourth.json
+After reusing sourceFile ExtendedSourceFiles::
+/dev/configs/extendsArrayFirst.json
+/dev/configs/extendsArraySecond.json
+/dev/configs/extendsArrayThird.json
+/dev/configs/extendsArrayFourth.json
\ No newline at end of file
diff --git a/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles only once under a case insensitive host.js b/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles only once under a case insensitive host.js
new file mode 100644
index 0000000000000..d65f68384f02e
--- /dev/null
+++ b/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles only once under a case insensitive host.js	
@@ -0,0 +1,155 @@
+Fs::
+//// [c:/dev/circular.json]
+{"extends":"./circular2","compilerOptions":{"module":"amd"}}
+
+//// [c:/dev/circular2.json]
+{"extends":"./circular","compilerOptions":{"module":"commonjs"}}
+
+//// [c:/dev/configs/base.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [c:/dev/configs/extendsArrayFifth.json]
+{"extends":["./extendsArrayFirst","./extendsArraySecond","./extendsArrayThird","./extendsArrayFourth"],"files":[]}
+
+//// [c:/dev/configs/extendsArrayFirst.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [c:/dev/configs/extendsArrayFourth.json]
+{"compilerOptions":{"module":"system","strictNullChecks":false},"include":null,"files":["../main.ts"]}
+
+//// [c:/dev/configs/extendsArraySecond.json]
+{"compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [c:/dev/configs/extendsArrayThird.json]
+{"compilerOptions":{"module":null,"noImplicitAny":false},"extends":"./extendsArrayFirst","include":["../supplemental.*"]}
+
+//// [c:/dev/configs/fifth.json]
+{"extends":"./fourth","include":["../tests/utils.ts"],"files":[]}
+
+//// [c:/dev/configs/first.json]
+{"extends":"./base","compilerOptions":{"module":"commonjs"},"files":["../main.ts"]}
+
+//// [c:/dev/configs/fourth.json]
+{"extends":"./third","compilerOptions":{"module":"system"},"include":null,"files":["../main.ts"]}
+
+//// [c:/dev/configs/second.json]
+{"extends":"./base","compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [c:/dev/configs/tests.json]
+{"compilerOptions":{"preserveConstEnums":true,"removeComments":false,"sourceMap":true},"exclude":["../tests/baselines","../tests/scenarios"],"include":["../tests/**/*.ts"]}
+
+//// [c:/dev/configs/third.json]
+{"extends":"./second","compilerOptions":{"module":null},"include":["../supplemental.*"]}
+
+//// [c:/dev/extends.json]
+{"extends":42}
+
+//// [c:/dev/extends2.json]
+{"extends":"configs/base"}
+
+//// [c:/dev/extends3.json]
+{"extends":""}
+
+//// [c:/dev/extends4.json]
+{"extends":[""]}
+
+//// [c:/dev/extendsArrayFails.json]
+{"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+
+//// [c:/dev/extendsArrayFails2.json]
+{"extends":[42]}
+
+//// [c:/dev/failure.json]
+{"extends":"./failure2.json","compilerOptions":{"typeRoots":[]}}
+
+//// [c:/dev/failure2.json]
+{"excludes":["*.js"]}
+
+//// [c:/dev/main.ts]
+
+
+//// [c:/dev/missing.json]
+{"extends":"./missing2","compilerOptions":{"types":[]}}
+
+//// [c:/dev/node_modules/@foo/tsconfig/package.json]
+{"name":"@foo/tsconfig","version":"1.0.0","exports":{".":"./src/tsconfig.json"}}
+
+//// [c:/dev/node_modules/@foo/tsconfig/src/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box/package.json]
+{"name":"config-box","version":"1.0.0","tsconfig":"./strict.json"}
+
+//// [c:/dev/node_modules/config-box/strict.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box/unstrict.json]
+{"compilerOptions":{"strict":false}}
+
+//// [c:/dev/node_modules/config-box-implied/package.json]
+{"name":"config-box-implied","version":"1.0.0"}
+
+//// [c:/dev/node_modules/config-box-implied/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box-implied/unstrict/tsconfig.json]
+{"compilerOptions":{"strict":false}}
+
+//// [c:/dev/supplemental.ts]
+
+
+//// [c:/dev/tests/baselines/first/output.ts]
+
+
+//// [c:/dev/tests/scenarios/first.json]
+
+
+//// [c:/dev/tests/unit/spec.ts]
+
+
+//// [c:/dev/tests/utils.ts]
+
+
+//// [c:/dev/tsconfig.extendsBox.json]
+{"extends":"config-box","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImplied.json]
+{"extends":"config-box-implied","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedPath.json]
+{"extends":"config-box-implied/tsconfig.json","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedUnstrict.json]
+{"extends":"config-box-implied/unstrict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedUnstrictExtension.json]
+{"extends":"config-box-implied/unstrict/tsconfig","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsFoo.json]
+{"extends":"@foo/tsconfig","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsStrict.json]
+{"extends":"config-box/strict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsStrictExtension.json]
+{"extends":"config-box/strict.json","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsUnStrict.json]
+{"extends":"config-box/unstrict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.json]
+{"extends":"./configs/base","files":["main.ts","supplemental.ts"]}
+
+//// [c:/dev/tsconfig.nostrictnull.json]
+{"extends":"./tsconfig","compilerOptions":{"strictNullChecks":false}}
+
+
+configFileName:: adds extendedSourceFiles only once
+ExtendedSourceFiles::
+c:/dev/configs/third.json
+c:/dev/configs/second.json
+c:/dev/configs/base.json
+After reusing sourceFile ExtendedSourceFiles::
+c:/dev/configs/third.json
+c:/dev/configs/second.json
+c:/dev/configs/base.json
\ No newline at end of file
diff --git a/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles only once under a case sensitive host.js b/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles only once under a case sensitive host.js
new file mode 100644
index 0000000000000..06001b27e981c
--- /dev/null
+++ b/tests/baselines/reference/config/configurationExtension/adds extendedSourceFiles only once under a case sensitive host.js	
@@ -0,0 +1,155 @@
+Fs::
+//// [/dev/circular.json]
+{"extends":"./circular2","compilerOptions":{"module":"amd"}}
+
+//// [/dev/circular2.json]
+{"extends":"./circular","compilerOptions":{"module":"commonjs"}}
+
+//// [/dev/configs/base.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [/dev/configs/extendsArrayFifth.json]
+{"extends":["./extendsArrayFirst","./extendsArraySecond","./extendsArrayThird","./extendsArrayFourth"],"files":[]}
+
+//// [/dev/configs/extendsArrayFirst.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [/dev/configs/extendsArrayFourth.json]
+{"compilerOptions":{"module":"system","strictNullChecks":false},"include":null,"files":["../main.ts"]}
+
+//// [/dev/configs/extendsArraySecond.json]
+{"compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [/dev/configs/extendsArrayThird.json]
+{"compilerOptions":{"module":null,"noImplicitAny":false},"extends":"./extendsArrayFirst","include":["../supplemental.*"]}
+
+//// [/dev/configs/fifth.json]
+{"extends":"./fourth","include":["../tests/utils.ts"],"files":[]}
+
+//// [/dev/configs/first.json]
+{"extends":"./base","compilerOptions":{"module":"commonjs"},"files":["../main.ts"]}
+
+//// [/dev/configs/fourth.json]
+{"extends":"./third","compilerOptions":{"module":"system"},"include":null,"files":["../main.ts"]}
+
+//// [/dev/configs/second.json]
+{"extends":"./base","compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [/dev/configs/tests.json]
+{"compilerOptions":{"preserveConstEnums":true,"removeComments":false,"sourceMap":true},"exclude":["../tests/baselines","../tests/scenarios"],"include":["../tests/**/*.ts"]}
+
+//// [/dev/configs/third.json]
+{"extends":"./second","compilerOptions":{"module":null},"include":["../supplemental.*"]}
+
+//// [/dev/extends.json]
+{"extends":42}
+
+//// [/dev/extends2.json]
+{"extends":"configs/base"}
+
+//// [/dev/extends3.json]
+{"extends":""}
+
+//// [/dev/extends4.json]
+{"extends":[""]}
+
+//// [/dev/extendsArrayFails.json]
+{"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+
+//// [/dev/extendsArrayFails2.json]
+{"extends":[42]}
+
+//// [/dev/failure.json]
+{"extends":"./failure2.json","compilerOptions":{"typeRoots":[]}}
+
+//// [/dev/failure2.json]
+{"excludes":["*.js"]}
+
+//// [/dev/main.ts]
+
+
+//// [/dev/missing.json]
+{"extends":"./missing2","compilerOptions":{"types":[]}}
+
+//// [/dev/node_modules/@foo/tsconfig/package.json]
+{"name":"@foo/tsconfig","version":"1.0.0","exports":{".":"./src/tsconfig.json"}}
+
+//// [/dev/node_modules/@foo/tsconfig/src/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box/package.json]
+{"name":"config-box","version":"1.0.0","tsconfig":"./strict.json"}
+
+//// [/dev/node_modules/config-box/strict.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box/unstrict.json]
+{"compilerOptions":{"strict":false}}
+
+//// [/dev/node_modules/config-box-implied/package.json]
+{"name":"config-box-implied","version":"1.0.0"}
+
+//// [/dev/node_modules/config-box-implied/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box-implied/unstrict/tsconfig.json]
+{"compilerOptions":{"strict":false}}
+
+//// [/dev/supplemental.ts]
+
+
+//// [/dev/tests/baselines/first/output.ts]
+
+
+//// [/dev/tests/scenarios/first.json]
+
+
+//// [/dev/tests/unit/spec.ts]
+
+
+//// [/dev/tests/utils.ts]
+
+
+//// [/dev/tsconfig.extendsBox.json]
+{"extends":"config-box","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImplied.json]
+{"extends":"config-box-implied","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedPath.json]
+{"extends":"config-box-implied/tsconfig.json","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedUnstrict.json]
+{"extends":"config-box-implied/unstrict","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedUnstrictExtension.json]
+{"extends":"config-box-implied/unstrict/tsconfig","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsFoo.json]
+{"extends":"@foo/tsconfig","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsStrict.json]
+{"extends":"config-box/strict","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsStrictExtension.json]
+{"extends":"config-box/strict.json","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsUnStrict.json]
+{"extends":"config-box/unstrict","files":["main.ts"]}
+
+//// [/dev/tsconfig.json]
+{"extends":"./configs/base","files":["main.ts","supplemental.ts"]}
+
+//// [/dev/tsconfig.nostrictnull.json]
+{"extends":"./tsconfig","compilerOptions":{"strictNullChecks":false}}
+
+
+configFileName:: adds extendedSourceFiles only once
+ExtendedSourceFiles::
+/dev/configs/third.json
+/dev/configs/second.json
+/dev/configs/base.json
+After reusing sourceFile ExtendedSourceFiles::
+/dev/configs/third.json
+/dev/configs/second.json
+/dev/configs/base.json
\ No newline at end of file
diff --git a/tests/baselines/reference/config/configurationExtension/under a case insensitive host with json api.js b/tests/baselines/reference/config/configurationExtension/under a case insensitive host with json api.js
new file mode 100644
index 0000000000000..50a875b2cd864
--- /dev/null
+++ b/tests/baselines/reference/config/configurationExtension/under a case insensitive host with json api.js	
@@ -0,0 +1,443 @@
+Fs::
+//// [c:/dev/circular.json]
+{"extends":"./circular2","compilerOptions":{"module":"amd"}}
+
+//// [c:/dev/circular2.json]
+{"extends":"./circular","compilerOptions":{"module":"commonjs"}}
+
+//// [c:/dev/configs/base.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [c:/dev/configs/extendsArrayFifth.json]
+{"extends":["./extendsArrayFirst","./extendsArraySecond","./extendsArrayThird","./extendsArrayFourth"],"files":[]}
+
+//// [c:/dev/configs/extendsArrayFirst.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [c:/dev/configs/extendsArrayFourth.json]
+{"compilerOptions":{"module":"system","strictNullChecks":false},"include":null,"files":["../main.ts"]}
+
+//// [c:/dev/configs/extendsArraySecond.json]
+{"compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [c:/dev/configs/extendsArrayThird.json]
+{"compilerOptions":{"module":null,"noImplicitAny":false},"extends":"./extendsArrayFirst","include":["../supplemental.*"]}
+
+//// [c:/dev/configs/fifth.json]
+{"extends":"./fourth","include":["../tests/utils.ts"],"files":[]}
+
+//// [c:/dev/configs/first.json]
+{"extends":"./base","compilerOptions":{"module":"commonjs"},"files":["../main.ts"]}
+
+//// [c:/dev/configs/fourth.json]
+{"extends":"./third","compilerOptions":{"module":"system"},"include":null,"files":["../main.ts"]}
+
+//// [c:/dev/configs/second.json]
+{"extends":"./base","compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [c:/dev/configs/tests.json]
+{"compilerOptions":{"preserveConstEnums":true,"removeComments":false,"sourceMap":true},"exclude":["../tests/baselines","../tests/scenarios"],"include":["../tests/**/*.ts"]}
+
+//// [c:/dev/configs/third.json]
+{"extends":"./second","compilerOptions":{"module":null},"include":["../supplemental.*"]}
+
+//// [c:/dev/extends.json]
+{"extends":42}
+
+//// [c:/dev/extends2.json]
+{"extends":"configs/base"}
+
+//// [c:/dev/extends3.json]
+{"extends":""}
+
+//// [c:/dev/extends4.json]
+{"extends":[""]}
+
+//// [c:/dev/extendsArrayFails.json]
+{"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+
+//// [c:/dev/extendsArrayFails2.json]
+{"extends":[42]}
+
+//// [c:/dev/failure.json]
+{"extends":"./failure2.json","compilerOptions":{"typeRoots":[]}}
+
+//// [c:/dev/failure2.json]
+{"excludes":["*.js"]}
+
+//// [c:/dev/main.ts]
+
+
+//// [c:/dev/missing.json]
+{"extends":"./missing2","compilerOptions":{"types":[]}}
+
+//// [c:/dev/node_modules/@foo/tsconfig/package.json]
+{"name":"@foo/tsconfig","version":"1.0.0","exports":{".":"./src/tsconfig.json"}}
+
+//// [c:/dev/node_modules/@foo/tsconfig/src/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box/package.json]
+{"name":"config-box","version":"1.0.0","tsconfig":"./strict.json"}
+
+//// [c:/dev/node_modules/config-box/strict.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box/unstrict.json]
+{"compilerOptions":{"strict":false}}
+
+//// [c:/dev/node_modules/config-box-implied/package.json]
+{"name":"config-box-implied","version":"1.0.0"}
+
+//// [c:/dev/node_modules/config-box-implied/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box-implied/unstrict/tsconfig.json]
+{"compilerOptions":{"strict":false}}
+
+//// [c:/dev/supplemental.ts]
+
+
+//// [c:/dev/tests/baselines/first/output.ts]
+
+
+//// [c:/dev/tests/scenarios/first.json]
+
+
+//// [c:/dev/tests/unit/spec.ts]
+
+
+//// [c:/dev/tests/utils.ts]
+
+
+//// [c:/dev/tsconfig.extendsBox.json]
+{"extends":"config-box","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImplied.json]
+{"extends":"config-box-implied","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedPath.json]
+{"extends":"config-box-implied/tsconfig.json","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedUnstrict.json]
+{"extends":"config-box-implied/unstrict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedUnstrictExtension.json]
+{"extends":"config-box-implied/unstrict/tsconfig","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsFoo.json]
+{"extends":"@foo/tsconfig","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsStrict.json]
+{"extends":"config-box/strict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsStrictExtension.json]
+{"extends":"config-box/strict.json","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsUnStrict.json]
+{"extends":"config-box/unstrict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.json]
+{"extends":"./configs/base","files":["main.ts","supplemental.ts"]}
+
+//// [c:/dev/tsconfig.nostrictnull.json]
+{"extends":"./tsconfig","compilerOptions":{"strictNullChecks":false}}
+
+
+can resolve an extension with a base extension
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "configFilePath": "tsconfig.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts
+Errors::
+
+
+can resolve an extension with a base extension that overrides options
+configFileName:: tsconfig.nostrictnull.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": false,
+ "configFilePath": "tsconfig.nostrictnull.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts
+Errors::
+
+
+can report errors on circular imports
+configFileName:: circular.json
+CompilerOptions::
+{
+ "module": 2,
+ "configFilePath": "circular.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+error TS18000: Circularity detected while resolving configuration: c:/dev/circular.json -> c:/dev/circular2.json -> c:/dev/circular.json
+
+
+can report missing configurations
+configFileName:: missing.json
+CompilerOptions::
+{
+ "types": [],
+ "configFilePath": "missing.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+error TS6053: File './missing2' not found.
+
+
+can report errors in extended configs
+configFileName:: failure.json
+CompilerOptions::
+{
+ "typeRoots": [],
+ "configFilePath": "failure.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+failure2.json:1:2 - error TS6114: Unknown option 'excludes'. Did you mean 'exclude'?
+
+1 {"excludes":["*.js"]}
+   ~~~~~~~~~~
+
+
+can error when 'extends' is not a string or Array
+configFileName:: extends.json
+CompilerOptions::
+{
+ "configFilePath": "extends.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+error TS5024: Compiler option 'extends' requires a value of type string or Array.
+
+
+can error when 'extends' is given an empty string
+configFileName:: extends3.json
+CompilerOptions::
+{
+ "configFilePath": "extends3.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+error TS18051: Compiler option 'extends' cannot be given an empty string.
+
+
+can error when 'extends' is given an empty string in an array
+configFileName:: extends4.json
+CompilerOptions::
+{
+ "configFilePath": "extends4.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+error TS18051: Compiler option 'extends' cannot be given an empty string.
+
+
+can overwrite compiler options using extended 'null'
+configFileName:: configs/third.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "configFilePath": "configs/third.json"
+}
+FileNames::
+c:/dev/supplemental.ts
+Errors::
+
+
+can overwrite top-level options using extended 'null'
+configFileName:: configs/fourth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "module": 4,
+ "configFilePath": "configs/fourth.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can overwrite top-level files using extended []
+configFileName:: configs/fifth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "module": 4,
+ "configFilePath": "configs/fifth.json"
+}
+FileNames::
+c:/dev/tests/utils.ts
+Errors::
+
+
+can lookup via tsconfig field
+configFileName:: tsconfig.extendsBox.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBox.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via package-relative path
+configFileName:: tsconfig.extendsStrict.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsStrict.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via non-redirected-to package-relative path
+configFileName:: tsconfig.extendsUnStrict.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsUnStrict.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via package-relative path with extension
+configFileName:: tsconfig.extendsStrictExtension.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsStrictExtension.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig
+configFileName:: tsconfig.extendsBoxImplied.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBoxImplied.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory
+configFileName:: tsconfig.extendsBoxImpliedUnstrict.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsBoxImpliedUnstrict.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory with name
+configFileName:: tsconfig.extendsBoxImpliedUnstrictExtension.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsBoxImpliedUnstrictExtension.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory with extension
+configFileName:: tsconfig.extendsBoxImpliedPath.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBoxImpliedPath.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an package.json exports
+configFileName:: tsconfig.extendsFoo.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsFoo.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can overwrite top-level compilerOptions
+configFileName:: configs/extendsArrayFifth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": false,
+ "strictNullChecks": false,
+ "module": 4,
+ "configFilePath": "configs/extendsArrayFifth.json"
+}
+FileNames::
+
+Errors::
+
+
+can report missing configurations
+configFileName:: extendsArrayFails.json
+CompilerOptions::
+{
+ "types": [],
+ "configFilePath": "extendsArrayFails.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+error TS6053: File './missingFile' not found.
+
+
+can error when 'extends' is not a string or Array2
+configFileName:: extendsArrayFails2.json
+CompilerOptions::
+{
+ "configFilePath": "extendsArrayFails2.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+error TS5024: Compiler option 'extends' requires a value of type string.
+
diff --git a/tests/baselines/reference/config/configurationExtension/under a case insensitive host with jsonSourceFile api.js b/tests/baselines/reference/config/configurationExtension/under a case insensitive host with jsonSourceFile api.js
new file mode 100644
index 0000000000000..9e7dad1da7c65
--- /dev/null
+++ b/tests/baselines/reference/config/configurationExtension/under a case insensitive host with jsonSourceFile api.js	
@@ -0,0 +1,461 @@
+Fs::
+//// [c:/dev/circular.json]
+{"extends":"./circular2","compilerOptions":{"module":"amd"}}
+
+//// [c:/dev/circular2.json]
+{"extends":"./circular","compilerOptions":{"module":"commonjs"}}
+
+//// [c:/dev/configs/base.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [c:/dev/configs/extendsArrayFifth.json]
+{"extends":["./extendsArrayFirst","./extendsArraySecond","./extendsArrayThird","./extendsArrayFourth"],"files":[]}
+
+//// [c:/dev/configs/extendsArrayFirst.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [c:/dev/configs/extendsArrayFourth.json]
+{"compilerOptions":{"module":"system","strictNullChecks":false},"include":null,"files":["../main.ts"]}
+
+//// [c:/dev/configs/extendsArraySecond.json]
+{"compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [c:/dev/configs/extendsArrayThird.json]
+{"compilerOptions":{"module":null,"noImplicitAny":false},"extends":"./extendsArrayFirst","include":["../supplemental.*"]}
+
+//// [c:/dev/configs/fifth.json]
+{"extends":"./fourth","include":["../tests/utils.ts"],"files":[]}
+
+//// [c:/dev/configs/first.json]
+{"extends":"./base","compilerOptions":{"module":"commonjs"},"files":["../main.ts"]}
+
+//// [c:/dev/configs/fourth.json]
+{"extends":"./third","compilerOptions":{"module":"system"},"include":null,"files":["../main.ts"]}
+
+//// [c:/dev/configs/second.json]
+{"extends":"./base","compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [c:/dev/configs/tests.json]
+{"compilerOptions":{"preserveConstEnums":true,"removeComments":false,"sourceMap":true},"exclude":["../tests/baselines","../tests/scenarios"],"include":["../tests/**/*.ts"]}
+
+//// [c:/dev/configs/third.json]
+{"extends":"./second","compilerOptions":{"module":null},"include":["../supplemental.*"]}
+
+//// [c:/dev/extends.json]
+{"extends":42}
+
+//// [c:/dev/extends2.json]
+{"extends":"configs/base"}
+
+//// [c:/dev/extends3.json]
+{"extends":""}
+
+//// [c:/dev/extends4.json]
+{"extends":[""]}
+
+//// [c:/dev/extendsArrayFails.json]
+{"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+
+//// [c:/dev/extendsArrayFails2.json]
+{"extends":[42]}
+
+//// [c:/dev/failure.json]
+{"extends":"./failure2.json","compilerOptions":{"typeRoots":[]}}
+
+//// [c:/dev/failure2.json]
+{"excludes":["*.js"]}
+
+//// [c:/dev/main.ts]
+
+
+//// [c:/dev/missing.json]
+{"extends":"./missing2","compilerOptions":{"types":[]}}
+
+//// [c:/dev/node_modules/@foo/tsconfig/package.json]
+{"name":"@foo/tsconfig","version":"1.0.0","exports":{".":"./src/tsconfig.json"}}
+
+//// [c:/dev/node_modules/@foo/tsconfig/src/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box/package.json]
+{"name":"config-box","version":"1.0.0","tsconfig":"./strict.json"}
+
+//// [c:/dev/node_modules/config-box/strict.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box/unstrict.json]
+{"compilerOptions":{"strict":false}}
+
+//// [c:/dev/node_modules/config-box-implied/package.json]
+{"name":"config-box-implied","version":"1.0.0"}
+
+//// [c:/dev/node_modules/config-box-implied/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [c:/dev/node_modules/config-box-implied/unstrict/tsconfig.json]
+{"compilerOptions":{"strict":false}}
+
+//// [c:/dev/supplemental.ts]
+
+
+//// [c:/dev/tests/baselines/first/output.ts]
+
+
+//// [c:/dev/tests/scenarios/first.json]
+
+
+//// [c:/dev/tests/unit/spec.ts]
+
+
+//// [c:/dev/tests/utils.ts]
+
+
+//// [c:/dev/tsconfig.extendsBox.json]
+{"extends":"config-box","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImplied.json]
+{"extends":"config-box-implied","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedPath.json]
+{"extends":"config-box-implied/tsconfig.json","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedUnstrict.json]
+{"extends":"config-box-implied/unstrict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsBoxImpliedUnstrictExtension.json]
+{"extends":"config-box-implied/unstrict/tsconfig","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsFoo.json]
+{"extends":"@foo/tsconfig","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsStrict.json]
+{"extends":"config-box/strict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsStrictExtension.json]
+{"extends":"config-box/strict.json","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.extendsUnStrict.json]
+{"extends":"config-box/unstrict","files":["main.ts"]}
+
+//// [c:/dev/tsconfig.json]
+{"extends":"./configs/base","files":["main.ts","supplemental.ts"]}
+
+//// [c:/dev/tsconfig.nostrictnull.json]
+{"extends":"./tsconfig","compilerOptions":{"strictNullChecks":false}}
+
+
+can resolve an extension with a base extension
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "configFilePath": "tsconfig.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts
+Errors::
+
+
+can resolve an extension with a base extension that overrides options
+configFileName:: tsconfig.nostrictnull.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": false,
+ "configFilePath": "tsconfig.nostrictnull.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts
+Errors::
+
+
+can report errors on circular imports
+configFileName:: circular.json
+CompilerOptions::
+{
+ "module": 2,
+ "configFilePath": "circular.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+error TS18000: Circularity detected while resolving configuration: c:/dev/circular.json -> c:/dev/circular2.json -> c:/dev/circular.json
+
+
+can report missing configurations
+configFileName:: missing.json
+CompilerOptions::
+{
+ "types": [],
+ "configFilePath": "missing.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+missing.json:1:12 - error TS6053: File './missing2' not found.
+
+1 {"extends":"./missing2","compilerOptions":{"types":[]}}
+             ~~~~~~~~~~~~
+
+
+can report errors in extended configs
+configFileName:: failure.json
+CompilerOptions::
+{
+ "typeRoots": [],
+ "configFilePath": "failure.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+failure2.json:1:2 - error TS6114: Unknown option 'excludes'. Did you mean 'exclude'?
+
+1 {"excludes":["*.js"]}
+   ~~~~~~~~~~
+
+
+can error when 'extends' is not a string or Array
+configFileName:: extends.json
+CompilerOptions::
+{
+ "configFilePath": "extends.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+extends.json:1:12 - error TS5024: Compiler option 'extends' requires a value of type string or Array.
+
+1 {"extends":42}
+             ~~
+
+
+can error when 'extends' is given an empty string
+configFileName:: extends3.json
+CompilerOptions::
+{
+ "configFilePath": "extends3.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+extends3.json:1:12 - error TS18051: Compiler option 'extends' cannot be given an empty string.
+
+1 {"extends":""}
+             ~~
+
+
+can error when 'extends' is given an empty string in an array
+configFileName:: extends4.json
+CompilerOptions::
+{
+ "configFilePath": "extends4.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+extends4.json:1:13 - error TS18051: Compiler option 'extends' cannot be given an empty string.
+
+1 {"extends":[""]}
+              ~~
+
+
+can overwrite compiler options using extended 'null'
+configFileName:: configs/third.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "configFilePath": "configs/third.json"
+}
+FileNames::
+c:/dev/supplemental.ts
+Errors::
+
+
+can overwrite top-level options using extended 'null'
+configFileName:: configs/fourth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "module": 4,
+ "configFilePath": "configs/fourth.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can overwrite top-level files using extended []
+configFileName:: configs/fifth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "module": 4,
+ "configFilePath": "configs/fifth.json"
+}
+FileNames::
+c:/dev/tests/utils.ts
+Errors::
+
+
+can lookup via tsconfig field
+configFileName:: tsconfig.extendsBox.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBox.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via package-relative path
+configFileName:: tsconfig.extendsStrict.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsStrict.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via non-redirected-to package-relative path
+configFileName:: tsconfig.extendsUnStrict.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsUnStrict.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via package-relative path with extension
+configFileName:: tsconfig.extendsStrictExtension.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsStrictExtension.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig
+configFileName:: tsconfig.extendsBoxImplied.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBoxImplied.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory
+configFileName:: tsconfig.extendsBoxImpliedUnstrict.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsBoxImpliedUnstrict.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory with name
+configFileName:: tsconfig.extendsBoxImpliedUnstrictExtension.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsBoxImpliedUnstrictExtension.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory with extension
+configFileName:: tsconfig.extendsBoxImpliedPath.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBoxImpliedPath.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can lookup via an package.json exports
+configFileName:: tsconfig.extendsFoo.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsFoo.json"
+}
+FileNames::
+c:/dev/main.ts
+Errors::
+
+
+can overwrite top-level compilerOptions
+configFileName:: configs/extendsArrayFifth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": false,
+ "strictNullChecks": false,
+ "module": 4,
+ "configFilePath": "configs/extendsArrayFifth.json"
+}
+FileNames::
+
+Errors::
+
+
+can report missing configurations
+configFileName:: extendsArrayFails.json
+CompilerOptions::
+{
+ "types": [],
+ "configFilePath": "extendsArrayFails.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+extendsArrayFails.json:1:13 - error TS6053: File './missingFile' not found.
+
+1 {"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+              ~~~~~~~~~~~~~~~
+
+
+can error when 'extends' is not a string or Array2
+configFileName:: extendsArrayFails2.json
+CompilerOptions::
+{
+ "configFilePath": "extendsArrayFails2.json"
+}
+FileNames::
+c:/dev/main.ts,c:/dev/supplemental.ts,c:/dev/tests/utils.ts,c:/dev/tests/baselines/first/output.ts,c:/dev/tests/unit/spec.ts
+Errors::
+extendsArrayFails2.json:1:13 - error TS5024: Compiler option 'extends' requires a value of type string.
+
+1 {"extends":[42]}
+              ~~
+
diff --git a/tests/baselines/reference/config/configurationExtension/under a case sensitive host with json api.js b/tests/baselines/reference/config/configurationExtension/under a case sensitive host with json api.js
new file mode 100644
index 0000000000000..4f0167c4cdad4
--- /dev/null
+++ b/tests/baselines/reference/config/configurationExtension/under a case sensitive host with json api.js	
@@ -0,0 +1,443 @@
+Fs::
+//// [/dev/circular.json]
+{"extends":"./circular2","compilerOptions":{"module":"amd"}}
+
+//// [/dev/circular2.json]
+{"extends":"./circular","compilerOptions":{"module":"commonjs"}}
+
+//// [/dev/configs/base.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [/dev/configs/extendsArrayFifth.json]
+{"extends":["./extendsArrayFirst","./extendsArraySecond","./extendsArrayThird","./extendsArrayFourth"],"files":[]}
+
+//// [/dev/configs/extendsArrayFirst.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [/dev/configs/extendsArrayFourth.json]
+{"compilerOptions":{"module":"system","strictNullChecks":false},"include":null,"files":["../main.ts"]}
+
+//// [/dev/configs/extendsArraySecond.json]
+{"compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [/dev/configs/extendsArrayThird.json]
+{"compilerOptions":{"module":null,"noImplicitAny":false},"extends":"./extendsArrayFirst","include":["../supplemental.*"]}
+
+//// [/dev/configs/fifth.json]
+{"extends":"./fourth","include":["../tests/utils.ts"],"files":[]}
+
+//// [/dev/configs/first.json]
+{"extends":"./base","compilerOptions":{"module":"commonjs"},"files":["../main.ts"]}
+
+//// [/dev/configs/fourth.json]
+{"extends":"./third","compilerOptions":{"module":"system"},"include":null,"files":["../main.ts"]}
+
+//// [/dev/configs/second.json]
+{"extends":"./base","compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [/dev/configs/tests.json]
+{"compilerOptions":{"preserveConstEnums":true,"removeComments":false,"sourceMap":true},"exclude":["../tests/baselines","../tests/scenarios"],"include":["../tests/**/*.ts"]}
+
+//// [/dev/configs/third.json]
+{"extends":"./second","compilerOptions":{"module":null},"include":["../supplemental.*"]}
+
+//// [/dev/extends.json]
+{"extends":42}
+
+//// [/dev/extends2.json]
+{"extends":"configs/base"}
+
+//// [/dev/extends3.json]
+{"extends":""}
+
+//// [/dev/extends4.json]
+{"extends":[""]}
+
+//// [/dev/extendsArrayFails.json]
+{"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+
+//// [/dev/extendsArrayFails2.json]
+{"extends":[42]}
+
+//// [/dev/failure.json]
+{"extends":"./failure2.json","compilerOptions":{"typeRoots":[]}}
+
+//// [/dev/failure2.json]
+{"excludes":["*.js"]}
+
+//// [/dev/main.ts]
+
+
+//// [/dev/missing.json]
+{"extends":"./missing2","compilerOptions":{"types":[]}}
+
+//// [/dev/node_modules/@foo/tsconfig/package.json]
+{"name":"@foo/tsconfig","version":"1.0.0","exports":{".":"./src/tsconfig.json"}}
+
+//// [/dev/node_modules/@foo/tsconfig/src/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box/package.json]
+{"name":"config-box","version":"1.0.0","tsconfig":"./strict.json"}
+
+//// [/dev/node_modules/config-box/strict.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box/unstrict.json]
+{"compilerOptions":{"strict":false}}
+
+//// [/dev/node_modules/config-box-implied/package.json]
+{"name":"config-box-implied","version":"1.0.0"}
+
+//// [/dev/node_modules/config-box-implied/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box-implied/unstrict/tsconfig.json]
+{"compilerOptions":{"strict":false}}
+
+//// [/dev/supplemental.ts]
+
+
+//// [/dev/tests/baselines/first/output.ts]
+
+
+//// [/dev/tests/scenarios/first.json]
+
+
+//// [/dev/tests/unit/spec.ts]
+
+
+//// [/dev/tests/utils.ts]
+
+
+//// [/dev/tsconfig.extendsBox.json]
+{"extends":"config-box","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImplied.json]
+{"extends":"config-box-implied","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedPath.json]
+{"extends":"config-box-implied/tsconfig.json","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedUnstrict.json]
+{"extends":"config-box-implied/unstrict","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedUnstrictExtension.json]
+{"extends":"config-box-implied/unstrict/tsconfig","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsFoo.json]
+{"extends":"@foo/tsconfig","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsStrict.json]
+{"extends":"config-box/strict","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsStrictExtension.json]
+{"extends":"config-box/strict.json","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsUnStrict.json]
+{"extends":"config-box/unstrict","files":["main.ts"]}
+
+//// [/dev/tsconfig.json]
+{"extends":"./configs/base","files":["main.ts","supplemental.ts"]}
+
+//// [/dev/tsconfig.nostrictnull.json]
+{"extends":"./tsconfig","compilerOptions":{"strictNullChecks":false}}
+
+
+can resolve an extension with a base extension
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "configFilePath": "tsconfig.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts
+Errors::
+
+
+can resolve an extension with a base extension that overrides options
+configFileName:: tsconfig.nostrictnull.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": false,
+ "configFilePath": "tsconfig.nostrictnull.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts
+Errors::
+
+
+can report errors on circular imports
+configFileName:: circular.json
+CompilerOptions::
+{
+ "module": 2,
+ "configFilePath": "circular.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+error TS18000: Circularity detected while resolving configuration: /dev/circular.json -> /dev/circular2.json -> /dev/circular.json
+
+
+can report missing configurations
+configFileName:: missing.json
+CompilerOptions::
+{
+ "types": [],
+ "configFilePath": "missing.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+error TS6053: File './missing2' not found.
+
+
+can report errors in extended configs
+configFileName:: failure.json
+CompilerOptions::
+{
+ "typeRoots": [],
+ "configFilePath": "failure.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+failure2.json:1:2 - error TS6114: Unknown option 'excludes'. Did you mean 'exclude'?
+
+1 {"excludes":["*.js"]}
+   ~~~~~~~~~~
+
+
+can error when 'extends' is not a string or Array
+configFileName:: extends.json
+CompilerOptions::
+{
+ "configFilePath": "extends.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+error TS5024: Compiler option 'extends' requires a value of type string or Array.
+
+
+can error when 'extends' is given an empty string
+configFileName:: extends3.json
+CompilerOptions::
+{
+ "configFilePath": "extends3.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+error TS18051: Compiler option 'extends' cannot be given an empty string.
+
+
+can error when 'extends' is given an empty string in an array
+configFileName:: extends4.json
+CompilerOptions::
+{
+ "configFilePath": "extends4.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+error TS18051: Compiler option 'extends' cannot be given an empty string.
+
+
+can overwrite compiler options using extended 'null'
+configFileName:: configs/third.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "configFilePath": "configs/third.json"
+}
+FileNames::
+/dev/supplemental.ts
+Errors::
+
+
+can overwrite top-level options using extended 'null'
+configFileName:: configs/fourth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "module": 4,
+ "configFilePath": "configs/fourth.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can overwrite top-level files using extended []
+configFileName:: configs/fifth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "module": 4,
+ "configFilePath": "configs/fifth.json"
+}
+FileNames::
+/dev/tests/utils.ts
+Errors::
+
+
+can lookup via tsconfig field
+configFileName:: tsconfig.extendsBox.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBox.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via package-relative path
+configFileName:: tsconfig.extendsStrict.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsStrict.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via non-redirected-to package-relative path
+configFileName:: tsconfig.extendsUnStrict.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsUnStrict.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via package-relative path with extension
+configFileName:: tsconfig.extendsStrictExtension.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsStrictExtension.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig
+configFileName:: tsconfig.extendsBoxImplied.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBoxImplied.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory
+configFileName:: tsconfig.extendsBoxImpliedUnstrict.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsBoxImpliedUnstrict.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory with name
+configFileName:: tsconfig.extendsBoxImpliedUnstrictExtension.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsBoxImpliedUnstrictExtension.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory with extension
+configFileName:: tsconfig.extendsBoxImpliedPath.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBoxImpliedPath.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an package.json exports
+configFileName:: tsconfig.extendsFoo.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsFoo.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can overwrite top-level compilerOptions
+configFileName:: configs/extendsArrayFifth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": false,
+ "strictNullChecks": false,
+ "module": 4,
+ "configFilePath": "configs/extendsArrayFifth.json"
+}
+FileNames::
+
+Errors::
+
+
+can report missing configurations
+configFileName:: extendsArrayFails.json
+CompilerOptions::
+{
+ "types": [],
+ "configFilePath": "extendsArrayFails.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+error TS6053: File './missingFile' not found.
+
+
+can error when 'extends' is not a string or Array2
+configFileName:: extendsArrayFails2.json
+CompilerOptions::
+{
+ "configFilePath": "extendsArrayFails2.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+error TS5024: Compiler option 'extends' requires a value of type string.
+
diff --git a/tests/baselines/reference/config/configurationExtension/under a case sensitive host with jsonSourceFile api.js b/tests/baselines/reference/config/configurationExtension/under a case sensitive host with jsonSourceFile api.js
new file mode 100644
index 0000000000000..d2aefd8f29bbd
--- /dev/null
+++ b/tests/baselines/reference/config/configurationExtension/under a case sensitive host with jsonSourceFile api.js	
@@ -0,0 +1,461 @@
+Fs::
+//// [/dev/circular.json]
+{"extends":"./circular2","compilerOptions":{"module":"amd"}}
+
+//// [/dev/circular2.json]
+{"extends":"./circular","compilerOptions":{"module":"commonjs"}}
+
+//// [/dev/configs/base.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [/dev/configs/extendsArrayFifth.json]
+{"extends":["./extendsArrayFirst","./extendsArraySecond","./extendsArrayThird","./extendsArrayFourth"],"files":[]}
+
+//// [/dev/configs/extendsArrayFirst.json]
+{"compilerOptions":{"allowJs":true,"noImplicitAny":true,"strictNullChecks":true}}
+
+//// [/dev/configs/extendsArrayFourth.json]
+{"compilerOptions":{"module":"system","strictNullChecks":false},"include":null,"files":["../main.ts"]}
+
+//// [/dev/configs/extendsArraySecond.json]
+{"compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [/dev/configs/extendsArrayThird.json]
+{"compilerOptions":{"module":null,"noImplicitAny":false},"extends":"./extendsArrayFirst","include":["../supplemental.*"]}
+
+//// [/dev/configs/fifth.json]
+{"extends":"./fourth","include":["../tests/utils.ts"],"files":[]}
+
+//// [/dev/configs/first.json]
+{"extends":"./base","compilerOptions":{"module":"commonjs"},"files":["../main.ts"]}
+
+//// [/dev/configs/fourth.json]
+{"extends":"./third","compilerOptions":{"module":"system"},"include":null,"files":["../main.ts"]}
+
+//// [/dev/configs/second.json]
+{"extends":"./base","compilerOptions":{"module":"amd"},"include":["../supplemental.*"]}
+
+//// [/dev/configs/tests.json]
+{"compilerOptions":{"preserveConstEnums":true,"removeComments":false,"sourceMap":true},"exclude":["../tests/baselines","../tests/scenarios"],"include":["../tests/**/*.ts"]}
+
+//// [/dev/configs/third.json]
+{"extends":"./second","compilerOptions":{"module":null},"include":["../supplemental.*"]}
+
+//// [/dev/extends.json]
+{"extends":42}
+
+//// [/dev/extends2.json]
+{"extends":"configs/base"}
+
+//// [/dev/extends3.json]
+{"extends":""}
+
+//// [/dev/extends4.json]
+{"extends":[""]}
+
+//// [/dev/extendsArrayFails.json]
+{"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+
+//// [/dev/extendsArrayFails2.json]
+{"extends":[42]}
+
+//// [/dev/failure.json]
+{"extends":"./failure2.json","compilerOptions":{"typeRoots":[]}}
+
+//// [/dev/failure2.json]
+{"excludes":["*.js"]}
+
+//// [/dev/main.ts]
+
+
+//// [/dev/missing.json]
+{"extends":"./missing2","compilerOptions":{"types":[]}}
+
+//// [/dev/node_modules/@foo/tsconfig/package.json]
+{"name":"@foo/tsconfig","version":"1.0.0","exports":{".":"./src/tsconfig.json"}}
+
+//// [/dev/node_modules/@foo/tsconfig/src/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box/package.json]
+{"name":"config-box","version":"1.0.0","tsconfig":"./strict.json"}
+
+//// [/dev/node_modules/config-box/strict.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box/unstrict.json]
+{"compilerOptions":{"strict":false}}
+
+//// [/dev/node_modules/config-box-implied/package.json]
+{"name":"config-box-implied","version":"1.0.0"}
+
+//// [/dev/node_modules/config-box-implied/tsconfig.json]
+{"compilerOptions":{"strict":true}}
+
+//// [/dev/node_modules/config-box-implied/unstrict/tsconfig.json]
+{"compilerOptions":{"strict":false}}
+
+//// [/dev/supplemental.ts]
+
+
+//// [/dev/tests/baselines/first/output.ts]
+
+
+//// [/dev/tests/scenarios/first.json]
+
+
+//// [/dev/tests/unit/spec.ts]
+
+
+//// [/dev/tests/utils.ts]
+
+
+//// [/dev/tsconfig.extendsBox.json]
+{"extends":"config-box","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImplied.json]
+{"extends":"config-box-implied","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedPath.json]
+{"extends":"config-box-implied/tsconfig.json","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedUnstrict.json]
+{"extends":"config-box-implied/unstrict","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsBoxImpliedUnstrictExtension.json]
+{"extends":"config-box-implied/unstrict/tsconfig","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsFoo.json]
+{"extends":"@foo/tsconfig","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsStrict.json]
+{"extends":"config-box/strict","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsStrictExtension.json]
+{"extends":"config-box/strict.json","files":["main.ts"]}
+
+//// [/dev/tsconfig.extendsUnStrict.json]
+{"extends":"config-box/unstrict","files":["main.ts"]}
+
+//// [/dev/tsconfig.json]
+{"extends":"./configs/base","files":["main.ts","supplemental.ts"]}
+
+//// [/dev/tsconfig.nostrictnull.json]
+{"extends":"./tsconfig","compilerOptions":{"strictNullChecks":false}}
+
+
+can resolve an extension with a base extension
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "configFilePath": "tsconfig.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts
+Errors::
+
+
+can resolve an extension with a base extension that overrides options
+configFileName:: tsconfig.nostrictnull.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": false,
+ "configFilePath": "tsconfig.nostrictnull.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts
+Errors::
+
+
+can report errors on circular imports
+configFileName:: circular.json
+CompilerOptions::
+{
+ "module": 2,
+ "configFilePath": "circular.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+error TS18000: Circularity detected while resolving configuration: /dev/circular.json -> /dev/circular2.json -> /dev/circular.json
+
+
+can report missing configurations
+configFileName:: missing.json
+CompilerOptions::
+{
+ "types": [],
+ "configFilePath": "missing.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+missing.json:1:12 - error TS6053: File './missing2' not found.
+
+1 {"extends":"./missing2","compilerOptions":{"types":[]}}
+             ~~~~~~~~~~~~
+
+
+can report errors in extended configs
+configFileName:: failure.json
+CompilerOptions::
+{
+ "typeRoots": [],
+ "configFilePath": "failure.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+failure2.json:1:2 - error TS6114: Unknown option 'excludes'. Did you mean 'exclude'?
+
+1 {"excludes":["*.js"]}
+   ~~~~~~~~~~
+
+
+can error when 'extends' is not a string or Array
+configFileName:: extends.json
+CompilerOptions::
+{
+ "configFilePath": "extends.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+extends.json:1:12 - error TS5024: Compiler option 'extends' requires a value of type string or Array.
+
+1 {"extends":42}
+             ~~
+
+
+can error when 'extends' is given an empty string
+configFileName:: extends3.json
+CompilerOptions::
+{
+ "configFilePath": "extends3.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+extends3.json:1:12 - error TS18051: Compiler option 'extends' cannot be given an empty string.
+
+1 {"extends":""}
+             ~~
+
+
+can error when 'extends' is given an empty string in an array
+configFileName:: extends4.json
+CompilerOptions::
+{
+ "configFilePath": "extends4.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+extends4.json:1:13 - error TS18051: Compiler option 'extends' cannot be given an empty string.
+
+1 {"extends":[""]}
+              ~~
+
+
+can overwrite compiler options using extended 'null'
+configFileName:: configs/third.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "configFilePath": "configs/third.json"
+}
+FileNames::
+/dev/supplemental.ts
+Errors::
+
+
+can overwrite top-level options using extended 'null'
+configFileName:: configs/fourth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "module": 4,
+ "configFilePath": "configs/fourth.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can overwrite top-level files using extended []
+configFileName:: configs/fifth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "module": 4,
+ "configFilePath": "configs/fifth.json"
+}
+FileNames::
+/dev/tests/utils.ts
+Errors::
+
+
+can lookup via tsconfig field
+configFileName:: tsconfig.extendsBox.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBox.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via package-relative path
+configFileName:: tsconfig.extendsStrict.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsStrict.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via non-redirected-to package-relative path
+configFileName:: tsconfig.extendsUnStrict.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsUnStrict.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via package-relative path with extension
+configFileName:: tsconfig.extendsStrictExtension.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsStrictExtension.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig
+configFileName:: tsconfig.extendsBoxImplied.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBoxImplied.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory
+configFileName:: tsconfig.extendsBoxImpliedUnstrict.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsBoxImpliedUnstrict.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory with name
+configFileName:: tsconfig.extendsBoxImpliedUnstrictExtension.json
+CompilerOptions::
+{
+ "strict": false,
+ "configFilePath": "tsconfig.extendsBoxImpliedUnstrictExtension.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an implicit tsconfig in a package-relative directory with extension
+configFileName:: tsconfig.extendsBoxImpliedPath.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsBoxImpliedPath.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can lookup via an package.json exports
+configFileName:: tsconfig.extendsFoo.json
+CompilerOptions::
+{
+ "strict": true,
+ "configFilePath": "tsconfig.extendsFoo.json"
+}
+FileNames::
+/dev/main.ts
+Errors::
+
+
+can overwrite top-level compilerOptions
+configFileName:: configs/extendsArrayFifth.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "noImplicitAny": false,
+ "strictNullChecks": false,
+ "module": 4,
+ "configFilePath": "configs/extendsArrayFifth.json"
+}
+FileNames::
+
+Errors::
+
+
+can report missing configurations
+configFileName:: extendsArrayFails.json
+CompilerOptions::
+{
+ "types": [],
+ "configFilePath": "extendsArrayFails.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+extendsArrayFails.json:1:13 - error TS6053: File './missingFile' not found.
+
+1 {"extends":["./missingFile"],"compilerOptions":{"types":[]}}
+              ~~~~~~~~~~~~~~~
+
+
+can error when 'extends' is not a string or Array2
+configFileName:: extendsArrayFails2.json
+CompilerOptions::
+{
+ "configFilePath": "extendsArrayFails2.json"
+}
+FileNames::
+/dev/main.ts,/dev/supplemental.ts,/dev/tests/utils.ts,/dev/tests/baselines/first/output.ts,/dev/tests/unit/spec.ts
+Errors::
+extendsArrayFails2.json:1:13 - error TS5024: Compiler option 'extends' requires a value of type string.
+
+1 {"extends":[42]}
+              ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Allow trailing comments with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Allow trailing comments with jsonSourceFile api.js
new file mode 100644
index 0000000000000..e2426e5f2c370
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Allow trailing comments with jsonSourceFile api.js	
@@ -0,0 +1,18 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{} // no options
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file as an array with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file as an array with jsonSourceFile api.js
new file mode 100644
index 0000000000000..8dd1abf9d2156
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file as an array with jsonSourceFile api.js	
@@ -0,0 +1,34 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+[{
+            "compilerOptions": {
+                "target": "esnext"
+            }
+        }]
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "target": 99,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:1:1 - error TS5092: The root value of a 'tsconfig.json' file must be an object.
+
+  1 [{
+    ~~
+  2             "compilerOptions": {
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+... 
+  4             }
+    ~~~~~~~~~~~~~
+  5         }]
+    ~~~~~~~~~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file with stray leading characters with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file with stray leading characters with jsonSourceFile api.js
new file mode 100644
index 0000000000000..c279e51a5fb6c
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file with stray leading characters with jsonSourceFile api.js	
@@ -0,0 +1,27 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+blah {
+            "compilerOptions": {
+                "target": "esnext"
+            }
+        }
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "target": 99,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:1:1 - error TS1136: Property assignment expected.
+
+1 blah {
+  ~~~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file with stray trailing characters with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file with stray trailing characters with jsonSourceFile api.js
new file mode 100644
index 0000000000000..576fd7db78e77
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert a tsconfig file with stray trailing characters with jsonSourceFile api.js	
@@ -0,0 +1,34 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+            "compilerOptions": {
+                "target": "esnext"
+            }
+        } blah
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "target": 99,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:1:1 - error TS5092: The root value of a 'tsconfig.json' file must be an object.
+
+  1 {
+    ~
+  2             "compilerOptions": {
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+... 
+  4             }
+    ~~~~~~~~~~~~~
+  5         } blah
+    ~~~~~~~~~~~~~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json to compiler-options with json api.js
new file mode 100644
index 0000000000000..1e8650209fa0c
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json to compiler-options with json api.js	
@@ -0,0 +1,44 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "es2015.symbol"
+  ]
+ }
+}
+
+
+configFileName:: jsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "maxNodeModuleJsDepth": 2,
+ "allowSyntheticDefaultImports": true,
+ "skipLibCheck": true,
+ "noEmit": true,
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts",
+  "lib.es2015.symbol.d.ts"
+ ],
+ "configFilePath": "jsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..1e8650209fa0c
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,44 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "es2015.symbol"
+  ]
+ }
+}
+
+
+configFileName:: jsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "maxNodeModuleJsDepth": 2,
+ "allowSyntheticDefaultImports": true,
+ "skipLibCheck": true,
+ "noEmit": true,
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts",
+  "lib.es2015.symbol.d.ts"
+ ],
+ "configFilePath": "jsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json with allowJs is false to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json with allowJs is false to compiler-options with json api.js
new file mode 100644
index 0000000000000..3c67eb6c08cd2
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json with allowJs is false to compiler-options with json api.js	
@@ -0,0 +1,45 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "allowJs": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "es2015.symbol"
+  ]
+ }
+}
+
+
+configFileName:: jsconfig.json
+CompilerOptions::
+{
+ "allowJs": false,
+ "maxNodeModuleJsDepth": 2,
+ "allowSyntheticDefaultImports": true,
+ "skipLibCheck": true,
+ "noEmit": true,
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts",
+  "lib.es2015.symbol.d.ts"
+ ],
+ "configFilePath": "jsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json with allowJs is false to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json with allowJs is false to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..3c67eb6c08cd2
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format jsconfig.json with allowJs is false to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,45 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "allowJs": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "es2015.symbol"
+  ]
+ }
+}
+
+
+configFileName:: jsconfig.json
+CompilerOptions::
+{
+ "allowJs": false,
+ "maxNodeModuleJsDepth": 2,
+ "allowSyntheticDefaultImports": true,
+ "skipLibCheck": true,
+ "noEmit": true,
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts",
+  "lib.es2015.symbol.d.ts"
+ ],
+ "configFilePath": "jsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json to compiler-options with json api.js
new file mode 100644
index 0000000000000..4b35dd8cc8a1b
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json to compiler-options with json api.js	
@@ -0,0 +1,39 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "es2015.symbol"
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts",
+  "lib.es2015.symbol.d.ts"
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..4b35dd8cc8a1b
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,39 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "es2015.symbol"
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts",
+  "lib.es2015.symbol.d.ts"
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json with allowJs is false to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json with allowJs is false to compiler-options with json api.js
new file mode 100644
index 0000000000000..24bfd8aeed5fa
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json with allowJs is false to compiler-options with json api.js	
@@ -0,0 +1,41 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "allowJs": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "es2015.symbol"
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "allowJs": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts",
+  "lib.es2015.symbol.d.ts"
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json with allowJs is false to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json with allowJs is false to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..24bfd8aeed5fa
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert correctly format tsconfig.json with allowJs is false to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,41 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "allowJs": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "es2015.symbol"
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "allowJs": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts",
+  "lib.es2015.symbol.d.ts"
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default jsconfig.json to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default jsconfig.json to compiler-options with json api.js
new file mode 100644
index 0000000000000..02ee479e8cdab
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default jsconfig.json to compiler-options with json api.js	
@@ -0,0 +1,23 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{}
+
+
+configFileName:: jsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "maxNodeModuleJsDepth": 2,
+ "allowSyntheticDefaultImports": true,
+ "skipLibCheck": true,
+ "noEmit": true,
+ "configFilePath": "jsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default jsconfig.json to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default jsconfig.json to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..02ee479e8cdab
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default jsconfig.json to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,23 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{}
+
+
+configFileName:: jsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "maxNodeModuleJsDepth": 2,
+ "allowSyntheticDefaultImports": true,
+ "skipLibCheck": true,
+ "noEmit": true,
+ "configFilePath": "jsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default tsconfig.json to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default tsconfig.json to compiler-options with json api.js
new file mode 100644
index 0000000000000..0890fd9558614
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default tsconfig.json to compiler-options with json api.js	
@@ -0,0 +1,18 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default tsconfig.json to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default tsconfig.json to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..0890fd9558614
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert default tsconfig.json to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,18 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of libs to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of libs to compiler-options with json api.js
new file mode 100644
index 0000000000000..a11242e30a573
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of libs to compiler-options with json api.js	
@@ -0,0 +1,31 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": []
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of libs to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of libs to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..a11242e30a573
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of libs to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,31 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": []
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of moduleSuffixes to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of moduleSuffixes to compiler-options with json api.js
new file mode 100644
index 0000000000000..93647f7bdea8d
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of moduleSuffixes to compiler-options with json api.js	
@@ -0,0 +1,23 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleSuffixes": []
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "moduleSuffixes": [],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of moduleSuffixes to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of moduleSuffixes to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..93647f7bdea8d
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty option of moduleSuffixes to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,23 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleSuffixes": []
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "moduleSuffixes": [],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs array to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs array to compiler-options with json api.js
new file mode 100644
index 0000000000000..cfea7b850cac9
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs array to compiler-options with json api.js	
@@ -0,0 +1,34 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   ""
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'es2023', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'webworker.iterable', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asyncgenerator', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'es2019.array', 'es2019.object', 'es2019.string', 'es2019.symbol', 'es2019.intl', 'es2020.bigint', 'es2020.date', 'es2020.promise', 'es2020.sharedmemory', 'es2020.string', 'es2020.symbol.wellknown', 'es2020.intl', 'es2020.number', 'es2021.promise', 'es2021.string', 'es2021.weakref', 'es2021.intl', 'es2022.array', 'es2022.error', 'es2022.intl', 'es2022.object', 'es2022.sharedmemory', 'es2022.string', 'es2022.regexp', 'es2023.array', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise', 'esnext.weakref', 'decorators', 'decorators.legacy'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs array to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs array to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..e089538098176
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs array to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,37 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   ""
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:8:4 - error TS6046: Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'es2023', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'webworker.iterable', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asyncgenerator', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'es2019.array', 'es2019.object', 'es2019.string', 'es2019.symbol', 'es2019.intl', 'es2020.bigint', 'es2020.date', 'es2020.promise', 'es2020.sharedmemory', 'es2020.string', 'es2020.symbol.wellknown', 'es2020.intl', 'es2020.number', 'es2021.promise', 'es2021.string', 'es2021.weakref', 'es2021.intl', 'es2022.array', 'es2022.error', 'es2022.intl', 'es2022.object', 'es2022.sharedmemory', 'es2022.string', 'es2022.regexp', 'es2023.array', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise', 'esnext.weakref', 'decorators', 'decorators.legacy'.
+
+8    ""
+     ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs to compiler-options with json api.js
new file mode 100644
index 0000000000000..021162067c7bc
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs to compiler-options with json api.js	
@@ -0,0 +1,37 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "es5",
+   ""
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts"
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'es2023', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'webworker.iterable', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asyncgenerator', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'es2019.array', 'es2019.object', 'es2019.string', 'es2019.symbol', 'es2019.intl', 'es2020.bigint', 'es2020.date', 'es2020.promise', 'es2020.sharedmemory', 'es2020.string', 'es2020.symbol.wellknown', 'es2020.intl', 'es2020.number', 'es2021.promise', 'es2021.string', 'es2021.weakref', 'es2021.intl', 'es2022.array', 'es2022.error', 'es2022.intl', 'es2022.object', 'es2022.sharedmemory', 'es2022.string', 'es2022.regexp', 'es2023.array', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise', 'esnext.weakref', 'decorators', 'decorators.legacy'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..5800ae86e6bdb
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of libs to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,40 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "es5",
+   ""
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts"
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:9:4 - error TS6046: Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'es2023', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'webworker.iterable', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asyncgenerator', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'es2019.array', 'es2019.object', 'es2019.string', 'es2019.symbol', 'es2019.intl', 'es2020.bigint', 'es2020.date', 'es2020.promise', 'es2020.sharedmemory', 'es2020.string', 'es2020.symbol.wellknown', 'es2020.intl', 'es2020.number', 'es2021.promise', 'es2021.string', 'es2021.weakref', 'es2021.intl', 'es2022.array', 'es2022.error', 'es2022.intl', 'es2022.object', 'es2022.sharedmemory', 'es2022.string', 'es2022.regexp', 'es2023.array', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise', 'esnext.weakref', 'decorators', 'decorators.legacy'.
+
+9    ""
+     ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes single to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes single to compiler-options with json api.js
new file mode 100644
index 0000000000000..08442f6d71de5
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes single to compiler-options with json api.js	
@@ -0,0 +1,27 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleSuffixes": [
+   ""
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "moduleSuffixes": [
+  ""
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes single to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes single to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..08442f6d71de5
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes single to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,27 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleSuffixes": [
+   ""
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "moduleSuffixes": [
+  ""
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes to compiler-options with json api.js
new file mode 100644
index 0000000000000..52ced41a915bd
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes to compiler-options with json api.js	
@@ -0,0 +1,29 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleSuffixes": [
+   ".ios",
+   ""
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "moduleSuffixes": [
+  ".ios",
+  ""
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..52ced41a915bd
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert empty string option of moduleSuffixes to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,29 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleSuffixes": [
+   ".ios",
+   ""
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "moduleSuffixes": [
+  ".ios",
+  ""
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of jsx to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of jsx to compiler-options with json api.js
new file mode 100644
index 0000000000000..cf59459a5d22c
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of jsx to compiler-options with json api.js	
@@ -0,0 +1,31 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "jsx": ""
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--jsx' option must be: 'preserve', 'react-native', 'react', 'react-jsx', 'react-jsxdev'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of jsx to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of jsx to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..054fd96490174
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of jsx to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,34 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "jsx": ""
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:7:10 - error TS6046: Argument for '--jsx' option must be: 'preserve', 'react-native', 'react', 'react-jsx', 'react-jsxdev'.
+
+7   "jsx": ""
+           ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of libs to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of libs to compiler-options with json api.js
new file mode 100644
index 0000000000000..df1ad098ca048
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of libs to compiler-options with json api.js	
@@ -0,0 +1,39 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "incorrectLib"
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts"
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'es2023', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'webworker.iterable', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asyncgenerator', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'es2019.array', 'es2019.object', 'es2019.string', 'es2019.symbol', 'es2019.intl', 'es2020.bigint', 'es2020.date', 'es2020.promise', 'es2020.sharedmemory', 'es2020.string', 'es2020.symbol.wellknown', 'es2020.intl', 'es2020.number', 'es2021.promise', 'es2021.string', 'es2021.weakref', 'es2021.intl', 'es2022.array', 'es2022.error', 'es2022.intl', 'es2022.object', 'es2022.sharedmemory', 'es2022.string', 'es2022.regexp', 'es2023.array', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise', 'esnext.weakref', 'decorators', 'decorators.legacy'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of libs to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of libs to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..5bffe79451e76
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of libs to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,42 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "es5",
+   "es2015.core",
+   "incorrectLib"
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [
+  "lib.es5.d.ts",
+  "lib.es2015.core.d.ts"
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:10:4 - error TS6046: Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'es2023', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'webworker.iterable', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asyncgenerator', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'es2019.array', 'es2019.object', 'es2019.string', 'es2019.symbol', 'es2019.intl', 'es2020.bigint', 'es2020.date', 'es2020.promise', 'es2020.sharedmemory', 'es2020.string', 'es2020.symbol.wellknown', 'es2020.intl', 'es2020.number', 'es2021.promise', 'es2021.string', 'es2021.weakref', 'es2021.intl', 'es2022.array', 'es2022.error', 'es2022.intl', 'es2022.object', 'es2022.sharedmemory', 'es2022.string', 'es2022.regexp', 'es2023.array', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise', 'esnext.weakref', 'decorators', 'decorators.legacy'.
+
+10    "incorrectLib"
+      ~~~~~~~~~~~~~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module to compiler-options with json api.js
new file mode 100644
index 0000000000000..3f98e11569243
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module to compiler-options with json api.js	
@@ -0,0 +1,29 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..cb967c5a0a366
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,32 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:3:13 - error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
+
+3   "module": "",
+              ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module-resolution to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module-resolution to compiler-options with json api.js
new file mode 100644
index 0000000000000..363c7ebffb694
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module-resolution to compiler-options with json api.js	
@@ -0,0 +1,27 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleResolution": "",
+  "noImplicitAny": false,
+  "sourceMap": false
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--moduleResolution' option must be: 'node10', 'classic', 'node16', 'nodenext', 'bundler'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module-resolution to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module-resolution to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..9085f8a5386e2
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of module-resolution to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,30 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleResolution": "",
+  "noImplicitAny": false,
+  "sourceMap": false
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:3:23 - error TS6046: Argument for '--moduleResolution' option must be: 'node10', 'classic', 'node16', 'nodenext', 'bundler'.
+
+3   "moduleResolution": "",
+                        ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of newLine to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of newLine to compiler-options with json api.js
new file mode 100644
index 0000000000000..f30c5f75816e2
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of newLine to compiler-options with json api.js	
@@ -0,0 +1,29 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "newLine": "",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--newLine' option must be: 'crlf', 'lf'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of newLine to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of newLine to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..0e68f7a123d4f
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of newLine to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,32 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "newLine": "",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:3:14 - error TS6046: Argument for '--newLine' option must be: 'crlf', 'lf'.
+
+3   "newLine": "",
+               ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of target to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of target to compiler-options with json api.js
new file mode 100644
index 0000000000000..92a98d406fe72
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of target to compiler-options with json api.js	
@@ -0,0 +1,27 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "target": "",
+  "noImplicitAny": false,
+  "sourceMap": false
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--target' option must be: 'es3', 'es5', 'es6', 'es2015', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'esnext'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of target to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of target to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..6389e6a9a69f9
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrect option of target to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,30 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "target": "",
+  "noImplicitAny": false,
+  "sourceMap": false
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:3:13 - error TS6046: Argument for '--target' option must be: 'es3', 'es5', 'es6', 'es2015', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'esnext'.
+
+3   "target": "",
+              ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format jsconfig.json to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format jsconfig.json to compiler-options with json api.js
new file mode 100644
index 0000000000000..d83c6e50cd9ca
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format jsconfig.json to compiler-options with json api.js	
@@ -0,0 +1,28 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "compilerOptions": {
+  "modu": "commonjs"
+ }
+}
+
+
+configFileName:: jsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "maxNodeModuleJsDepth": 2,
+ "allowSyntheticDefaultImports": true,
+ "skipLibCheck": true,
+ "noEmit": true,
+ "configFilePath": "jsconfig.json"
+}
+Errors::
+error TS5023: Unknown compiler option 'modu'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format jsconfig.json to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format jsconfig.json to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..d20b5a9728363
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format jsconfig.json to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,31 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "compilerOptions": {
+  "modu": "commonjs"
+ }
+}
+
+
+configFileName:: jsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "maxNodeModuleJsDepth": 2,
+ "allowSyntheticDefaultImports": true,
+ "skipLibCheck": true,
+ "noEmit": true,
+ "configFilePath": "jsconfig.json"
+}
+Errors::
+jsconfig.json:3:3 - error TS5023: Unknown compiler option 'modu'.
+
+3   "modu": "commonjs"
+    ~~~~~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format tsconfig.json to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format tsconfig.json to compiler-options with json api.js
new file mode 100644
index 0000000000000..34697eac42e1c
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format tsconfig.json to compiler-options with json api.js	
@@ -0,0 +1,23 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "modu": "commonjs"
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS5023: Unknown compiler option 'modu'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format tsconfig.json to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format tsconfig.json to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..15f0de5e8f9f6
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert incorrectly format tsconfig.json to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,26 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "modu": "commonjs"
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:3:3 - error TS5023: Unknown compiler option 'modu'.
+
+3   "modu": "commonjs"
+    ~~~~~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert negative numbers in tsconfig.json with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert negative numbers in tsconfig.json with json api.js
new file mode 100644
index 0000000000000..814f4b9bf6dec
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert negative numbers in tsconfig.json with json api.js	
@@ -0,0 +1,25 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "allowJs": true,
+  "maxNodeModuleJsDepth": -1
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "maxNodeModuleJsDepth": -1,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert negative numbers in tsconfig.json with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert negative numbers in tsconfig.json with jsonSourceFile api.js
new file mode 100644
index 0000000000000..814f4b9bf6dec
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert negative numbers in tsconfig.json with jsonSourceFile api.js	
@@ -0,0 +1,25 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "allowJs": true,
+  "maxNodeModuleJsDepth": -1
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "allowJs": true,
+ "maxNodeModuleJsDepth": -1,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of libs to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of libs to compiler-options with json api.js
new file mode 100644
index 0000000000000..82972a4551433
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of libs to compiler-options with json api.js	
@@ -0,0 +1,34 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "   "
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+error TS6046: Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'es2023', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'webworker.iterable', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asyncgenerator', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'es2019.array', 'es2019.object', 'es2019.string', 'es2019.symbol', 'es2019.intl', 'es2020.bigint', 'es2020.date', 'es2020.promise', 'es2020.sharedmemory', 'es2020.string', 'es2020.symbol.wellknown', 'es2020.intl', 'es2020.number', 'es2021.promise', 'es2021.string', 'es2021.weakref', 'es2021.intl', 'es2022.array', 'es2022.error', 'es2022.intl', 'es2022.object', 'es2022.sharedmemory', 'es2022.string', 'es2022.regexp', 'es2023.array', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise', 'esnext.weakref', 'decorators', 'decorators.legacy'.
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of libs to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of libs to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..da2cbcca93db7
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of libs to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,37 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "module": "commonjs",
+  "target": "es5",
+  "noImplicitAny": false,
+  "sourceMap": false,
+  "lib": [
+   "   "
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 1,
+ "target": 1,
+ "noImplicitAny": false,
+ "sourceMap": false,
+ "lib": [],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:8:4 - error TS6046: Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'es2023', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'webworker.iterable', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.asyncgenerator', 'es2018.asynciterable', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'es2019.array', 'es2019.object', 'es2019.string', 'es2019.symbol', 'es2019.intl', 'es2020.bigint', 'es2020.date', 'es2020.promise', 'es2020.sharedmemory', 'es2020.string', 'es2020.symbol.wellknown', 'es2020.intl', 'es2020.number', 'es2021.promise', 'es2021.string', 'es2021.weakref', 'es2021.intl', 'es2022.array', 'es2022.error', 'es2022.intl', 'es2022.object', 'es2022.sharedmemory', 'es2022.string', 'es2022.regexp', 'es2023.array', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable', 'esnext.intl', 'esnext.bigint', 'esnext.string', 'esnext.promise', 'esnext.weakref', 'decorators', 'decorators.legacy'.
+
+8    "   "
+     ~~~~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of moduleSuffixes to compiler-options with json api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of moduleSuffixes to compiler-options with json api.js
new file mode 100644
index 0000000000000..082ae9d08bdc7
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of moduleSuffixes to compiler-options with json api.js	
@@ -0,0 +1,27 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleSuffixes": [
+   "   "
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "moduleSuffixes": [
+  "   "
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of moduleSuffixes to compiler-options with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of moduleSuffixes to compiler-options with jsonSourceFile api.js
new file mode 100644
index 0000000000000..082ae9d08bdc7
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert trailing-whitespace string option of moduleSuffixes to compiler-options with jsonSourceFile api.js	
@@ -0,0 +1,27 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "compilerOptions": {
+  "moduleSuffixes": [
+   "   "
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "moduleSuffixes": [
+  "   "
+ ],
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert tsconfig options when there are multiple invalid strings with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert tsconfig options when there are multiple invalid strings with jsonSourceFile api.js
new file mode 100644
index 0000000000000..d2a216a02e2c7
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Convert tsconfig options when there are multiple invalid strings with jsonSourceFile api.js	
@@ -0,0 +1,114 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+  "compilerOptions": {
+    "target": "<%- options.useTsWithBabel ? 'esnext' : 'es5' %>",
+    "module": "esnext",
+    <%_ if (options.classComponent) { _%>
+    "experimentalDecorators": true,
+    <%_ } _%>
+    "sourceMap": true,
+    "types": [
+      "webpack-env"<% if (hasMocha || hasJest) { %>,<% } %>
+      <%_ if (hasMocha) { _%>
+      "mocha",
+      "chai"
+      <%_ } else if (hasJest) { _%>
+      "jest"
+      <%_ } _%>
+    ]
+  }
+}
+
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 99,
+ "experimentalDecorators": true,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:1:1 - error TS5092: The root value of a 'tsconfig.json' file must be an object.
+
+  1 {
+    ~
+  2   "compilerOptions": {
+    ~~~~~~~~~~~~~~~~~~~~~~
+... 
+ 18   }
+    ~~~
+ 19 }
+    ~
+tsconfig.json:3:15 - error TS6046: Argument for '--target' option must be: 'es3', 'es5', 'es6', 'es2015', 'es2016', 'es2017', 'es2018', 'es2019', 'es2020', 'es2021', 'es2022', 'esnext'.
+
+3     "target": "<%- options.useTsWithBabel ? 'esnext' : 'es5' %>",
+                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+tsconfig.json:5:7 - error TS1136: Property assignment expected.
+
+5     <%_ if (options.classComponent) { _%>
+        ~
+tsconfig.json:5:9 - error TS1136: Property assignment expected.
+
+5     <%_ if (options.classComponent) { _%>
+          ~~
+tsconfig.json:5:20 - error TS1327: String literal with double quotes expected.
+
+5     <%_ if (options.classComponent) { _%>
+                     
+tsconfig.json:5:20 - error TS1328: Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal.
+
+5     <%_ if (options.classComponent) { _%>
+                     ~~~~~~~~~~~~~~~
+tsconfig.json:5:39 - error TS1136: Property assignment expected.
+
+5     <%_ if (options.classComponent) { _%>
+                                        ~
+tsconfig.json:7:7 - error TS1136: Property assignment expected.
+
+7     <%_ } _%>
+        ~
+tsconfig.json:7:11 - error TS1136: Property assignment expected.
+
+7     <%_ } _%>
+            ~
+tsconfig.json:10:7 - error TS1328: Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal.
+
+10       "webpack-env"<% if (hasMocha || hasJest) { %>,<% } %>
+         ~~~~~~~~~~~~~~~
+tsconfig.json:10:23 - error TS1136: Property assignment expected.
+
+10       "webpack-env"<% if (hasMocha || hasJest) { %>,<% } %>
+                         ~~
+tsconfig.json:11:9 - error TS1136: Property assignment expected.
+
+11       <%_ if (hasMocha) { _%>
+           ~
+tsconfig.json:11:11 - error TS1136: Property assignment expected.
+
+11       <%_ if (hasMocha) { _%>
+             ~~
+tsconfig.json:14:13 - error TS1327: String literal with double quotes expected.
+
+14       <%_ } else if (hasJest) { _%>
+               ~~~~
+tsconfig.json:14:17 - error TS1328: Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal.
+
+14       <%_ } else if (hasJest) { _%>
+                   
+tsconfig.json:14:18 - error TS1136: Property assignment expected.
+
+14       <%_ } else if (hasJest) { _%>
+                    ~~
+tsconfig.json:16:13 - error TS1136: Property assignment expected.
+
+16       <%_ } _%>
+               ~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/Don't crash when root expression is not object at all with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Don't crash when root expression is not object at all with jsonSourceFile api.js
new file mode 100644
index 0000000000000..8ee271bbee883
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/Don't crash when root expression is not object at all with jsonSourceFile api.js	
@@ -0,0 +1,22 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+42
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:1:1 - error TS5092: The root value of a 'tsconfig.json' file must be an object.
+
+1 42
+  ~~
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/does not raise an error if you've set a compiler flag in the root when you have included 'compilerOptions' with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/does not raise an error if you've set a compiler flag in the root when you have included 'compilerOptions' with jsonSourceFile api.js
new file mode 100644
index 0000000000000..269283eb9d5f4
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/does not raise an error if you've set a compiler flag in the root when you have included 'compilerOptions' with jsonSourceFile api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+            "target": "esnext",
+            "compilerOptions": {
+                "module": "esnext"
+            }
+        }
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "module": 99,
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertCompilerOptionsFromJson/raises an error if you've set a compiler flag in the root without including compilerOptions with jsonSourceFile api.js b/tests/baselines/reference/config/convertCompilerOptionsFromJson/raises an error if you've set a compiler flag in the root without including compilerOptions with jsonSourceFile api.js
new file mode 100644
index 0000000000000..64ecb5e2fc619
--- /dev/null
+++ b/tests/baselines/reference/config/convertCompilerOptionsFromJson/raises an error if you've set a compiler flag in the root without including compilerOptions with jsonSourceFile api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+            "module": "esnext",
+        }
+
+
+configFileName:: tsconfig.json
+CompilerOptions::
+{
+ "configFilePath": "tsconfig.json"
+}
+Errors::
+tsconfig.json:2:13 - error TS6258: 'module' should be set inside the 'compilerOptions' object of the config json file
+
+2             "module": "esnext",
+              ~~~~~~~~
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert correctly format tsconfig.json to typeAcquisition  with json api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert correctly format tsconfig.json to typeAcquisition  with json api.js
new file mode 100644
index 0000000000000..95ff0f2309aee
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert correctly format tsconfig.json to typeAcquisition  with json api.js	
@@ -0,0 +1,38 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "typeAcquisition": {
+  "enable": true,
+  "include": [
+   "0.d.ts",
+   "1.d.ts"
+  ],
+  "exclude": [
+   "0.js",
+   "1.js"
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+TypeAcquisition::
+{
+ "enable": true,
+ "include": [
+  "0.d.ts",
+  "1.d.ts"
+ ],
+ "exclude": [
+  "0.js",
+  "1.js"
+ ]
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert correctly format tsconfig.json to typeAcquisition  with jsonSourceFile api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert correctly format tsconfig.json to typeAcquisition  with jsonSourceFile api.js
new file mode 100644
index 0000000000000..95ff0f2309aee
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert correctly format tsconfig.json to typeAcquisition  with jsonSourceFile api.js	
@@ -0,0 +1,38 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "typeAcquisition": {
+  "enable": true,
+  "include": [
+   "0.d.ts",
+   "1.d.ts"
+  ],
+  "exclude": [
+   "0.js",
+   "1.js"
+  ]
+ }
+}
+
+
+configFileName:: tsconfig.json
+TypeAcquisition::
+{
+ "enable": true,
+ "include": [
+  "0.d.ts",
+  "1.d.ts"
+ ],
+ "exclude": [
+  "0.js",
+  "1.js"
+ ]
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default jsconfig.json to typeAcquisition  with json api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default jsconfig.json to typeAcquisition  with json api.js
new file mode 100644
index 0000000000000..868fb7743ddd7
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default jsconfig.json to typeAcquisition  with json api.js	
@@ -0,0 +1,20 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{}
+
+
+configFileName:: jsconfig.json
+TypeAcquisition::
+{
+ "enable": true,
+ "include": [],
+ "exclude": []
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default jsconfig.json to typeAcquisition  with jsonSourceFile api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default jsconfig.json to typeAcquisition  with jsonSourceFile api.js
new file mode 100644
index 0000000000000..868fb7743ddd7
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default jsconfig.json to typeAcquisition  with jsonSourceFile api.js	
@@ -0,0 +1,20 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{}
+
+
+configFileName:: jsconfig.json
+TypeAcquisition::
+{
+ "enable": true,
+ "include": [],
+ "exclude": []
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default tsconfig.json to typeAcquisition  with json api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default tsconfig.json to typeAcquisition  with json api.js
new file mode 100644
index 0000000000000..4b98a66335b00
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default tsconfig.json to typeAcquisition  with json api.js	
@@ -0,0 +1,20 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
+TypeAcquisition::
+{
+ "enable": false,
+ "include": [],
+ "exclude": []
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default tsconfig.json to typeAcquisition  with jsonSourceFile api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default tsconfig.json to typeAcquisition  with jsonSourceFile api.js
new file mode 100644
index 0000000000000..4b98a66335b00
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert default tsconfig.json to typeAcquisition  with jsonSourceFile api.js	
@@ -0,0 +1,20 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
+TypeAcquisition::
+{
+ "enable": false,
+ "include": [],
+ "exclude": []
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format jsconfig.json to typeAcquisition  with json api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format jsconfig.json to typeAcquisition  with json api.js
new file mode 100644
index 0000000000000..f93cdebf07dd0
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format jsconfig.json to typeAcquisition  with json api.js	
@@ -0,0 +1,25 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "typeAcquisition": {
+  "enableAutoDiscovy": true
+ }
+}
+
+
+configFileName:: jsconfig.json
+TypeAcquisition::
+{
+ "enable": true,
+ "include": [],
+ "exclude": []
+}
+Errors::
+error TS17010: Unknown type acquisition option 'enableAutoDiscovy'.
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format jsconfig.json to typeAcquisition  with jsonSourceFile api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format jsconfig.json to typeAcquisition  with jsonSourceFile api.js
new file mode 100644
index 0000000000000..fdb27fee0f535
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format jsconfig.json to typeAcquisition  with jsonSourceFile api.js	
@@ -0,0 +1,28 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "typeAcquisition": {
+  "enableAutoDiscovy": true
+ }
+}
+
+
+configFileName:: jsconfig.json
+TypeAcquisition::
+{
+ "enable": true,
+ "include": [],
+ "exclude": []
+}
+Errors::
+jsconfig.json:3:3 - error TS17010: Unknown type acquisition option 'enableAutoDiscovy'.
+
+3   "enableAutoDiscovy": true
+    ~~~~~~~~~~~~~~~~~~~
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format tsconfig.json to typeAcquisition  with json api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format tsconfig.json to typeAcquisition  with json api.js
new file mode 100644
index 0000000000000..ec3afbb22bac9
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format tsconfig.json to typeAcquisition  with json api.js	
@@ -0,0 +1,25 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "typeAcquisition": {
+  "enableAutoDiscovy": true
+ }
+}
+
+
+configFileName:: tsconfig.json
+TypeAcquisition::
+{
+ "enable": false,
+ "include": [],
+ "exclude": []
+}
+Errors::
+error TS17010: Unknown type acquisition option 'enableAutoDiscovy'.
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format tsconfig.json to typeAcquisition  with jsonSourceFile api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format tsconfig.json to typeAcquisition  with jsonSourceFile api.js
new file mode 100644
index 0000000000000..b2e3f9703ca17
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert incorrect format tsconfig.json to typeAcquisition  with jsonSourceFile api.js	
@@ -0,0 +1,28 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "typeAcquisition": {
+  "enableAutoDiscovy": true
+ }
+}
+
+
+configFileName:: tsconfig.json
+TypeAcquisition::
+{
+ "enable": false,
+ "include": [],
+ "exclude": []
+}
+Errors::
+tsconfig.json:3:3 - error TS17010: Unknown type acquisition option 'enableAutoDiscovy'.
+
+3   "enableAutoDiscovy": true
+    ~~~~~~~~~~~~~~~~~~~
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json to typeAcquisition  with json api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json to typeAcquisition  with json api.js
new file mode 100644
index 0000000000000..654798085f9a5
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json to typeAcquisition  with json api.js	
@@ -0,0 +1,34 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "typeAcquisition": {
+  "enable": false,
+  "include": [
+   "0.d.ts"
+  ],
+  "exclude": [
+   "0.js"
+  ]
+ }
+}
+
+
+configFileName:: jsconfig.json
+TypeAcquisition::
+{
+ "enable": false,
+ "include": [
+  "0.d.ts"
+ ],
+ "exclude": [
+  "0.js"
+ ]
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json to typeAcquisition  with jsonSourceFile api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json to typeAcquisition  with jsonSourceFile api.js
new file mode 100644
index 0000000000000..654798085f9a5
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json to typeAcquisition  with jsonSourceFile api.js	
@@ -0,0 +1,34 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "typeAcquisition": {
+  "enable": false,
+  "include": [
+   "0.d.ts"
+  ],
+  "exclude": [
+   "0.js"
+  ]
+ }
+}
+
+
+configFileName:: jsconfig.json
+TypeAcquisition::
+{
+ "enable": false,
+ "include": [
+  "0.d.ts"
+ ],
+ "exclude": [
+  "0.js"
+ ]
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json with only enable property to typeAcquisition  with json api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json with only enable property to typeAcquisition  with json api.js
new file mode 100644
index 0000000000000..c5b848a23b502
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json with only enable property to typeAcquisition  with json api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "typeAcquisition": {
+  "enable": false
+ }
+}
+
+
+configFileName:: jsconfig.json
+TypeAcquisition::
+{
+ "enable": false,
+ "include": [],
+ "exclude": []
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json with only enable property to typeAcquisition  with jsonSourceFile api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json with only enable property to typeAcquisition  with jsonSourceFile api.js
new file mode 100644
index 0000000000000..c5b848a23b502
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert jsconfig.json with only enable property to typeAcquisition  with jsonSourceFile api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/jsconfig.json]
+{
+ "typeAcquisition": {
+  "enable": false
+ }
+}
+
+
+configFileName:: jsconfig.json
+TypeAcquisition::
+{
+ "enable": false,
+ "include": [],
+ "exclude": []
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert tsconfig.json with only enable property to typeAcquisition  with json api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert tsconfig.json with only enable property to typeAcquisition  with json api.js
new file mode 100644
index 0000000000000..e9cfcace7b526
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert tsconfig.json with only enable property to typeAcquisition  with json api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "typeAcquisition": {
+  "enable": true
+ }
+}
+
+
+configFileName:: tsconfig.json
+TypeAcquisition::
+{
+ "enable": true,
+ "include": [],
+ "exclude": []
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert tsconfig.json with only enable property to typeAcquisition  with jsonSourceFile api.js b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert tsconfig.json with only enable property to typeAcquisition  with jsonSourceFile api.js
new file mode 100644
index 0000000000000..e9cfcace7b526
--- /dev/null
+++ b/tests/baselines/reference/config/convertTypeAcquisitionFromJson/Convert tsconfig.json with only enable property to typeAcquisition  with jsonSourceFile api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/b.js]
+
+
+//// [/apath/tsconfig.json]
+{
+ "typeAcquisition": {
+  "enable": true
+ }
+}
+
+
+configFileName:: tsconfig.json
+TypeAcquisition::
+{
+ "enable": true,
+ "include": [],
+ "exclude": []
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/Expands z to z/starstart/star with json api.js b/tests/baselines/reference/config/matchFiles/Expands z to z/starstart/star with json api.js
new file mode 100644
index 0000000000000..3998377aab051
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/Expands z to z/starstart/star with json api.js	
@@ -0,0 +1,109 @@
+config:
+{
+ "include": [
+  "z"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/z/a.ts",
+  "c:/dev/z/aba.ts",
+  "c:/dev/z/abz.ts",
+  "c:/dev/z/b.ts",
+  "c:/dev/z/bba.ts",
+  "c:/dev/z/bbz.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "z"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/z": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/Expands z to z/starstart/star with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/Expands z to z/starstart/star with jsonSourceFile api.js
new file mode 100644
index 0000000000000..57ebdd5c647c4
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/Expands z to z/starstart/star with jsonSourceFile api.js	
@@ -0,0 +1,108 @@
+config:
+{
+ "include": [
+  "z"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/z/a.ts",
+  "c:/dev/z/aba.ts",
+  "c:/dev/z/abz.ts",
+  "c:/dev/z/b.ts",
+  "c:/dev/z/bba.ts",
+  "c:/dev/z/bbz.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "z"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/z": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/always include literal files with json api.js b/tests/baselines/reference/config/matchFiles/always include literal files with json api.js
new file mode 100644
index 0000000000000..a80b94f9b6868
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/always include literal files with json api.js	
@@ -0,0 +1,116 @@
+config:
+{
+ "files": [
+  "a.ts"
+ ],
+ "include": [
+  "*/z.ts"
+ ],
+ "exclude": [
+  "**/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "files": [
+   "a.ts"
+  ],
+  "include": [
+   "*/z.ts"
+  ],
+  "exclude": [
+   "**/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/always include literal files with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/always include literal files with jsonSourceFile api.js
new file mode 100644
index 0000000000000..1c730b32eb50a
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/always include literal files with jsonSourceFile api.js	
@@ -0,0 +1,115 @@
+config:
+{
+ "files": [
+  "a.ts"
+ ],
+ "include": [
+  "*/z.ts"
+ ],
+ "exclude": [
+  "**/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "files": [
+   "a.ts"
+  ],
+  "include": [
+   "*/z.ts"
+  ],
+  "exclude": [
+   "**/a.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and empty exclude with json api.js b/tests/baselines/reference/config/matchFiles/and empty exclude with json api.js
new file mode 100644
index 0000000000000..1bee3c7ab69b9
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and empty exclude with json api.js	
@@ -0,0 +1,62 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ],
+ "exclude": []
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "exclude": [],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and empty exclude with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/and empty exclude with jsonSourceFile api.js
new file mode 100644
index 0000000000000..d4ece58b81d9d
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and empty exclude with jsonSourceFile api.js	
@@ -0,0 +1,61 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ],
+ "exclude": []
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "exclude": []
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and exclusions with json api.js b/tests/baselines/reference/config/matchFiles/and exclusions with json api.js
new file mode 100644
index 0000000000000..b32af48d22714
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and exclusions with json api.js	
@@ -0,0 +1,66 @@
+config:
+{
+ "include": [
+  "**/?.ts"
+ ],
+ "exclude": [
+  "a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/b.ts",
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/?.ts"
+  ],
+  "exclude": [
+   "a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and exclusions with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/and exclusions with jsonSourceFile api.js
new file mode 100644
index 0000000000000..2365e1a790356
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and exclusions with jsonSourceFile api.js	
@@ -0,0 +1,65 @@
+config:
+{
+ "include": [
+  "**/?.ts"
+ ],
+ "exclude": [
+  "a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/b.ts",
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/?.ts"
+  ],
+  "exclude": [
+   "a.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and explicit recursive include with json api.js b/tests/baselines/reference/config/matchFiles/and explicit recursive include with json api.js
new file mode 100644
index 0000000000000..1821e59ed2334
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and explicit recursive include with json api.js	
@@ -0,0 +1,63 @@
+config:
+{
+ "include": [
+  "**/a.ts",
+  "**/node_modules/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/node_modules/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts",
+   "**/node_modules/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and explicit recursive include with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/and explicit recursive include with jsonSourceFile api.js
new file mode 100644
index 0000000000000..3f47bed36a925
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and explicit recursive include with jsonSourceFile api.js	
@@ -0,0 +1,62 @@
+config:
+{
+ "include": [
+  "**/a.ts",
+  "**/node_modules/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/node_modules/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts",
+   "**/node_modules/a.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and explicit wildcard include with json api.js b/tests/baselines/reference/config/matchFiles/and explicit wildcard include with json api.js
new file mode 100644
index 0000000000000..83bee1dabe647
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and explicit wildcard include with json api.js	
@@ -0,0 +1,62 @@
+config:
+{
+ "include": [
+  "*/a.ts",
+  "node_modules/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/a.ts",
+  "c:/dev/node_modules/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*/a.ts",
+   "node_modules/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and explicit wildcard include with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/and explicit wildcard include with jsonSourceFile api.js
new file mode 100644
index 0000000000000..421e96679c648
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and explicit wildcard include with jsonSourceFile api.js	
@@ -0,0 +1,61 @@
+config:
+{
+ "include": [
+  "*/a.ts",
+  "node_modules/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/a.ts",
+  "c:/dev/node_modules/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*/a.ts",
+   "node_modules/a.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and no exclusions with json api.js b/tests/baselines/reference/config/matchFiles/and no exclusions with json api.js
new file mode 100644
index 0000000000000..d731b74f840b9
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and no exclusions with json api.js	
@@ -0,0 +1,60 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and no exclusions with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/and no exclusions with jsonSourceFile api.js
new file mode 100644
index 0000000000000..a5462b86bb350
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and no exclusions with jsonSourceFile api.js	
@@ -0,0 +1,59 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and wildcard include with json api.js b/tests/baselines/reference/config/matchFiles/and wildcard include with json api.js
new file mode 100644
index 0000000000000..fe0804dc6a443
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and wildcard include with json api.js	
@@ -0,0 +1,59 @@
+config:
+{
+ "include": [
+  "*/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/and wildcard include with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/and wildcard include with jsonSourceFile api.js
new file mode 100644
index 0000000000000..7e28ff8996145
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/and wildcard include with jsonSourceFile api.js	
@@ -0,0 +1,58 @@
+config:
+{
+ "include": [
+  "*/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*/a.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/are not removed due to excludes with json api.js b/tests/baselines/reference/config/matchFiles/are not removed due to excludes with json api.js
new file mode 100644
index 0000000000000..2b5129a8a20a8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/are not removed due to excludes with json api.js	
@@ -0,0 +1,111 @@
+config:
+{
+ "files": [
+  "a.ts",
+  "b.ts"
+ ],
+ "exclude": [
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "files": [
+   "a.ts",
+   "b.ts"
+  ],
+  "exclude": [
+   "b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/are not removed due to excludes with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/are not removed due to excludes with jsonSourceFile api.js
new file mode 100644
index 0000000000000..db253ef243aa0
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/are not removed due to excludes with jsonSourceFile api.js	
@@ -0,0 +1,110 @@
+config:
+{
+ "files": [
+  "a.ts",
+  "b.ts"
+ ],
+ "exclude": [
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "files": [
+   "a.ts",
+   "b.ts"
+  ],
+  "exclude": [
+   "b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/can exclude dirs whose pattern starts with starstar with json api.js b/tests/baselines/reference/config/matchFiles/can exclude dirs whose pattern starts with starstar with json api.js
new file mode 100644
index 0000000000000..98c1a4543d928
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/can exclude dirs whose pattern starts with starstar with json api.js	
@@ -0,0 +1,97 @@
+config:
+{
+ "exclude": [
+  "**/x"
+ ]
+}
+Fs::
+//// [/dev/A.ts]
+
+
+//// [/dev/B.ts]
+
+
+//// [/dev/a.d.ts]
+
+
+//// [/dev/a.js]
+
+
+//// [/dev/a.ts]
+
+
+//// [/dev/b.js]
+
+
+//// [/dev/b.ts]
+
+
+//// [/dev/c.d.ts]
+
+
+//// [/dev/js/a.js]
+
+
+//// [/dev/js/b.js]
+
+
+//// [/dev/q/a/c/b/d.ts]
+
+
+//// [/dev/x/a.ts]
+
+
+//// [/dev/x/b.ts]
+
+
+//// [/dev/x/y/a.ts]
+
+
+//// [/dev/x/y/b.ts]
+
+
+//// [/dev/z/a.ts]
+
+
+//// [/dev/z/aba.ts]
+
+
+//// [/dev/z/abz.ts]
+
+
+//// [/dev/z/b.ts]
+
+
+//// [/dev/z/bba.ts]
+
+
+//// [/dev/z/bbz.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "exclude": [
+   "**/x"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '["**/x"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/can exclude dirs whose pattern starts with starstar with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/can exclude dirs whose pattern starts with starstar with jsonSourceFile api.js
new file mode 100644
index 0000000000000..c0cc715e61027
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/can exclude dirs whose pattern starts with starstar with jsonSourceFile api.js	
@@ -0,0 +1,96 @@
+config:
+{
+ "exclude": [
+  "**/x"
+ ]
+}
+Fs::
+//// [/dev/A.ts]
+
+
+//// [/dev/B.ts]
+
+
+//// [/dev/a.d.ts]
+
+
+//// [/dev/a.js]
+
+
+//// [/dev/a.ts]
+
+
+//// [/dev/b.js]
+
+
+//// [/dev/b.ts]
+
+
+//// [/dev/c.d.ts]
+
+
+//// [/dev/js/a.js]
+
+
+//// [/dev/js/b.js]
+
+
+//// [/dev/q/a/c/b/d.ts]
+
+
+//// [/dev/x/a.ts]
+
+
+//// [/dev/x/b.ts]
+
+
+//// [/dev/x/y/a.ts]
+
+
+//// [/dev/x/y/b.ts]
+
+
+//// [/dev/z/a.ts]
+
+
+//// [/dev/z/aba.ts]
+
+
+//// [/dev/z/abz.ts]
+
+
+//// [/dev/z/b.ts]
+
+
+//// [/dev/z/bba.ts]
+
+
+//// [/dev/z/bbz.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "exclude": [
+   "**/x"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '["**/x"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/can include dirs whose pattern starts with starstart with json api.js b/tests/baselines/reference/config/matchFiles/can include dirs whose pattern starts with starstart with json api.js
new file mode 100644
index 0000000000000..c0baf78d540e4
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/can include dirs whose pattern starts with starstart with json api.js	
@@ -0,0 +1,99 @@
+config:
+{
+ "include": [
+  "**/x",
+  "**/a/**/b"
+ ]
+}
+Fs::
+//// [/dev/A.ts]
+
+
+//// [/dev/B.ts]
+
+
+//// [/dev/a.d.ts]
+
+
+//// [/dev/a.js]
+
+
+//// [/dev/a.ts]
+
+
+//// [/dev/b.js]
+
+
+//// [/dev/b.ts]
+
+
+//// [/dev/c.d.ts]
+
+
+//// [/dev/js/a.js]
+
+
+//// [/dev/js/b.js]
+
+
+//// [/dev/q/a/c/b/d.ts]
+
+
+//// [/dev/x/a.ts]
+
+
+//// [/dev/x/b.ts]
+
+
+//// [/dev/x/y/a.ts]
+
+
+//// [/dev/x/y/b.ts]
+
+
+//// [/dev/z/a.ts]
+
+
+//// [/dev/z/aba.ts]
+
+
+//// [/dev/z/abz.ts]
+
+
+//// [/dev/z/b.ts]
+
+
+//// [/dev/z/bba.ts]
+
+
+//// [/dev/z/bbz.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/x",
+   "**/a/**/b"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/x","**/a/**/b"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/can include dirs whose pattern starts with starstart with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/can include dirs whose pattern starts with starstart with jsonSourceFile api.js
new file mode 100644
index 0000000000000..16e9270262fc2
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/can include dirs whose pattern starts with starstart with jsonSourceFile api.js	
@@ -0,0 +1,98 @@
+config:
+{
+ "include": [
+  "**/x",
+  "**/a/**/b"
+ ]
+}
+Fs::
+//// [/dev/A.ts]
+
+
+//// [/dev/B.ts]
+
+
+//// [/dev/a.d.ts]
+
+
+//// [/dev/a.js]
+
+
+//// [/dev/a.ts]
+
+
+//// [/dev/b.js]
+
+
+//// [/dev/b.ts]
+
+
+//// [/dev/c.d.ts]
+
+
+//// [/dev/js/a.js]
+
+
+//// [/dev/js/b.js]
+
+
+//// [/dev/q/a/c/b/d.ts]
+
+
+//// [/dev/x/a.ts]
+
+
+//// [/dev/x/b.ts]
+
+
+//// [/dev/x/y/a.ts]
+
+
+//// [/dev/x/y/b.ts]
+
+
+//// [/dev/z/a.ts]
+
+
+//// [/dev/z/aba.ts]
+
+
+//// [/dev/z/abz.ts]
+
+
+//// [/dev/z/b.ts]
+
+
+//// [/dev/z/bba.ts]
+
+
+//// [/dev/z/bbz.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/x",
+   "**/a/**/b"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/x","**/a/**/b"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case insensitive with json api.js b/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case insensitive with json api.js
new file mode 100644
index 0000000000000..7d4e736799427
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case insensitive with json api.js	
@@ -0,0 +1,39 @@
+config:
+{}
+Fs::
+//// [c:/dev/xylophone.ts]
+
+
+//// [c:/dev/Yosemite.ts]
+
+
+//// [c:/dev/zebra.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/Yosemite.ts",
+  "c:/dev/xylophone.ts",
+  "c:/dev/zebra.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case insensitive with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case insensitive with jsonSourceFile api.js
new file mode 100644
index 0000000000000..287a1a916ddfe
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case insensitive with jsonSourceFile api.js	
@@ -0,0 +1,37 @@
+config:
+{}
+Fs::
+//// [c:/dev/xylophone.ts]
+
+
+//// [c:/dev/Yosemite.ts]
+
+
+//// [c:/dev/zebra.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/Yosemite.ts",
+  "c:/dev/xylophone.ts",
+  "c:/dev/zebra.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {},
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case sensitive with json api.js b/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case sensitive with json api.js
new file mode 100644
index 0000000000000..dcdf5cebde4f3
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case sensitive with json api.js	
@@ -0,0 +1,36 @@
+config:
+{}
+Fs::
+//// [/dev/Yosemite.ts]
+
+
+//// [/dev/xylophone.ts]
+
+
+//// [/dev/zebra.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case sensitive with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case sensitive with jsonSourceFile api.js
new file mode 100644
index 0000000000000..dc0755bf6f313
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/can include files in the same order on multiple platforms case sensitive with jsonSourceFile api.js	
@@ -0,0 +1,34 @@
+config:
+{}
+Fs::
+//// [/dev/Yosemite.ts]
+
+
+//// [/dev/xylophone.ts]
+
+
+//// [/dev/zebra.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {},
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/case sensitive with json api.js b/tests/baselines/reference/config/matchFiles/case sensitive with json api.js
new file mode 100644
index 0000000000000..eacd16926c42f
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/case sensitive with json api.js	
@@ -0,0 +1,97 @@
+config:
+{
+ "include": [
+  "**/A.ts"
+ ]
+}
+Fs::
+//// [/dev/A.ts]
+
+
+//// [/dev/B.ts]
+
+
+//// [/dev/a.d.ts]
+
+
+//// [/dev/a.js]
+
+
+//// [/dev/a.ts]
+
+
+//// [/dev/b.js]
+
+
+//// [/dev/b.ts]
+
+
+//// [/dev/c.d.ts]
+
+
+//// [/dev/js/a.js]
+
+
+//// [/dev/js/b.js]
+
+
+//// [/dev/q/a/c/b/d.ts]
+
+
+//// [/dev/x/a.ts]
+
+
+//// [/dev/x/b.ts]
+
+
+//// [/dev/x/y/a.ts]
+
+
+//// [/dev/x/y/b.ts]
+
+
+//// [/dev/z/a.ts]
+
+
+//// [/dev/z/aba.ts]
+
+
+//// [/dev/z/abz.ts]
+
+
+//// [/dev/z/b.ts]
+
+
+//// [/dev/z/bba.ts]
+
+
+//// [/dev/z/bbz.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/A.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/A.ts"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/case sensitive with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/case sensitive with jsonSourceFile api.js
new file mode 100644
index 0000000000000..8354874b16601
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/case sensitive with jsonSourceFile api.js	
@@ -0,0 +1,96 @@
+config:
+{
+ "include": [
+  "**/A.ts"
+ ]
+}
+Fs::
+//// [/dev/A.ts]
+
+
+//// [/dev/B.ts]
+
+
+//// [/dev/a.d.ts]
+
+
+//// [/dev/a.js]
+
+
+//// [/dev/a.ts]
+
+
+//// [/dev/b.js]
+
+
+//// [/dev/b.ts]
+
+
+//// [/dev/c.d.ts]
+
+
+//// [/dev/js/a.js]
+
+
+//// [/dev/js/b.js]
+
+
+//// [/dev/q/a/c/b/d.ts]
+
+
+//// [/dev/x/a.ts]
+
+
+//// [/dev/x/b.ts]
+
+
+//// [/dev/x/y/a.ts]
+
+
+//// [/dev/x/y/b.ts]
+
+
+//// [/dev/z/a.ts]
+
+
+//// [/dev/z/aba.ts]
+
+
+//// [/dev/z/abz.ts]
+
+
+//// [/dev/z/b.ts]
+
+
+//// [/dev/z/bba.ts]
+
+
+//// [/dev/z/bbz.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/A.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/A.ts"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude .js files when allowJs=false with json api.js b/tests/baselines/reference/config/matchFiles/exclude .js files when allowJs=false with json api.js
new file mode 100644
index 0000000000000..8abd00d303d36
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude .js files when allowJs=false with json api.js	
@@ -0,0 +1,110 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": false
+ },
+ "include": [
+  "js/*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": false,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": false
+  },
+  "include": [
+   "js/*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/js": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["js/*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude .js files when allowJs=false with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/exclude .js files when allowJs=false with jsonSourceFile api.js
new file mode 100644
index 0000000000000..8abe45c57bd99
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude .js files when allowJs=false with jsonSourceFile api.js	
@@ -0,0 +1,109 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": false
+ },
+ "include": [
+  "js/*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": false,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": false
+  },
+  "include": [
+   "js/*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/js": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["js/*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude .min.js files using wildcards with json api.js b/tests/baselines/reference/config/matchFiles/exclude .min.js files using wildcards with json api.js
new file mode 100644
index 0000000000000..f2515327be3c7
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude .min.js files using wildcards with json api.js	
@@ -0,0 +1,117 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": true
+ },
+ "include": [
+  "js/*.min.js"
+ ],
+ "exclude": [
+  "js/a*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/js/d.min.js"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": true
+  },
+  "include": [
+   "js/*.min.js"
+  ],
+  "exclude": [
+   "js/a*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/js": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude .min.js files using wildcards with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/exclude .min.js files using wildcards with jsonSourceFile api.js
new file mode 100644
index 0000000000000..f4f481ce27ad9
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude .min.js files using wildcards with jsonSourceFile api.js	
@@ -0,0 +1,116 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": true
+ },
+ "include": [
+  "js/*.min.js"
+ ],
+ "exclude": [
+  "js/a*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/js/d.min.js"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": true
+  },
+  "include": [
+   "js/*.min.js"
+  ],
+  "exclude": [
+   "js/a*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/js": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude files with .. in their name with json api.js b/tests/baselines/reference/config/matchFiles/exclude files with .. in their name with json api.js
new file mode 100644
index 0000000000000..2b8d54e5382f6
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude files with .. in their name with json api.js	
@@ -0,0 +1,110 @@
+config:
+{
+ "include": [
+  "c:/ext/**/*"
+ ],
+ "exclude": [
+  "c:/ext/b/a..b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/ext/ext.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "c:/ext/**/*"
+  ],
+  "exclude": [
+   "c:/ext/b/a..b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/ext": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude files with .. in their name with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/exclude files with .. in their name with jsonSourceFile api.js
new file mode 100644
index 0000000000000..3c749ba5aefb0
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude files with .. in their name with jsonSourceFile api.js	
@@ -0,0 +1,109 @@
+config:
+{
+ "include": [
+  "c:/ext/**/*"
+ ],
+ "exclude": [
+  "c:/ext/b/a..b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/ext/ext.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "c:/ext/**/*"
+  ],
+  "exclude": [
+   "c:/ext/b/a..b.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/ext": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude folders with json api.js b/tests/baselines/reference/config/matchFiles/exclude folders with json api.js
new file mode 100644
index 0000000000000..bfbc9b3dc0007
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude folders with json api.js	
@@ -0,0 +1,114 @@
+config:
+{
+ "include": [
+  "**/*"
+ ],
+ "exclude": [
+  "z",
+  "x"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/c.d.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/*"
+  ],
+  "exclude": [
+   "z",
+   "x"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude folders with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/exclude folders with jsonSourceFile api.js
new file mode 100644
index 0000000000000..2345662ea47f0
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude folders with jsonSourceFile api.js	
@@ -0,0 +1,113 @@
+config:
+{
+ "include": [
+  "**/*"
+ ],
+ "exclude": [
+  "z",
+  "x"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/c.d.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/*"
+  ],
+  "exclude": [
+   "z",
+   "x"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude paths outside of the project using relative paths with json api.js b/tests/baselines/reference/config/matchFiles/exclude paths outside of the project using relative paths with json api.js
new file mode 100644
index 0000000000000..373996f1495a8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude paths outside of the project using relative paths with json api.js	
@@ -0,0 +1,107 @@
+config:
+{
+ "include": [
+  "c:/**/*"
+ ],
+ "exclude": [
+  "../**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "c:/**/*"
+  ],
+  "exclude": [
+   "../**"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["c:/**/*"]' and 'exclude' paths were '["../**"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/exclude paths outside of the project using relative paths with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/exclude paths outside of the project using relative paths with jsonSourceFile api.js
new file mode 100644
index 0000000000000..aacae1a829949
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/exclude paths outside of the project using relative paths with jsonSourceFile api.js	
@@ -0,0 +1,106 @@
+config:
+{
+ "include": [
+  "c:/**/*"
+ ],
+ "exclude": [
+  "../**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "c:/**/*"
+  ],
+  "exclude": [
+   "../**"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["c:/**/*"]' and 'exclude' paths were '["../**"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in excludes after a subdirectory with json api.js b/tests/baselines/reference/config/matchFiles/in excludes after a subdirectory with json api.js
new file mode 100644
index 0000000000000..3792b9bc78c0e
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in excludes after a subdirectory with json api.js	
@@ -0,0 +1,114 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ],
+ "exclude": [
+  "**/y/.."
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/y/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "exclude": [
+   "**/y/.."
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/y/..'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in excludes after a subdirectory with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/in excludes after a subdirectory with jsonSourceFile api.js
new file mode 100644
index 0000000000000..5af1e5230aaf2
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in excludes after a subdirectory with jsonSourceFile api.js	
@@ -0,0 +1,116 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ],
+ "exclude": [
+  "**/y/.."
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/y/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "exclude": [
+   "**/y/.."
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+tsconfig.json:6:3 - error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/y/..'.
+
+6   "**/y/.."
+    ~~~~~~~~~
+
diff --git a/tests/baselines/reference/config/matchFiles/in excludes immediately after with json api.js b/tests/baselines/reference/config/matchFiles/in excludes immediately after with json api.js
new file mode 100644
index 0000000000000..eb4c641aef2d7
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in excludes immediately after with json api.js	
@@ -0,0 +1,114 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ],
+ "exclude": [
+  "**/.."
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/y/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "exclude": [
+   "**/.."
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/..'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in excludes immediately after with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/in excludes immediately after with jsonSourceFile api.js
new file mode 100644
index 0000000000000..d0e3d6356e48d
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in excludes immediately after with jsonSourceFile api.js	
@@ -0,0 +1,116 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ],
+ "exclude": [
+  "**/.."
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/y/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "exclude": [
+   "**/.."
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+tsconfig.json:6:3 - error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/..'.
+
+6   "**/.."
+    ~~~~~~~
+
diff --git a/tests/baselines/reference/config/matchFiles/in excludes with json api.js b/tests/baselines/reference/config/matchFiles/in excludes with json api.js
new file mode 100644
index 0000000000000..fdea974132a97
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in excludes with json api.js	
@@ -0,0 +1,111 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ],
+ "exclude": [
+  "**/x/**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "exclude": [
+   "**/x/**"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/in excludes with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/in excludes with jsonSourceFile api.js
new file mode 100644
index 0000000000000..2c35e4f366bb7
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in excludes with jsonSourceFile api.js	
@@ -0,0 +1,110 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ],
+ "exclude": [
+  "**/x/**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "exclude": [
+   "**/x/**"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/in excludes with trailing recursive directory with json api.js b/tests/baselines/reference/config/matchFiles/in excludes with trailing recursive directory with json api.js
new file mode 100644
index 0000000000000..989b631a68ffc
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in excludes with trailing recursive directory with json api.js	
@@ -0,0 +1,107 @@
+config:
+{
+ "include": [
+  "**/*"
+ ],
+ "exclude": [
+  "**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/*"
+  ],
+  "exclude": [
+   "**"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '["**"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in excludes with trailing recursive directory with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/in excludes with trailing recursive directory with jsonSourceFile api.js
new file mode 100644
index 0000000000000..06b77203f5236
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in excludes with trailing recursive directory with jsonSourceFile api.js	
@@ -0,0 +1,106 @@
+config:
+{
+ "include": [
+  "**/*"
+ ],
+ "exclude": [
+  "**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/*"
+  ],
+  "exclude": [
+   "**"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '["**"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in includes after a subdirectory with json api.js b/tests/baselines/reference/config/matchFiles/in includes after a subdirectory with json api.js
new file mode 100644
index 0000000000000..85c93a0b484d1
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in includes after a subdirectory with json api.js	
@@ -0,0 +1,102 @@
+config:
+{
+ "include": [
+  "**/y/../*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/y/../*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/y/../*'.
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/y/../*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in includes after a subdirectory with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/in includes after a subdirectory with jsonSourceFile api.js
new file mode 100644
index 0000000000000..b6cd1c33ddcef
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in includes after a subdirectory with jsonSourceFile api.js	
@@ -0,0 +1,104 @@
+config:
+{
+ "include": [
+  "**/y/../*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/y/../*"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+tsconfig.json:3:3 - error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/y/../*'.
+
+3   "**/y/../*"
+    ~~~~~~~~~~~
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/y/../*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in includes immediately after with json api.js b/tests/baselines/reference/config/matchFiles/in includes immediately after with json api.js
new file mode 100644
index 0000000000000..ae93f65c99c06
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in includes immediately after with json api.js	
@@ -0,0 +1,102 @@
+config:
+{
+ "include": [
+  "**/../*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/../*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/../*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in includes immediately after with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/in includes immediately after with jsonSourceFile api.js
new file mode 100644
index 0000000000000..c073e84ce2d9d
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in includes immediately after with jsonSourceFile api.js	
@@ -0,0 +1,104 @@
+config:
+{
+ "include": [
+  "**/../*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/../*"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+tsconfig.json:3:3 - error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+
+3   "**/../*"
+    ~~~~~~~~~
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/../*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in includes with multiple recursive directory patterns with json api.js b/tests/baselines/reference/config/matchFiles/in includes with multiple recursive directory patterns with json api.js
new file mode 100644
index 0000000000000..cf4673cab1b35
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in includes with multiple recursive directory patterns with json api.js	
@@ -0,0 +1,108 @@
+config:
+{
+ "include": [
+  "**/x/**/*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/a.ts",
+  "c:/dev/x/aa.ts",
+  "c:/dev/x/b.ts",
+  "c:/dev/x/y/a.ts",
+  "c:/dev/x/y/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/x/**/*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/in includes with multiple recursive directory patterns with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/in includes with multiple recursive directory patterns with jsonSourceFile api.js
new file mode 100644
index 0000000000000..0ee0690bf7ef2
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in includes with multiple recursive directory patterns with jsonSourceFile api.js	
@@ -0,0 +1,107 @@
+config:
+{
+ "include": [
+  "**/x/**/*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/a.ts",
+  "c:/dev/x/aa.ts",
+  "c:/dev/x/b.ts",
+  "c:/dev/x/y/a.ts",
+  "c:/dev/x/y/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/x/**/*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/in includes with trailing recursive directory with json api.js b/tests/baselines/reference/config/matchFiles/in includes with trailing recursive directory with json api.js
new file mode 100644
index 0000000000000..2df0a02448bd8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in includes with trailing recursive directory with json api.js	
@@ -0,0 +1,102 @@
+config:
+{
+ "include": [
+  "**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS5010: File specification cannot end in a recursive directory wildcard ('**'): '**'.
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/in includes with trailing recursive directory with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/in includes with trailing recursive directory with jsonSourceFile api.js
new file mode 100644
index 0000000000000..59e50c45b495d
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/in includes with trailing recursive directory with jsonSourceFile api.js	
@@ -0,0 +1,104 @@
+config:
+{
+ "include": [
+  "**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+tsconfig.json:3:3 - error TS5010: File specification cannot end in a recursive directory wildcard ('**'): '**'.
+
+3   "**"
+    ~~~~
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/include .js files when allowJs=true with json api.js b/tests/baselines/reference/config/matchFiles/include .js files when allowJs=true with json api.js
new file mode 100644
index 0000000000000..e659849dc28b9
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include .js files when allowJs=true with json api.js	
@@ -0,0 +1,112 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": true
+ },
+ "include": [
+  "js/*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/js/a.js",
+  "c:/dev/js/b.js"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": true
+  },
+  "include": [
+   "js/*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/js": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include .js files when allowJs=true with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/include .js files when allowJs=true with jsonSourceFile api.js
new file mode 100644
index 0000000000000..c64b0de13e8a8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include .js files when allowJs=true with jsonSourceFile api.js	
@@ -0,0 +1,111 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": true
+ },
+ "include": [
+  "js/*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/js/a.js",
+  "c:/dev/js/b.js"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": true
+  },
+  "include": [
+   "js/*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/js": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include explicitly listed .min.js files when allowJs=true with json api.js b/tests/baselines/reference/config/matchFiles/include explicitly listed .min.js files when allowJs=true with json api.js
new file mode 100644
index 0000000000000..245e50e95e7cf
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include explicitly listed .min.js files when allowJs=true with json api.js	
@@ -0,0 +1,112 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": true
+ },
+ "include": [
+  "js/*.min.js"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/js/ab.min.js",
+  "c:/dev/js/d.min.js"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": true
+  },
+  "include": [
+   "js/*.min.js"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/js": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include explicitly listed .min.js files when allowJs=true with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/include explicitly listed .min.js files when allowJs=true with jsonSourceFile api.js
new file mode 100644
index 0000000000000..988d5a28c32a4
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include explicitly listed .min.js files when allowJs=true with jsonSourceFile api.js	
@@ -0,0 +1,111 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": true
+ },
+ "include": [
+  "js/*.min.js"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/js/ab.min.js",
+  "c:/dev/js/d.min.js"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": true
+  },
+  "include": [
+   "js/*.min.js"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/js": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include files with .. in their name with json api.js b/tests/baselines/reference/config/matchFiles/include files with .. in their name with json api.js
new file mode 100644
index 0000000000000..f1131049a0674
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include files with .. in their name with json api.js	
@@ -0,0 +1,108 @@
+config:
+{
+ "include": [
+  "c:/ext/b/a..b.ts"
+ ],
+ "exclude": [
+  "**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/ext/b/a..b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "c:/ext/b/a..b.ts"
+  ],
+  "exclude": [
+   "**"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include files with .. in their name with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/include files with .. in their name with jsonSourceFile api.js
new file mode 100644
index 0000000000000..6230b48f3edee
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include files with .. in their name with jsonSourceFile api.js	
@@ -0,0 +1,107 @@
+config:
+{
+ "include": [
+  "c:/ext/b/a..b.ts"
+ ],
+ "exclude": [
+  "**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/ext/b/a..b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "c:/ext/b/a..b.ts"
+  ],
+  "exclude": [
+   "**"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include paths outside of the project using relative paths with json api.js b/tests/baselines/reference/config/matchFiles/include paths outside of the project using relative paths with json api.js
new file mode 100644
index 0000000000000..0cff994f910a0
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include paths outside of the project using relative paths with json api.js	
@@ -0,0 +1,112 @@
+config:
+{
+ "include": [
+  "*",
+  "../ext/*"
+ ],
+ "exclude": [
+  "**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/ext/ext.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*",
+   "../ext/*"
+  ],
+  "exclude": [
+   "**"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/ext": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include paths outside of the project using relative paths with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/include paths outside of the project using relative paths with jsonSourceFile api.js
new file mode 100644
index 0000000000000..35e261c5b2ecb
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include paths outside of the project using relative paths with jsonSourceFile api.js	
@@ -0,0 +1,111 @@
+config:
+{
+ "include": [
+  "*",
+  "../ext/*"
+ ],
+ "exclude": [
+  "**"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/ext/ext.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*",
+   "../ext/*"
+  ],
+  "exclude": [
+   "**"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/ext": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include paths outside of the project with json api.js b/tests/baselines/reference/config/matchFiles/include paths outside of the project with json api.js
new file mode 100644
index 0000000000000..168a943a715c3
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include paths outside of the project with json api.js	
@@ -0,0 +1,110 @@
+config:
+{
+ "include": [
+  "*",
+  "c:/ext/*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/c.d.ts",
+  "c:/ext/ext.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*",
+   "c:/ext/*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.None",
+  "c:/ext": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/include paths outside of the project with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/include paths outside of the project with jsonSourceFile api.js
new file mode 100644
index 0000000000000..9b5fc7cb68a7f
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/include paths outside of the project with jsonSourceFile api.js	
@@ -0,0 +1,109 @@
+config:
+{
+ "include": [
+  "*",
+  "c:/ext/*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/c.d.ts",
+  "c:/ext/ext.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*",
+   "c:/ext/*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.None",
+  "c:/ext": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/is sorted in include order, then in alphabetical order with json api.js b/tests/baselines/reference/config/matchFiles/is sorted in include order, then in alphabetical order with json api.js
new file mode 100644
index 0000000000000..754659c963358
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/is sorted in include order, then in alphabetical order with json api.js	
@@ -0,0 +1,115 @@
+config:
+{
+ "include": [
+  "z/*.ts",
+  "x/*.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/z/a.ts",
+  "c:/dev/z/aba.ts",
+  "c:/dev/z/abz.ts",
+  "c:/dev/z/b.ts",
+  "c:/dev/z/bba.ts",
+  "c:/dev/z/bbz.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/aa.ts",
+  "c:/dev/x/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "z/*.ts",
+   "x/*.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/z": "WatchDirectoryFlags.None",
+  "c:/dev/x": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/is sorted in include order, then in alphabetical order with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/is sorted in include order, then in alphabetical order with jsonSourceFile api.js
new file mode 100644
index 0000000000000..4961455ad98a7
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/is sorted in include order, then in alphabetical order with jsonSourceFile api.js	
@@ -0,0 +1,114 @@
+config:
+{
+ "include": [
+  "z/*.ts",
+  "x/*.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/z/a.ts",
+  "c:/dev/z/aba.ts",
+  "c:/dev/z/abz.ts",
+  "c:/dev/z/b.ts",
+  "c:/dev/z/bba.ts",
+  "c:/dev/z/bbz.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/aa.ts",
+  "c:/dev/x/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "z/*.ts",
+   "x/*.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/z": "WatchDirectoryFlags.None",
+  "c:/dev/x": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/missing files are still present with json api.js b/tests/baselines/reference/config/matchFiles/missing files are still present with json api.js
new file mode 100644
index 0000000000000..0e856bcc8dd10
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/missing files are still present with json api.js	
@@ -0,0 +1,105 @@
+config:
+{
+ "files": [
+  "z.ts",
+  "x.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/z.ts",
+  "c:/dev/x.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "files": [
+   "z.ts",
+   "x.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/missing files are still present with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/missing files are still present with jsonSourceFile api.js
new file mode 100644
index 0000000000000..0a8f3b90d49cf
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/missing files are still present with jsonSourceFile api.js	
@@ -0,0 +1,104 @@
+config:
+{
+ "files": [
+  "z.ts",
+  "x.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/z.ts",
+  "c:/dev/x.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "files": [
+   "z.ts",
+   "x.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/question matches only a single character with json api.js b/tests/baselines/reference/config/matchFiles/question matches only a single character with json api.js
new file mode 100644
index 0000000000000..ad59392038443
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/question matches only a single character with json api.js	
@@ -0,0 +1,105 @@
+config:
+{
+ "include": [
+  "x/?.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/a.ts",
+  "c:/dev/x/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/?.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/x": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/question matches only a single character with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/question matches only a single character with jsonSourceFile api.js
new file mode 100644
index 0000000000000..19959f4698ac8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/question matches only a single character with jsonSourceFile api.js	
@@ -0,0 +1,104 @@
+config:
+{
+ "include": [
+  "x/?.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/a.ts",
+  "c:/dev/x/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/?.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/x": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/same named declarations are excluded with json api.js b/tests/baselines/reference/config/matchFiles/same named declarations are excluded with json api.js
new file mode 100644
index 0000000000000..91fcf3fc66875
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/same named declarations are excluded with json api.js	
@@ -0,0 +1,106 @@
+config:
+{
+ "include": [
+  "*.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/c.d.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/same named declarations are excluded with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/same named declarations are excluded with jsonSourceFile api.js
new file mode 100644
index 0000000000000..d0a89f98e4480
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/same named declarations are excluded with jsonSourceFile api.js	
@@ -0,0 +1,105 @@
+config:
+{
+ "include": [
+  "*.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/c.d.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/star matches only ts files with json api.js b/tests/baselines/reference/config/matchFiles/star matches only ts files with json api.js
new file mode 100644
index 0000000000000..45e0d5ba4966e
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/star matches only ts files with json api.js	
@@ -0,0 +1,106 @@
+config:
+{
+ "include": [
+  "*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/c.d.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/star matches only ts files with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/star matches only ts files with jsonSourceFile api.js
new file mode 100644
index 0000000000000..ce3a1bd8a0fbc
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/star matches only ts files with jsonSourceFile api.js	
@@ -0,0 +1,105 @@
+config:
+{
+ "include": [
+  "*"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/c.d.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.None"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/that are not explicitly included with json api.js b/tests/baselines/reference/config/matchFiles/that are not explicitly included with json api.js
new file mode 100644
index 0000000000000..c3f5e3710bd9a
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/that are not explicitly included with json api.js	
@@ -0,0 +1,63 @@
+config:
+{
+ "include": [
+  "x/**/*",
+  "w/*/*"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/d.ts",
+  "c:/dev/x/y/d.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/**/*",
+   "w/*/*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/x": "WatchDirectoryFlags.Recursive",
+  "c:/dev/w": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/that are not explicitly included with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/that are not explicitly included with jsonSourceFile api.js
new file mode 100644
index 0000000000000..0f817bc7e4599
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/that are not explicitly included with jsonSourceFile api.js	
@@ -0,0 +1,62 @@
+config:
+{
+ "include": [
+  "x/**/*",
+  "w/*/*"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/d.ts",
+  "c:/dev/x/y/d.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/**/*",
+   "w/*/*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/x": "WatchDirectoryFlags.Recursive",
+  "c:/dev/w": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/when recursive symlinked directories are present with json api.js b/tests/baselines/reference/config/matchFiles/when recursive symlinked directories are present with json api.js
new file mode 100644
index 0000000000000..20c4978089449
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/when recursive symlinked directories are present with json api.js	
@@ -0,0 +1,34 @@
+config:
+{}
+Fs::
+//// [c:/dev/a/b/c/grandparent] symlink(c:/dev/a)
+//// [c:/dev/a/b/parent] symlink(c:/dev/a)
+//// [c:/dev/a/self] symlink(c:/dev/A)
+//// [c:/dev/index.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/index.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/when recursive symlinked directories are present with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/when recursive symlinked directories are present with jsonSourceFile api.js
new file mode 100644
index 0000000000000..f8fea8e6e3e86
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/when recursive symlinked directories are present with jsonSourceFile api.js	
@@ -0,0 +1,32 @@
+config:
+{}
+Fs::
+//// [c:/dev/a/b/c/grandparent] symlink(c:/dev/a)
+//// [c:/dev/a/b/parent] symlink(c:/dev/a)
+//// [c:/dev/a/self] symlink(c:/dev/A)
+//// [c:/dev/index.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/index.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {},
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with case sensitive exclude with json api.js b/tests/baselines/reference/config/matchFiles/with case sensitive exclude with json api.js
new file mode 100644
index 0000000000000..893aa2d70bb11
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with case sensitive exclude with json api.js	
@@ -0,0 +1,101 @@
+config:
+{
+ "include": [
+  "B.ts"
+ ],
+ "exclude": [
+  "**/b.ts"
+ ]
+}
+Fs::
+//// [/dev/A.ts]
+
+
+//// [/dev/B.ts]
+
+
+//// [/dev/a.d.ts]
+
+
+//// [/dev/a.js]
+
+
+//// [/dev/a.ts]
+
+
+//// [/dev/b.js]
+
+
+//// [/dev/b.ts]
+
+
+//// [/dev/c.d.ts]
+
+
+//// [/dev/js/a.js]
+
+
+//// [/dev/js/b.js]
+
+
+//// [/dev/q/a/c/b/d.ts]
+
+
+//// [/dev/x/a.ts]
+
+
+//// [/dev/x/b.ts]
+
+
+//// [/dev/x/y/a.ts]
+
+
+//// [/dev/x/y/b.ts]
+
+
+//// [/dev/z/a.ts]
+
+
+//// [/dev/z/aba.ts]
+
+
+//// [/dev/z/abz.ts]
+
+
+//// [/dev/z/b.ts]
+
+
+//// [/dev/z/bba.ts]
+
+
+//// [/dev/z/bbz.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "B.ts"
+  ],
+  "exclude": [
+   "**/b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["B.ts"]' and 'exclude' paths were '["**/b.ts"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with case sensitive exclude with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with case sensitive exclude with jsonSourceFile api.js
new file mode 100644
index 0000000000000..e7b11727e4aad
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with case sensitive exclude with jsonSourceFile api.js	
@@ -0,0 +1,100 @@
+config:
+{
+ "include": [
+  "B.ts"
+ ],
+ "exclude": [
+  "**/b.ts"
+ ]
+}
+Fs::
+//// [/dev/A.ts]
+
+
+//// [/dev/B.ts]
+
+
+//// [/dev/a.d.ts]
+
+
+//// [/dev/a.js]
+
+
+//// [/dev/a.ts]
+
+
+//// [/dev/b.js]
+
+
+//// [/dev/b.ts]
+
+
+//// [/dev/c.d.ts]
+
+
+//// [/dev/js/a.js]
+
+
+//// [/dev/js/b.js]
+
+
+//// [/dev/q/a/c/b/d.ts]
+
+
+//// [/dev/x/a.ts]
+
+
+//// [/dev/x/b.ts]
+
+
+//// [/dev/x/y/a.ts]
+
+
+//// [/dev/x/y/b.ts]
+
+
+//// [/dev/z/a.ts]
+
+
+//// [/dev/z/aba.ts]
+
+
+//// [/dev/z/abz.ts]
+
+
+//// [/dev/z/b.ts]
+
+
+//// [/dev/z/bba.ts]
+
+
+//// [/dev/z/bbz.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "B.ts"
+  ],
+  "exclude": [
+   "**/b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["B.ts"]' and 'exclude' paths were '["**/b.ts"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with common package folders and empty exclude with json api.js b/tests/baselines/reference/config/matchFiles/with common package folders and empty exclude with json api.js
new file mode 100644
index 0000000000000..2f4f9bda3d342
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with common package folders and empty exclude with json api.js	
@@ -0,0 +1,69 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "node_modules/a.ts",
+  "bower_components/a.ts",
+  "jspm_packages/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/node_modules/a.ts",
+  "c:/dev/bower_components/a.ts",
+  "c:/dev/jspm_packages/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "node_modules/a.ts",
+   "bower_components/a.ts",
+   "jspm_packages/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with common package folders and empty exclude with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with common package folders and empty exclude with jsonSourceFile api.js
new file mode 100644
index 0000000000000..544280641d1e8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with common package folders and empty exclude with jsonSourceFile api.js	
@@ -0,0 +1,68 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "node_modules/a.ts",
+  "bower_components/a.ts",
+  "jspm_packages/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/node_modules/a.ts",
+  "c:/dev/bower_components/a.ts",
+  "c:/dev/jspm_packages/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "node_modules/a.ts",
+   "bower_components/a.ts",
+   "jspm_packages/a.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with common package folders and exclusions with json api.js b/tests/baselines/reference/config/matchFiles/with common package folders and exclusions with json api.js
new file mode 100644
index 0000000000000..be9925b06f450
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with common package folders and exclusions with json api.js	
@@ -0,0 +1,75 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "node_modules/a.ts",
+  "bower_components/a.ts",
+  "jspm_packages/a.ts"
+ ],
+ "exclude": [
+  "a.ts",
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/node_modules/a.ts",
+  "c:/dev/bower_components/a.ts",
+  "c:/dev/jspm_packages/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "node_modules/a.ts",
+   "bower_components/a.ts",
+   "jspm_packages/a.ts"
+  ],
+  "exclude": [
+   "a.ts",
+   "b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with common package folders and exclusions with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with common package folders and exclusions with jsonSourceFile api.js
new file mode 100644
index 0000000000000..b01acd4b9f94e
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with common package folders and exclusions with jsonSourceFile api.js	
@@ -0,0 +1,74 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "node_modules/a.ts",
+  "bower_components/a.ts",
+  "jspm_packages/a.ts"
+ ],
+ "exclude": [
+  "a.ts",
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/node_modules/a.ts",
+  "c:/dev/bower_components/a.ts",
+  "c:/dev/jspm_packages/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "node_modules/a.ts",
+   "bower_components/a.ts",
+   "jspm_packages/a.ts"
+  ],
+  "exclude": [
+   "a.ts",
+   "b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with common package folders and no exclusions with json api.js b/tests/baselines/reference/config/matchFiles/with common package folders and no exclusions with json api.js
new file mode 100644
index 0000000000000..2f4f9bda3d342
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with common package folders and no exclusions with json api.js	
@@ -0,0 +1,69 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "node_modules/a.ts",
+  "bower_components/a.ts",
+  "jspm_packages/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/node_modules/a.ts",
+  "c:/dev/bower_components/a.ts",
+  "c:/dev/jspm_packages/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "node_modules/a.ts",
+   "bower_components/a.ts",
+   "jspm_packages/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with common package folders and no exclusions with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with common package folders and no exclusions with jsonSourceFile api.js
new file mode 100644
index 0000000000000..544280641d1e8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with common package folders and no exclusions with jsonSourceFile api.js	
@@ -0,0 +1,68 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "node_modules/a.ts",
+  "bower_components/a.ts",
+  "jspm_packages/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/node_modules/a.ts",
+  "c:/dev/bower_components/a.ts",
+  "c:/dev/jspm_packages/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "node_modules/a.ts",
+   "bower_components/a.ts",
+   "jspm_packages/a.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with defaults with json api.js b/tests/baselines/reference/config/matchFiles/with defaults with json api.js
new file mode 100644
index 0000000000000..a91a4e7b5a2cb
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with defaults with json api.js	
@@ -0,0 +1,54 @@
+config:
+{}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with defaults with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with defaults with jsonSourceFile api.js
new file mode 100644
index 0000000000000..f4101c99717af
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with defaults with jsonSourceFile api.js	
@@ -0,0 +1,52 @@
+config:
+{}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/bower_components/a.ts]
+
+
+//// [c:/dev/jspm_packages/a.ts]
+
+
+//// [c:/dev/node_modules/a.ts]
+
+
+//// [c:/dev/x/a.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts",
+  "c:/dev/x/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {},
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=false with json api.js b/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=false with json api.js
new file mode 100644
index 0000000000000..ff009e69f0cf0
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=false with json api.js	
@@ -0,0 +1,71 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": false
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": false,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": false
+  },
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=false with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=false with jsonSourceFile api.js
new file mode 100644
index 0000000000000..9ffe78421310a
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=false with jsonSourceFile api.js	
@@ -0,0 +1,70 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": false
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": false,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": false
+  }
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=true with json api.js b/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=true with json api.js
new file mode 100644
index 0000000000000..fbcef69799d9e
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=true with json api.js	
@@ -0,0 +1,73 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": true
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx",
+  "c:/dev/d.js",
+  "c:/dev/e.jsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": true
+  },
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=true with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=true with jsonSourceFile api.js
new file mode 100644
index 0000000000000..fab75bbcc11db
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=none, allowJs=true with jsonSourceFile api.js	
@@ -0,0 +1,72 @@
+config:
+{
+ "compilerOptions": {
+  "allowJs": true
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx",
+  "c:/dev/d.js",
+  "c:/dev/e.jsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "allowJs": true
+  }
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=false with json api.js b/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=false with json api.js
new file mode 100644
index 0000000000000..d9ec43f454afb
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=false with json api.js	
@@ -0,0 +1,74 @@
+config:
+{
+ "compilerOptions": {
+  "jsx": "preserve",
+  "allowJs": false
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "jsx": 1,
+  "allowJs": false,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "jsx": "preserve",
+   "allowJs": false
+  },
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=false with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=false with jsonSourceFile api.js
new file mode 100644
index 0000000000000..a5d7cb2bd44cb
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=false with jsonSourceFile api.js	
@@ -0,0 +1,73 @@
+config:
+{
+ "compilerOptions": {
+  "jsx": "preserve",
+  "allowJs": false
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "jsx": 1,
+  "allowJs": false,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "jsx": "preserve",
+   "allowJs": false
+  }
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=true with json api.js b/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=true with json api.js
new file mode 100644
index 0000000000000..99c17534127e6
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=true with json api.js	
@@ -0,0 +1,76 @@
+config:
+{
+ "compilerOptions": {
+  "jsx": "preserve",
+  "allowJs": true
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "jsx": 1,
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx",
+  "c:/dev/d.js",
+  "c:/dev/e.jsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "jsx": "preserve",
+   "allowJs": true
+  },
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=true with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=true with jsonSourceFile api.js
new file mode 100644
index 0000000000000..ecd1e44fde157
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=preserve, allowJs=true with jsonSourceFile api.js	
@@ -0,0 +1,75 @@
+config:
+{
+ "compilerOptions": {
+  "jsx": "preserve",
+  "allowJs": true
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "jsx": 1,
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx",
+  "c:/dev/d.js",
+  "c:/dev/e.jsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "jsx": "preserve",
+   "allowJs": true
+  }
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=false with json api.js b/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=false with json api.js
new file mode 100644
index 0000000000000..e74950607a648
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=false with json api.js	
@@ -0,0 +1,74 @@
+config:
+{
+ "compilerOptions": {
+  "jsx": "react-native",
+  "allowJs": false
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "jsx": 3,
+  "allowJs": false,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "jsx": "react-native",
+   "allowJs": false
+  },
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=false with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=false with jsonSourceFile api.js
new file mode 100644
index 0000000000000..8148573f9ef46
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=false with jsonSourceFile api.js	
@@ -0,0 +1,73 @@
+config:
+{
+ "compilerOptions": {
+  "jsx": "react-native",
+  "allowJs": false
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "jsx": 3,
+  "allowJs": false,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "jsx": "react-native",
+   "allowJs": false
+  }
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=true with json api.js b/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=true with json api.js
new file mode 100644
index 0000000000000..46acb795c5096
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=true with json api.js	
@@ -0,0 +1,76 @@
+config:
+{
+ "compilerOptions": {
+  "jsx": "react-native",
+  "allowJs": true
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "jsx": 3,
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx",
+  "c:/dev/d.js",
+  "c:/dev/e.jsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "jsx": "react-native",
+   "allowJs": true
+  },
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=true with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=true with jsonSourceFile api.js
new file mode 100644
index 0000000000000..c53d583a5e7bc
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with jsx=react-native, allowJs=true with jsonSourceFile api.js	
@@ -0,0 +1,75 @@
+config:
+{
+ "compilerOptions": {
+  "jsx": "react-native",
+  "allowJs": true
+ }
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.d.ts]
+
+
+//// [c:/dev/b.jsx]
+
+
+//// [c:/dev/b.tsx]
+
+
+//// [c:/dev/c.js]
+
+
+//// [c:/dev/c.tsx]
+
+
+//// [c:/dev/d.js]
+
+
+//// [c:/dev/e.jsx]
+
+
+//// [c:/dev/f.other]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "jsx": 3,
+  "allowJs": true,
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.tsx",
+  "c:/dev/c.tsx",
+  "c:/dev/d.js",
+  "c:/dev/e.jsx"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "compilerOptions": {
+   "jsx": "react-native",
+   "allowJs": true
+  }
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with literal excludes with json api.js b/tests/baselines/reference/config/matchFiles/with literal excludes with json api.js
new file mode 100644
index 0000000000000..5440c5aa65cf7
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with literal excludes with json api.js	
@@ -0,0 +1,110 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts"
+ ],
+ "exclude": [
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts"
+  ],
+  "exclude": [
+   "b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with literal excludes with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with literal excludes with jsonSourceFile api.js
new file mode 100644
index 0000000000000..5c8401da57e47
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with literal excludes with jsonSourceFile api.js	
@@ -0,0 +1,109 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts"
+ ],
+ "exclude": [
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts"
+  ],
+  "exclude": [
+   "b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with missing files are excluded with literal include list with json api.js b/tests/baselines/reference/config/matchFiles/with missing files are excluded with literal include list with json api.js
new file mode 100644
index 0000000000000..b067af459a636
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with missing files are excluded with literal include list with json api.js	
@@ -0,0 +1,103 @@
+config:
+{
+ "include": [
+  "z.ts",
+  "x.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "z.ts",
+   "x.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["z.ts","x.ts"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with missing files are excluded with literal include list with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with missing files are excluded with literal include list with jsonSourceFile api.js
new file mode 100644
index 0000000000000..f534765db3fb8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with missing files are excluded with literal include list with jsonSourceFile api.js	
@@ -0,0 +1,102 @@
+config:
+{
+ "include": [
+  "z.ts",
+  "x.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "z.ts",
+   "x.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["z.ts","x.ts"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with missing files are excluded with wildcard include list with json api.js b/tests/baselines/reference/config/matchFiles/with missing files are excluded with wildcard include list with json api.js
new file mode 100644
index 0000000000000..bbf8b64c14ffc
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with missing files are excluded with wildcard include list with json api.js	
@@ -0,0 +1,103 @@
+config:
+{
+ "include": [
+  "*/z.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*/z.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["*/z.ts"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with missing files are excluded with wildcard include list with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with missing files are excluded with wildcard include list with jsonSourceFile api.js
new file mode 100644
index 0000000000000..3396b3630e0f1
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with missing files are excluded with wildcard include list with jsonSourceFile api.js	
@@ -0,0 +1,102 @@
+config:
+{
+ "include": [
+  "*/z.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "*/z.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["*/z.ts"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with multiple recursive directories with json api.js b/tests/baselines/reference/config/matchFiles/with multiple recursive directories with json api.js
new file mode 100644
index 0000000000000..7c863e1c544fe
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with multiple recursive directories with json api.js	
@@ -0,0 +1,111 @@
+config:
+{
+ "include": [
+  "x/y/**/a.ts",
+  "x/**/a.ts",
+  "z/**/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/y/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/y/**/a.ts",
+   "x/**/a.ts",
+   "z/**/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/x": "WatchDirectoryFlags.Recursive",
+  "c:/dev/z": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with multiple recursive directories with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with multiple recursive directories with jsonSourceFile api.js
new file mode 100644
index 0000000000000..0f79bd9898329
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with multiple recursive directories with jsonSourceFile api.js	
@@ -0,0 +1,110 @@
+config:
+{
+ "include": [
+  "x/y/**/a.ts",
+  "x/**/a.ts",
+  "z/**/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/y/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/y/**/a.ts",
+   "x/**/a.ts",
+   "z/**/a.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/x": "WatchDirectoryFlags.Recursive",
+  "c:/dev/z": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with non .ts file extensions are excluded with json api.js b/tests/baselines/reference/config/matchFiles/with non .ts file extensions are excluded with json api.js
new file mode 100644
index 0000000000000..0f84295e12d11
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with non .ts file extensions are excluded with json api.js	
@@ -0,0 +1,103 @@
+config:
+{
+ "include": [
+  "a.js",
+  "b.js"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.js",
+   "b.js"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["a.js","b.js"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with non .ts file extensions are excluded with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with non .ts file extensions are excluded with jsonSourceFile api.js
new file mode 100644
index 0000000000000..18c0e0efa9abd
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with non .ts file extensions are excluded with jsonSourceFile api.js	
@@ -0,0 +1,102 @@
+config:
+{
+ "include": [
+  "a.js",
+  "b.js"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.js",
+   "b.js"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["a.js","b.js"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with recursive directory with json api.js b/tests/baselines/reference/config/matchFiles/with recursive directory with json api.js
new file mode 100644
index 0000000000000..db2d570e6cea5
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with recursive directory with json api.js	
@@ -0,0 +1,107 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/y/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with recursive directory with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with recursive directory with jsonSourceFile api.js
new file mode 100644
index 0000000000000..d2aedb139a5e8
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with recursive directory with jsonSourceFile api.js	
@@ -0,0 +1,106 @@
+config:
+{
+ "include": [
+  "**/a.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/y/a.ts",
+  "c:/dev/z/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/a.ts"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with recursive excludes with json api.js b/tests/baselines/reference/config/matchFiles/with recursive excludes with json api.js
new file mode 100644
index 0000000000000..fe44fe8130794
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with recursive excludes with json api.js	
@@ -0,0 +1,120 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "x/a.ts",
+  "x/b.ts",
+  "x/y/a.ts",
+  "x/y/b.ts"
+ ],
+ "exclude": [
+  "**/b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/y/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "x/a.ts",
+   "x/b.ts",
+   "x/y/a.ts",
+   "x/y/b.ts"
+  ],
+  "exclude": [
+   "**/b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with recursive excludes with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with recursive excludes with jsonSourceFile api.js
new file mode 100644
index 0000000000000..ba00ddf5f9f34
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with recursive excludes with jsonSourceFile api.js	
@@ -0,0 +1,119 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "x/a.ts",
+  "x/b.ts",
+  "x/y/a.ts",
+  "x/y/b.ts"
+ ],
+ "exclude": [
+  "**/b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/x/a.ts",
+  "c:/dev/x/y/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "x/a.ts",
+   "x/b.ts",
+   "x/y/a.ts",
+   "x/y/b.ts"
+  ],
+  "exclude": [
+   "**/b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with recursive wildcards that match directories with json api.js b/tests/baselines/reference/config/matchFiles/with recursive wildcards that match directories with json api.js
new file mode 100644
index 0000000000000..bc489887e96fb
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with recursive wildcards that match directories with json api.js	
@@ -0,0 +1,62 @@
+config:
+{
+ "include": [
+  "**/.*/*"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/.z/c.ts",
+  "c:/dev/g.min.js/.g/g.ts",
+  "c:/dev/w/.u/e.ts",
+  "c:/dev/x/.y/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/.*/*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with recursive wildcards that match directories with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with recursive wildcards that match directories with jsonSourceFile api.js
new file mode 100644
index 0000000000000..949066398022a
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with recursive wildcards that match directories with jsonSourceFile api.js	
@@ -0,0 +1,61 @@
+config:
+{
+ "include": [
+  "**/.*/*"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/.z/c.ts",
+  "c:/dev/g.min.js/.g/g.ts",
+  "c:/dev/w/.u/e.ts",
+  "c:/dev/x/.y/a.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/.*/*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with recursive wildcards that match nothing with json api.js b/tests/baselines/reference/config/matchFiles/with recursive wildcards that match nothing with json api.js
new file mode 100644
index 0000000000000..a2f4a468a14c2
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with recursive wildcards that match nothing with json api.js	
@@ -0,0 +1,63 @@
+config:
+{
+ "include": [
+  "x/**/.y/*",
+  ".z/**/.*"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/.y/a.ts",
+  "c:/dev/.z/.b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/**/.y/*",
+   ".z/**/.*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {
+  "c:/dev/x": "WatchDirectoryFlags.Recursive",
+  "c:/dev/.z": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with recursive wildcards that match nothing with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with recursive wildcards that match nothing with jsonSourceFile api.js
new file mode 100644
index 0000000000000..e30f906e18d97
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with recursive wildcards that match nothing with jsonSourceFile api.js	
@@ -0,0 +1,62 @@
+config:
+{
+ "include": [
+  "x/**/.y/*",
+  ".z/**/.*"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/.y/a.ts",
+  "c:/dev/.z/.b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/**/.y/*",
+   ".z/**/.*"
+  ]
+ },
+ "wildcardDirectories": {
+  "c:/dev/x": "WatchDirectoryFlags.Recursive",
+  "c:/dev/.z": "WatchDirectoryFlags.Recursive"
+ },
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with wildcard excludes that implicitly exclude dotted files with json api.js b/tests/baselines/reference/config/matchFiles/with wildcard excludes that implicitly exclude dotted files with json api.js
new file mode 100644
index 0000000000000..63be05aeba969
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with wildcard excludes that implicitly exclude dotted files with json api.js	
@@ -0,0 +1,62 @@
+config:
+{
+ "include": [
+  "**/.*/*"
+ ],
+ "exclude": [
+  "**/*"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/.*/*"
+  ],
+  "exclude": [
+   "**/*"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/.*/*"]' and 'exclude' paths were '["**/*"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with wildcard excludes that implicitly exclude dotted files with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with wildcard excludes that implicitly exclude dotted files with jsonSourceFile api.js
new file mode 100644
index 0000000000000..226284fe14f52
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with wildcard excludes that implicitly exclude dotted files with jsonSourceFile api.js	
@@ -0,0 +1,61 @@
+config:
+{
+ "include": [
+  "**/.*/*"
+ ],
+ "exclude": [
+  "**/*"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "**/.*/*"
+  ],
+  "exclude": [
+   "**/*"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+error TS18003: No inputs were found in config file 'c:/dev/tsconfig.json'. Specified 'include' paths were '["**/.*/*"]' and 'exclude' paths were '["**/*"]'.
+
diff --git a/tests/baselines/reference/config/matchFiles/with wildcard excludes with json api.js b/tests/baselines/reference/config/matchFiles/with wildcard excludes with json api.js
new file mode 100644
index 0000000000000..c5711d8d642dc
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with wildcard excludes with json api.js	
@@ -0,0 +1,123 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "z/a.ts",
+  "z/abz.ts",
+  "z/aba.ts",
+  "x/b.ts"
+ ],
+ "exclude": [
+  "*.ts",
+  "z/??z.ts",
+  "*/b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/z/a.ts",
+  "c:/dev/z/aba.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "z/a.ts",
+   "z/abz.ts",
+   "z/aba.ts",
+   "x/b.ts"
+  ],
+  "exclude": [
+   "*.ts",
+   "z/??z.ts",
+   "*/b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/with wildcard excludes with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/with wildcard excludes with jsonSourceFile api.js
new file mode 100644
index 0000000000000..689aac8dba546
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/with wildcard excludes with jsonSourceFile api.js	
@@ -0,0 +1,122 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts",
+  "z/a.ts",
+  "z/abz.ts",
+  "z/aba.ts",
+  "x/b.ts"
+ ],
+ "exclude": [
+  "*.ts",
+  "z/??z.ts",
+  "*/b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/z/a.ts",
+  "c:/dev/z/aba.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts",
+   "z/a.ts",
+   "z/abz.ts",
+   "z/aba.ts",
+   "x/b.ts"
+  ],
+  "exclude": [
+   "*.ts",
+   "z/??z.ts",
+   "*/b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/without exclusions with literal file list with json api.js b/tests/baselines/reference/config/matchFiles/without exclusions with literal file list with json api.js
new file mode 100644
index 0000000000000..c3e7aa2995368
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/without exclusions with literal file list with json api.js	
@@ -0,0 +1,105 @@
+config:
+{
+ "files": [
+  "a.ts",
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "files": [
+   "a.ts",
+   "b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/without exclusions with literal file list with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/without exclusions with literal file list with jsonSourceFile api.js
new file mode 100644
index 0000000000000..10fe1fcd3ae8e
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/without exclusions with literal file list with jsonSourceFile api.js	
@@ -0,0 +1,104 @@
+config:
+{
+ "files": [
+  "a.ts",
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "files": [
+   "a.ts",
+   "b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/without exclusions with literal include list with json api.js b/tests/baselines/reference/config/matchFiles/without exclusions with literal include list with json api.js
new file mode 100644
index 0000000000000..7bd60f518d523
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/without exclusions with literal include list with json api.js	
@@ -0,0 +1,105 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/without exclusions with literal include list with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/without exclusions with literal include list with jsonSourceFile api.js
new file mode 100644
index 0000000000000..69c1aa6c26540
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/without exclusions with literal include list with jsonSourceFile api.js	
@@ -0,0 +1,104 @@
+config:
+{
+ "include": [
+  "a.ts",
+  "b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/a.d.ts]
+
+
+//// [c:/dev/a.js]
+
+
+//// [c:/dev/a.ts]
+
+
+//// [c:/dev/b.js]
+
+
+//// [c:/dev/b.ts]
+
+
+//// [c:/dev/c.d.ts]
+
+
+//// [c:/dev/js/a.js]
+
+
+//// [c:/dev/js/ab.min.js]
+
+
+//// [c:/dev/js/b.js]
+
+
+//// [c:/dev/js/d.min.js]
+
+
+//// [c:/dev/x/a.ts]
+
+
+//// [c:/dev/x/aa.ts]
+
+
+//// [c:/dev/x/b.ts]
+
+
+//// [c:/dev/x/y/a.ts]
+
+
+//// [c:/dev/x/y/b.ts]
+
+
+//// [c:/dev/z/a.ts]
+
+
+//// [c:/dev/z/aba.ts]
+
+
+//// [c:/dev/z/abz.ts]
+
+
+//// [c:/dev/z/b.ts]
+
+
+//// [c:/dev/z/bba.ts]
+
+
+//// [c:/dev/z/bbz.ts]
+
+
+//// [c:/ext/b/a..b.ts]
+
+
+//// [c:/ext/ext.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/a.ts",
+  "c:/dev/b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "a.ts",
+   "b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/without wildcards with json api.js b/tests/baselines/reference/config/matchFiles/without wildcards with json api.js
new file mode 100644
index 0000000000000..04924a1e9faae
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/without wildcards with json api.js	
@@ -0,0 +1,60 @@
+config:
+{
+ "include": [
+  "x/.y/a.ts",
+  "c:/dev/.z/.b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/.y/a.ts",
+  "c:/dev/.z/.b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/.y/a.ts",
+   "c:/dev/.z/.b.ts"
+  ],
+  "compileOnSave": false
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/matchFiles/without wildcards with jsonSourceFile api.js b/tests/baselines/reference/config/matchFiles/without wildcards with jsonSourceFile api.js
new file mode 100644
index 0000000000000..5798a483fb368
--- /dev/null
+++ b/tests/baselines/reference/config/matchFiles/without wildcards with jsonSourceFile api.js	
@@ -0,0 +1,59 @@
+config:
+{
+ "include": [
+  "x/.y/a.ts",
+  "c:/dev/.z/.b.ts"
+ ]
+}
+Fs::
+//// [c:/dev/.z/.b.ts]
+
+
+//// [c:/dev/.z/c.ts]
+
+
+//// [c:/dev/g.min.js/.g/g.ts]
+
+
+//// [c:/dev/w/.u/e.ts]
+
+
+//// [c:/dev/x/.y/a.ts]
+
+
+//// [c:/dev/x/d.ts]
+
+
+//// [c:/dev/x/y/.e.ts]
+
+
+//// [c:/dev/x/y/d.ts]
+
+
+
+configFileName:: c:/dev/tsconfig.json
+Result
+{
+ "options": {
+  "configFilePath": "c:/dev/tsconfig.json"
+ },
+ "fileNames": [
+  "c:/dev/x/.y/a.ts",
+  "c:/dev/.z/.b.ts"
+ ],
+ "typeAcquisition": {
+  "enable": false,
+  "include": [],
+  "exclude": []
+ },
+ "raw": {
+  "include": [
+   "x/.y/a.ts",
+   "c:/dev/.z/.b.ts"
+  ]
+ },
+ "wildcardDirectories": {},
+ "compileOnSave": false
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/allow dotted files and folders when explicitly requested with json api.js b/tests/baselines/reference/config/tsconfigParsing/allow dotted files and folders when explicitly requested with json api.js
new file mode 100644
index 0000000000000..b423b7113465e
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/allow dotted files and folders when explicitly requested with json api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/..c.ts]
+
+
+//// [/apath/.b.ts]
+
+
+//// [/apath/.git/a.ts]
+
+
+//// [/apath/test.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                    "files": ["/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"]
+                }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/apath/.git/a.ts,/apath/.b.ts,/apath/..c.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/allow dotted files and folders when explicitly requested with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/allow dotted files and folders when explicitly requested with jsonSourceFile api.js
new file mode 100644
index 0000000000000..b423b7113465e
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/allow dotted files and folders when explicitly requested with jsonSourceFile api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/..c.ts]
+
+
+//// [/apath/.b.ts]
+
+
+//// [/apath/.git/a.ts]
+
+
+//// [/apath/test.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                    "files": ["/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"]
+                }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/apath/.git/a.ts,/apath/.b.ts,/apath/..c.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/correctly parses wild card directories from implicit glob when two keys differ only in directory seperator with json api.js b/tests/baselines/reference/config/tsconfigParsing/correctly parses wild card directories from implicit glob when two keys differ only in directory seperator with json api.js
new file mode 100644
index 0000000000000..9dde48a11b419
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/correctly parses wild card directories from implicit glob when two keys differ only in directory seperator with json api.js	
@@ -0,0 +1,8 @@
+Fs::
+//// [/foo.bar/tsconfig.json]
+{"include":["./","./**/*.json"]}
+
+
+configFileName:: /foo.bar/tsconfig.json
+Wildcards::
+/foo.bar: WatchDirectoryFlags.Recursive
diff --git a/tests/baselines/reference/config/tsconfigParsing/correctly parses wild card directories from implicit glob when two keys differ only in directory seperator with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/correctly parses wild card directories from implicit glob when two keys differ only in directory seperator with jsonSourceFile api.js
new file mode 100644
index 0000000000000..9dde48a11b419
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/correctly parses wild card directories from implicit glob when two keys differ only in directory seperator with jsonSourceFile api.js	
@@ -0,0 +1,8 @@
+Fs::
+//// [/foo.bar/tsconfig.json]
+{"include":["./","./**/*.json"]}
+
+
+configFileName:: /foo.bar/tsconfig.json
+Wildcards::
+/foo.bar: WatchDirectoryFlags.Recursive
diff --git a/tests/baselines/reference/config/tsconfigParsing/does not generate errors for empty files list when one or more references are provided with json api.js b/tests/baselines/reference/config/tsconfigParsing/does not generate errors for empty files list when one or more references are provided with json api.js
new file mode 100644
index 0000000000000..b294e38156dfb
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/does not generate errors for empty files list when one or more references are provided with json api.js	
@@ -0,0 +1,16 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "files": [],
+                "references": [{ "path": "/apath" }]
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/does not generate errors for empty files list when one or more references are provided with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/does not generate errors for empty files list when one or more references are provided with jsonSourceFile api.js
new file mode 100644
index 0000000000000..b294e38156dfb
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/does not generate errors for empty files list when one or more references are provided with jsonSourceFile api.js	
@@ -0,0 +1,16 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "files": [],
+                "references": [{ "path": "/apath" }]
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/exclude declarationDir unless overridden with json api.js b/tests/baselines/reference/config/tsconfigParsing/exclude declarationDir unless overridden with json api.js
new file mode 100644
index 0000000000000..bcb7a1296f406
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/exclude declarationDir unless overridden with json api.js	
@@ -0,0 +1,42 @@
+Fs::
+//// [/a.ts]
+
+
+//// [/declarations/a.d.ts]
+
+
+//// [/tsconfig.json]
+{
+                "compilerOptions": {
+                    "declarationDir": "declarations"
+                }
+            }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/a.ts
+Errors::
+
+
+Fs::
+//// [/a.ts]
+
+
+//// [/declarations/a.d.ts]
+
+
+//// [/tsconfig.json]
+{
+                "compilerOptions": {
+                    "declarationDir": "declarations"
+                },
+                "exclude": [ "types" ]
+            }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/a.ts,/declarations/a.d.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/exclude declarationDir unless overridden with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/exclude declarationDir unless overridden with jsonSourceFile api.js
new file mode 100644
index 0000000000000..bcb7a1296f406
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/exclude declarationDir unless overridden with jsonSourceFile api.js	
@@ -0,0 +1,42 @@
+Fs::
+//// [/a.ts]
+
+
+//// [/declarations/a.d.ts]
+
+
+//// [/tsconfig.json]
+{
+                "compilerOptions": {
+                    "declarationDir": "declarations"
+                }
+            }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/a.ts
+Errors::
+
+
+Fs::
+//// [/a.ts]
+
+
+//// [/declarations/a.d.ts]
+
+
+//// [/tsconfig.json]
+{
+                "compilerOptions": {
+                    "declarationDir": "declarations"
+                },
+                "exclude": [ "types" ]
+            }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/a.ts,/declarations/a.d.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/exclude outDir unless overridden with json api.js b/tests/baselines/reference/config/tsconfigParsing/exclude outDir unless overridden with json api.js
new file mode 100644
index 0000000000000..7f94ebf06e2a2
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/exclude outDir unless overridden with json api.js	
@@ -0,0 +1,42 @@
+Fs::
+//// [/b.ts]
+
+
+//// [/bin/a.ts]
+
+
+//// [/tsconfig.json]
+{
+                "compilerOptions": {
+                    "outDir": "bin"
+                }
+            }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/b.ts
+Errors::
+
+
+Fs::
+//// [/b.ts]
+
+
+//// [/bin/a.ts]
+
+
+//// [/tsconfig.json]
+{
+                "compilerOptions": {
+                    "outDir": "bin"
+                },
+                "exclude": [ "obj" ]
+            }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/b.ts,/bin/a.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/exclude outDir unless overridden with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/exclude outDir unless overridden with jsonSourceFile api.js
new file mode 100644
index 0000000000000..7f94ebf06e2a2
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/exclude outDir unless overridden with jsonSourceFile api.js	
@@ -0,0 +1,42 @@
+Fs::
+//// [/b.ts]
+
+
+//// [/bin/a.ts]
+
+
+//// [/tsconfig.json]
+{
+                "compilerOptions": {
+                    "outDir": "bin"
+                }
+            }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/b.ts
+Errors::
+
+
+Fs::
+//// [/b.ts]
+
+
+//// [/bin/a.ts]
+
+
+//// [/tsconfig.json]
+{
+                "compilerOptions": {
+                    "outDir": "bin"
+                },
+                "exclude": [ "obj" ]
+            }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/b.ts,/bin/a.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for directory with no .ts files with json api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for directory with no .ts files with json api.js
new file mode 100644
index 0000000000000..997bf7716e28d
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for directory with no .ts files with json api.js	
@@ -0,0 +1,15 @@
+Fs::
+//// [/apath/a.js]
+
+
+//// [/apath/tsconfig.json]
+{
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for directory with no .ts files with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for directory with no .ts files with jsonSourceFile api.js
new file mode 100644
index 0000000000000..997bf7716e28d
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for directory with no .ts files with jsonSourceFile api.js	
@@ -0,0 +1,15 @@
+Fs::
+//// [/apath/a.js]
+
+
+//// [/apath/tsconfig.json]
+{
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for empty directory with json api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty directory with json api.js
new file mode 100644
index 0000000000000..30621abe1050d
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty directory with json api.js	
@@ -0,0 +1,15 @@
+Fs::
+//// [/apath/tsconfig.json]
+{
+                "compilerOptions": {
+                    "allowJs": true
+                }
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for empty directory with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty directory with jsonSourceFile api.js
new file mode 100644
index 0000000000000..30621abe1050d
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty directory with jsonSourceFile api.js	
@@ -0,0 +1,15 @@
+Fs::
+//// [/apath/tsconfig.json]
+{
+                "compilerOptions": {
+                    "allowJs": true
+                }
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list when no references are provided with json api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list when no references are provided with json api.js
new file mode 100644
index 0000000000000..9f5abbd52f4c4
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list when no references are provided with json api.js	
@@ -0,0 +1,17 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "files": [],
+                "references": []
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18002: The 'files' list in config file '/apath/tsconfig.json' is empty.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list when no references are provided with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list when no references are provided with jsonSourceFile api.js
new file mode 100644
index 0000000000000..f906df49bab19
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list when no references are provided with jsonSourceFile api.js	
@@ -0,0 +1,20 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "files": [],
+                "references": []
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+/apath/tsconfig.json:2:26 - error TS18002: The 'files' list in config file '/apath/tsconfig.json' is empty.
+
+2                 "files": [],
+                           ~~
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list with json api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list with json api.js
new file mode 100644
index 0000000000000..ae92900487d30
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list with json api.js	
@@ -0,0 +1,16 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "files": []
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18002: The 'files' list in config file '/apath/tsconfig.json' is empty.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list with jsonSourceFile api.js
new file mode 100644
index 0000000000000..2381889cf47f4
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty files list with jsonSourceFile api.js	
@@ -0,0 +1,19 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "files": []
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+/apath/tsconfig.json:2:26 - error TS18002: The 'files' list in config file '/apath/tsconfig.json' is empty.
+
+2                 "files": []
+                           ~~
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for empty include with json api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty include with json api.js
new file mode 100644
index 0000000000000..b22486c178a36
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty include with json api.js	
@@ -0,0 +1,16 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "include": []
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '[]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for empty include with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty include with jsonSourceFile api.js
new file mode 100644
index 0000000000000..b22486c178a36
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for empty include with jsonSourceFile api.js	
@@ -0,0 +1,16 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "include": []
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '[]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for includes with outDir with json api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for includes with outDir with json api.js
new file mode 100644
index 0000000000000..005596ba660c3
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for includes with outDir with json api.js	
@@ -0,0 +1,19 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "compilerOptions": {
+                    "outDir": "./"
+                },
+                "include": ["**/*"]
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '["./"]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for includes with outDir with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for includes with outDir with jsonSourceFile api.js
new file mode 100644
index 0000000000000..005596ba660c3
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for includes with outDir with jsonSourceFile api.js	
@@ -0,0 +1,19 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "compilerOptions": {
+                    "outDir": "./"
+                },
+                "include": ["**/*"]
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '["**/*"]' and 'exclude' paths were '["./"]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors for when invalid comment type present in tsconfig with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors for when invalid comment type present in tsconfig with jsonSourceFile api.js
new file mode 100644
index 0000000000000..de2ce52a49aca
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors for when invalid comment type present in tsconfig with jsonSourceFile api.js	
@@ -0,0 +1,55 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+              "compilerOptions": {
+                ## this comment does cause issues
+                "types" : [
+                ]
+              }
+            }
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+/apath/a.ts
+Errors::
+/apath/tsconfig.json:3:17 - error TS1327: String literal with double quotes expected.
+
+3                 ## this comment does cause issues
+                  ~
+/apath/tsconfig.json:3:17 - error TS5023: Unknown compiler option '#'.
+
+3                 ## this comment does cause issues
+                  ~
+/apath/tsconfig.json:3:18 - error TS1328: Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal.
+
+3                 ## this comment does cause issues
+                   ~
+/apath/tsconfig.json:3:20 - error TS1327: String literal with double quotes expected.
+
+3                 ## this comment does cause issues
+                     ~~~~
+/apath/tsconfig.json:3:20 - error TS5023: Unknown compiler option 'this'.
+
+3                 ## this comment does cause issues
+                     ~~~~
+/apath/tsconfig.json:3:25 - error TS1328: Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal.
+
+3                 ## this comment does cause issues
+                          ~~~~~~~
+/apath/tsconfig.json:3:33 - error TS1136: Property assignment expected.
+
+3                 ## this comment does cause issues
+                                  ~~~~
+/apath/tsconfig.json:3:38 - error TS1136: Property assignment expected.
+
+3                 ## this comment does cause issues
+                                       ~~~~~
+/apath/tsconfig.json:3:44 - error TS1136: Property assignment expected.
+
+3                 ## this comment does cause issues
+                                             ~~~~~~
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors when files is not string with json api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors when files is not string with json api.js
new file mode 100644
index 0000000000000..9e9aa45cb026d
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors when files is not string with json api.js	
@@ -0,0 +1,14 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{"files":[{"compilerOptions":{"experimentalDecorators":true,"allowJs":true}}]}
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS5024: Compiler option 'files' requires a value of type string.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors when files is not string with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors when files is not string with jsonSourceFile api.js
new file mode 100644
index 0000000000000..5b0a30c38f4eb
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors when files is not string with jsonSourceFile api.js	
@@ -0,0 +1,17 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{"files":[{"compilerOptions":{"experimentalDecorators":true,"allowJs":true}}]}
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+/apath/tsconfig.json:1:11 - error TS5024: Compiler option 'files' requires a value of type string.
+
+1 {"files":[{"compilerOptions":{"experimentalDecorators":true,"allowJs":true}}]}
+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors when include is not string with json api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors when include is not string with json api.js
new file mode 100644
index 0000000000000..b4e1615120a9f
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors when include is not string with json api.js	
@@ -0,0 +1,15 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{"include":[["./**/*.ts"]]}
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+error TS5024: Compiler option 'include' requires a value of type string.
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '[["./**/*.ts"]]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/generates errors when include is not string with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/generates errors when include is not string with jsonSourceFile api.js
new file mode 100644
index 0000000000000..2f9c86b9a8254
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/generates errors when include is not string with jsonSourceFile api.js	
@@ -0,0 +1,18 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{"include":[["./**/*.ts"]]}
+
+
+configFileName:: /apath/tsconfig.json
+FileNames::
+
+Errors::
+/apath/tsconfig.json:1:13 - error TS5024: Compiler option 'include' requires a value of type string.
+
+1 {"include":[["./**/*.ts"]]}
+              ~~~~~~~~~~~~~
+error TS18003: No inputs were found in config file '/apath/tsconfig.json'. Specified 'include' paths were '[["./**/*.ts"]]' and 'exclude' paths were '[]'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/handles escaped characters in strings correctly jsonParse.js b/tests/baselines/reference/config/tsconfigParsing/handles escaped characters in strings correctly jsonParse.js
new file mode 100644
index 0000000000000..03adeb8b825a8
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/handles escaped characters in strings correctly jsonParse.js	
@@ -0,0 +1,29 @@
+Input::
+{
+            "exclude": [
+                "xx\"//files"
+            ]
+        }
+Config::
+{
+ "exclude": [
+  "xx\"//files"
+ ]
+}
+Errors::
+
+
+Input::
+{
+            "exclude": [
+                "xx\\" // end of line comment
+            ]
+        }
+Config::
+{
+ "exclude": [
+  "xx\\"
+ ]
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/ignore dotted files and folders with json api.js b/tests/baselines/reference/config/tsconfigParsing/ignore dotted files and folders with json api.js
new file mode 100644
index 0000000000000..8909e3dcbfe78
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/ignore dotted files and folders with json api.js	
@@ -0,0 +1,22 @@
+Fs::
+//// [/apath/..c.ts]
+
+
+//// [/apath/.b.ts]
+
+
+//// [/apath/.git/a.ts]
+
+
+//// [/apath/test.ts]
+
+
+//// [/apath/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
+FileNames::
+/apath/test.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/ignore dotted files and folders with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/ignore dotted files and folders with jsonSourceFile api.js
new file mode 100644
index 0000000000000..8909e3dcbfe78
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/ignore dotted files and folders with jsonSourceFile api.js	
@@ -0,0 +1,22 @@
+Fs::
+//// [/apath/..c.ts]
+
+
+//// [/apath/.b.ts]
+
+
+//// [/apath/.git/a.ts]
+
+
+//// [/apath/test.ts]
+
+
+//// [/apath/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
+FileNames::
+/apath/test.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/implicitly exclude common package folders with json api.js b/tests/baselines/reference/config/tsconfigParsing/implicitly exclude common package folders with json api.js
new file mode 100644
index 0000000000000..30c9607be163b
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/implicitly exclude common package folders with json api.js	
@@ -0,0 +1,25 @@
+Fs::
+//// [/bower_components/b.ts]
+
+
+//// [/d.ts]
+
+
+//// [/folder/e.ts]
+
+
+//// [/jspm_packages/c.ts]
+
+
+//// [/node_modules/a.ts]
+
+
+//// [/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
+FileNames::
+/d.ts,/folder/e.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/implicitly exclude common package folders with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/implicitly exclude common package folders with jsonSourceFile api.js
new file mode 100644
index 0000000000000..30c9607be163b
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/implicitly exclude common package folders with jsonSourceFile api.js	
@@ -0,0 +1,25 @@
+Fs::
+//// [/bower_components/b.ts]
+
+
+//// [/d.ts]
+
+
+//// [/folder/e.ts]
+
+
+//// [/jspm_packages/c.ts]
+
+
+//// [/node_modules/a.ts]
+
+
+//// [/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
+FileNames::
+/d.ts,/folder/e.ts
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/keeps string content untouched jsonParse.js b/tests/baselines/reference/config/tsconfigParsing/keeps string content untouched jsonParse.js
new file mode 100644
index 0000000000000..93db9affa44ec
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/keeps string content untouched jsonParse.js	
@@ -0,0 +1,29 @@
+Input::
+{
+            "exclude": [
+                "xx//file.d.ts"
+            ]
+        }
+Config::
+{
+ "exclude": [
+  "xx//file.d.ts"
+ ]
+}
+Errors::
+
+
+Input::
+{
+            "exclude": [
+                "xx/*file.d.ts*/"
+            ]
+        }
+Config::
+{
+ "exclude": [
+  "xx/*file.d.ts*/"
+ ]
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/parse and re-emit tsconfig.json file with diagnostics.js b/tests/baselines/reference/config/tsconfigParsing/parse and re-emit tsconfig.json file with diagnostics.js
new file mode 100644
index 0000000000000..dc6be67e56c72
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/parse and re-emit tsconfig.json file with diagnostics.js	
@@ -0,0 +1,28 @@
+Initial::
+{
+                "compilerOptions": {
+                    "allowJs": true
+                    // Some comments
+                    "outDir": "bin"
+                }
+                "files": ["file1.ts"]
+            }
+Result::
+{
+ "compilerOptions": {
+  "allowJs": true,
+  "outDir": "bin"
+ },
+ "files": [
+  "file1.ts"
+ ]
+}
+Errors::
+config.json:5:21 - error TS1005: ',' expected.
+
+5                     "outDir": "bin"
+                      ~~~~~~~~
+config.json:7:17 - error TS1005: ',' expected.
+
+7                 "files": ["file1.ts"]
+                  ~~~~~~~
diff --git a/tests/baselines/reference/config/tsconfigParsing/parses wildcard directories even when parent directories have dots with json api.js b/tests/baselines/reference/config/tsconfigParsing/parses wildcard directories even when parent directories have dots with json api.js
new file mode 100644
index 0000000000000..77f4867a42f78
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/parses wildcard directories even when parent directories have dots with json api.js	
@@ -0,0 +1,8 @@
+Fs::
+//// [/foo.bar/tsconfig.json]
+{"include":["src"]}
+
+
+configFileName:: /foo.bar/tsconfig.json
+Wildcards::
+/foo.bar/src: WatchDirectoryFlags.Recursive
diff --git a/tests/baselines/reference/config/tsconfigParsing/parses wildcard directories even when parent directories have dots with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/parses wildcard directories even when parent directories have dots with jsonSourceFile api.js
new file mode 100644
index 0000000000000..77f4867a42f78
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/parses wildcard directories even when parent directories have dots with jsonSourceFile api.js	
@@ -0,0 +1,8 @@
+Fs::
+//// [/foo.bar/tsconfig.json]
+{"include":["src"]}
+
+
+configFileName:: /foo.bar/tsconfig.json
+Wildcards::
+/foo.bar/src: WatchDirectoryFlags.Recursive
diff --git a/tests/baselines/reference/config/tsconfigParsing/returns config object without comments jsonParse.js b/tests/baselines/reference/config/tsconfigParsing/returns config object without comments jsonParse.js
new file mode 100644
index 0000000000000..af0aa1822f94e
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/returns config object without comments jsonParse.js	
@@ -0,0 +1,33 @@
+Input::
+{ // Excluded files
+            "exclude": [
+                // Exclude d.ts
+                "file.d.ts"
+            ]
+        }
+Config::
+{
+ "exclude": [
+  "file.d.ts"
+ ]
+}
+Errors::
+
+
+Input::
+{
+            /* Excluded
+                    Files
+            */
+            "exclude": [
+                /* multiline comments can be in the middle of a line */"file.d.ts"
+            ]
+        }
+Config::
+{
+ "exclude": [
+  "file.d.ts"
+ ]
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/returns empty config for file with comments only jsonParse.js b/tests/baselines/reference/config/tsconfigParsing/returns empty config for file with comments only jsonParse.js
new file mode 100644
index 0000000000000..40357b1339bd5
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/returns empty config for file with comments only jsonParse.js	
@@ -0,0 +1,13 @@
+Input::
+// Comment
+Config::
+{}
+Errors::
+
+
+Input::
+/* Comment*/
+Config::
+{}
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/returns empty config for file with only whitespaces jsonParse.js b/tests/baselines/reference/config/tsconfigParsing/returns empty config for file with only whitespaces jsonParse.js
new file mode 100644
index 0000000000000..4c9fe24ded526
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/returns empty config for file with only whitespaces jsonParse.js	
@@ -0,0 +1,13 @@
+Input::
+
+Config::
+{}
+Errors::
+
+
+Input::
+ 
+Config::
+{}
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/returns empty config when config is empty object jsonParse.js b/tests/baselines/reference/config/tsconfigParsing/returns empty config when config is empty object jsonParse.js
new file mode 100644
index 0000000000000..7e40d9f45dc7c
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/returns empty config when config is empty object jsonParse.js	
@@ -0,0 +1,6 @@
+Input::
+{}
+Config::
+{}
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/returns error when tsconfig have excludes with json api.js b/tests/baselines/reference/config/tsconfigParsing/returns error when tsconfig have excludes with json api.js
new file mode 100644
index 0000000000000..eb0f0e1d547cb
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/returns error when tsconfig have excludes with json api.js	
@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/foge.ts]
+
+
+//// [/apath/test.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                    "compilerOptions": {
+                        "lib": ["es5"]
+                    },
+                    "excludes": [
+                        "foge.ts"
+                    ]
+                }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/apath/foge.ts,/apath/test.ts
+Errors::
+error TS6114: Unknown option 'excludes'. Did you mean 'exclude'?
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/returns error when tsconfig have excludes with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsing/returns error when tsconfig have excludes with jsonSourceFile api.js
new file mode 100644
index 0000000000000..7e0de849d67b8
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/returns error when tsconfig have excludes with jsonSourceFile api.js	
@@ -0,0 +1,27 @@
+Fs::
+//// [/apath/foge.ts]
+
+
+//// [/apath/test.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                    "compilerOptions": {
+                        "lib": ["es5"]
+                    },
+                    "excludes": [
+                        "foge.ts"
+                    ]
+                }
+
+
+configFileName:: tsconfig.json
+FileNames::
+/apath/foge.ts,/apath/test.ts
+Errors::
+tsconfig.json:5:21 - error TS6114: Unknown option 'excludes'. Did you mean 'exclude'?
+
+5                     "excludes": [
+                      ~~~~~~~~~~
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/returns object when users correctly specify library jsonParse.js b/tests/baselines/reference/config/tsconfigParsing/returns object when users correctly specify library jsonParse.js
new file mode 100644
index 0000000000000..da573d5049343
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/returns object when users correctly specify library jsonParse.js	
@@ -0,0 +1,34 @@
+Input::
+{
+            "compilerOptions": {
+                "lib": ["es5"]
+            }
+        }
+Config::
+{
+ "compilerOptions": {
+  "lib": [
+   "es5"
+  ]
+ }
+}
+Errors::
+
+
+Input::
+{
+            "compilerOptions": {
+                "lib": ["es5", "es6"]
+            }
+        }
+Config::
+{
+ "compilerOptions": {
+  "lib": [
+   "es5",
+   "es6"
+  ]
+ }
+}
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsing/returns object with error when json is invalid jsonParse.js b/tests/baselines/reference/config/tsconfigParsing/returns object with error when json is invalid jsonParse.js
new file mode 100644
index 0000000000000..8e8b752c475ff
--- /dev/null
+++ b/tests/baselines/reference/config/tsconfigParsing/returns object with error when json is invalid jsonParse.js	
@@ -0,0 +1,10 @@
+Input::
+invalid
+Config::
+{}
+Errors::
+apath/tsconfig.json:1:1 - error TS1005: '{' expected.
+
+1 invalid
+  ~~~~~~~
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/different options with json api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/different options with json api.js
index cc94977b4a120..10368b04e7c7f 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/different options with json api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/different options with json api.js	
@@ -1,109 +1,173 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "watchFile": "UseFsEvents"
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 4
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "watchDirectory": "UseFsEvents"
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchDirectory": 0
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "fallbackPolling": "DynamicPriority"
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "fallbackPolling": 2
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "synchronousWatchDirectory": true
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "synchronousWatchDirectory": true
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "excludeDirectories": [
    "**/temp"
   ]
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "excludeDirectories": [
   "/**/temp"
  ]
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "excludeFiles": [
    "**/temp/*.ts"
   ]
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "excludeFiles": [
   "/**/temp/*.ts"
  ]
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "excludeDirectories": [
    "**/../*"
   ]
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "excludeDirectories": []
 }
-Result: Errors::
-error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+Errors::
+error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "excludeFiles": [
    "**/../*"
   ]
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "excludeFiles": []
 }
-Result: Errors::
-error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+Errors::
+error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/different options with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/different options with jsonSourceFile api.js
index c335b45b794da..7748786348fe6 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/different options with jsonSourceFile api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/different options with jsonSourceFile api.js	
@@ -1,107 +1,179 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "watchFile": "UseFsEvents"
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 4
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "watchDirectory": "UseFsEvents"
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchDirectory": 0
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "fallbackPolling": "DynamicPriority"
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "fallbackPolling": 2
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "synchronousWatchDirectory": true
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "synchronousWatchDirectory": true
 }
-Result: Errors::
+Errors::
 
-Input:: {
+
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "excludeDirectories": [
    "**/temp"
   ]
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "excludeDirectories": [
   "/**/temp"
  ]
 }
-Result: Errors::
+Errors::
 
-Input:: {
+
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "excludeFiles": [
    "**/temp/*.ts"
   ]
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "excludeFiles": [
   "/**/temp/*.ts"
  ]
 }
-Result: Errors::
+Errors::
 
-Input:: {
+
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "excludeDirectories": [
    "**/../*"
   ]
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "excludeDirectories": []
 }
-Result: Errors::
-tsconfig.json:1:40 - error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+Errors::
+tsconfig.json:4:4 - error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+
+4    "**/../*"
+     ~~~~~~~~~
 
-1 {"watchOptions":{"excludeDirectories":["**/../*"]}}
-                                         ~~~~~~~~~
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "excludeFiles": [
    "**/../*"
   ]
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "excludeFiles": []
 }
-Result: Errors::
-tsconfig.json:1:34 - error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+Errors::
+tsconfig.json:4:4 - error TS5065: File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '**/../*'.
+
+4    "**/../*"
+     ~~~~~~~~~
 
-1 {"watchOptions":{"excludeFiles":["**/../*"]}}
-                                   ~~~~~~~~~
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/empty watchOptions specified option with json api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/empty watchOptions specified option with json api.js
index 2087b9e744a7c..f74ac086ed4bb 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/empty watchOptions specified option with json api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/empty watchOptions specified option with json api.js	
@@ -1,7 +1,15 @@
-Input:: {
- "watchOptions": {},
- "compileOnSave": false
-}
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
+ "watchOptions": {}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/empty watchOptions specified option with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/empty watchOptions specified option with jsonSourceFile api.js
index a25c30df65e04..f74ac086ed4bb 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/empty watchOptions specified option with jsonSourceFile api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/empty watchOptions specified option with jsonSourceFile api.js	
@@ -1,6 +1,15 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {}
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/no watchOptions specified option with json api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/no watchOptions specified option with json api.js
index b37ccbed5fdb3..9bca31fc72a95 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/no watchOptions specified option with json api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/no watchOptions specified option with json api.js	
@@ -1,6 +1,13 @@
-Input:: {
- "compileOnSave": false
-}
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/no watchOptions specified option with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/no watchOptions specified option with jsonSourceFile api.js
index 4c0e952e8eaa9..9bca31fc72a95 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/no watchOptions specified option with jsonSourceFile api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/no watchOptions specified option with jsonSourceFile api.js	
@@ -1,4 +1,13 @@
-Input:: {}
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/watch options extending passed in watch options with json api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/watch options extending passed in watch options with json api.js
index 8d535837e9f48..ecbeed86993fd 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/watch options extending passed in watch options with json api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/watch options extending passed in watch options with json api.js	
@@ -1,18 +1,33 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "watchFile": "UseFsEvents"
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 4
 }
-Result: Errors::
+Errors::
 
-Input:: {
- "compileOnSave": false
-}
+
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/watch options extending passed in watch options with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/watch options extending passed in watch options with jsonSourceFile api.js
index 3cef381ecb232..ecbeed86993fd 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/watch options extending passed in watch options with jsonSourceFile api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/watch options extending passed in watch options with jsonSourceFile api.js	
@@ -1,15 +1,33 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{
  "watchOptions": {
   "watchFile": "UseFsEvents"
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 4
 }
-Result: Errors::
+Errors::
 
-Input:: {}
+
+Fs::
+//// [/a.ts]
+
+
+//// [/tsconfig.json]
+{}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file with watchOptions with json api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file with watchOptions with json api.js
index 919753d60dbf5..92ed497816a48 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file with watchOptions with json api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file with watchOptions with json api.js	
@@ -1,24 +1,46 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/base.json]
+{"watchOptions":{"watchFile":"UseFsEventsOnParentDirectory","watchDirectory":"FixedPollingInterval"}}
+
+//// [/tsconfig.json]
+{
  "extends": "./base.json",
  "watchOptions": {
   "watchFile": "UseFsEvents"
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 4,
  "watchDirectory": 1
 }
-Result: Errors::
+Errors::
 
-Input:: {
- "extends": "./base.json",
- "compileOnSave": false
-}
+
+Fs::
+//// [/a.ts]
+
+
+//// [/base.json]
+{"watchOptions":{"watchFile":"UseFsEventsOnParentDirectory","watchDirectory":"FixedPollingInterval"}}
+
+//// [/tsconfig.json]
+{
+ "extends": "./base.json"
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 5,
  "watchDirectory": 1
 }
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file with watchOptions with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file with watchOptions with jsonSourceFile api.js
index 9e02dd5173914..92ed497816a48 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file with watchOptions with jsonSourceFile api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file with watchOptions with jsonSourceFile api.js	
@@ -1,22 +1,46 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/base.json]
+{"watchOptions":{"watchFile":"UseFsEventsOnParentDirectory","watchDirectory":"FixedPollingInterval"}}
+
+//// [/tsconfig.json]
+{
  "extends": "./base.json",
  "watchOptions": {
   "watchFile": "UseFsEvents"
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 4,
  "watchDirectory": 1
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/base.json]
+{"watchOptions":{"watchFile":"UseFsEventsOnParentDirectory","watchDirectory":"FixedPollingInterval"}}
+
+//// [/tsconfig.json]
+{
  "extends": "./base.json"
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 5,
  "watchDirectory": 1
 }
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file without watchOptions with json api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file without watchOptions with json api.js
index 2414081976400..e08330e344ff7 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file without watchOptions with json api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file without watchOptions with json api.js	
@@ -1,20 +1,42 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/base.json]
+{}
+
+//// [/tsconfig.json]
+{
  "extends": "./base.json",
  "watchOptions": {
   "watchFile": "UseFsEvents"
- },
- "compileOnSave": false
-}
+ }
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 4
 }
-Result: Errors::
+Errors::
 
-Input:: {
- "extends": "./base.json",
- "compileOnSave": false
-}
+
+Fs::
+//// [/a.ts]
+
+
+//// [/base.json]
+{}
+
+//// [/tsconfig.json]
+{
+ "extends": "./base.json"
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file without watchOptions with jsonSourceFile api.js b/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file without watchOptions with jsonSourceFile api.js
index 476bc99e4d83f..e08330e344ff7 100644
--- a/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file without watchOptions with jsonSourceFile api.js	
+++ b/tests/baselines/reference/config/tsconfigParsingWatchOptions/when extending config file without watchOptions with jsonSourceFile api.js	
@@ -1,18 +1,42 @@
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/base.json]
+{}
+
+//// [/tsconfig.json]
+{
  "extends": "./base.json",
  "watchOptions": {
   "watchFile": "UseFsEvents"
  }
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 {
  "watchFile": 4
 }
-Result: Errors::
+Errors::
+
 
-Input:: {
+Fs::
+//// [/a.ts]
+
+
+//// [/base.json]
+{}
+
+//// [/tsconfig.json]
+{
  "extends": "./base.json"
-}
+}
+
+
+configFileName:: tsconfig.json
 Result: WatchOptions::
 
-Result: Errors::
+Errors::
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/default-setup-was-created-correctly.js b/tests/baselines/reference/tsc/projectReferencesConfig/default-setup-was-created-correctly.js
new file mode 100644
index 0000000000000..78de2be6d295b
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/default-setup-was-created-correctly.js
@@ -0,0 +1,111 @@
+Input::
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/primary/a.ts]
+export { };
+
+//// [/primary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+//// [/secondary/b.ts]
+import * as mod_0 from "../primary/a"
+
+//// [/secondary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [
+  {
+   "path": "../primary"
+  }
+ ]
+}
+
+
+
+Output::
+/lib/tsc --p /primary/tsconfig.json
+exitCode:: ExitStatus.Success
+
+
+//// [/primary/bin/a.d.ts]
+export {};
+
+
+//// [/primary/bin/a.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/primary/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../a.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-3531955686-export { };","signature":"-3531856636-export {};\n"}],"root":[2],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[1,2],"latestChangedDtsFile":"./a.d.ts"},"version":"FakeTSVersion"}
+
+//// [/primary/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../a.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../a.ts": {
+        "original": {
+          "version": "-3531955686-export { };",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-3531955686-export { };",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        2,
+        "../a.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "semanticDiagnosticsPerFile": [
+      "../../lib/lib.d.ts",
+      "../a.ts"
+    ],
+    "latestChangedDtsFile": "./a.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 820
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/does-not-error-when-the-referenced-project-doesnt-have-composite-if-its-a-container-project.js b/tests/baselines/reference/tsc/projectReferencesConfig/does-not-error-when-the-referenced-project-doesnt-have-composite-if-its-a-container-project.js
new file mode 100644
index 0000000000000..563543266e94f
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/does-not-error-when-the-referenced-project-doesnt-have-composite-if-its-a-container-project.js
@@ -0,0 +1,72 @@
+Input::
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/primary/a.ts]
+export { };
+
+//// [/primary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": false,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+//// [/reference/b.ts]
+import * as mod_0 from "../primary/a"
+
+//// [/reference/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [
+  {
+   "path": "../primary"
+  }
+ ],
+ "files": []
+}
+
+
+
+Output::
+/lib/tsc --p /reference/tsconfig.json
+exitCode:: ExitStatus.Success
+
+
+//// [/reference/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":[],"fileInfos":[],"root":[],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[]},"version":"FakeTSVersion"}
+
+//// [/reference/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [],
+    "fileInfos": {},
+    "root": [],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {}
+  },
+  "version": "FakeTSVersion",
+  "size": 165
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/doesnt-infer-the-rootDir-from-source-paths.js b/tests/baselines/reference/tsc/projectReferencesConfig/doesnt-infer-the-rootDir-from-source-paths.js
new file mode 100644
index 0000000000000..dac29432d5d9a
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/doesnt-infer-the-rootDir-from-source-paths.js
@@ -0,0 +1,97 @@
+Input::
+//// [/alpha/src/a.ts]
+export const m: number = 3;
+
+//// [/alpha/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+
+
+Output::
+/lib/tsc --p /alpha/tsconfig.json
+exitCode:: ExitStatus.Success
+
+
+//// [/alpha/bin/src/a.d.ts]
+export declare const m: number;
+
+
+//// [/alpha/bin/src/a.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.m = void 0;
+exports.m = 3;
+
+
+//// [/alpha/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../src/a.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-12181672471-export const m: number = 3;","signature":"-6260611917-export declare const m: number;\n"}],"root":[2],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[2,1],"latestChangedDtsFile":"./src/a.d.ts"},"version":"FakeTSVersion"}
+
+//// [/alpha/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../src/a.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../src/a.ts": {
+        "original": {
+          "version": "-12181672471-export const m: number = 3;",
+          "signature": "-6260611917-export declare const m: number;\n"
+        },
+        "version": "-12181672471-export const m: number = 3;",
+        "signature": "-6260611917-export declare const m: number;\n"
+      }
+    },
+    "root": [
+      [
+        2,
+        "../src/a.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "semanticDiagnosticsPerFile": [
+      "../src/a.ts",
+      "../../lib/lib.d.ts"
+    ],
+    "latestChangedDtsFile": "./src/a.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 866
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-file-is-outside-the-rootdir.js b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-file-is-outside-the-rootdir.js
new file mode 100644
index 0000000000000..32027721c8c38
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-file-is-outside-the-rootdir.js
@@ -0,0 +1,139 @@
+Input::
+//// [/alpha/src/a.ts]
+import * as b from '../../beta/b'
+
+//// [/alpha/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+//// [/beta/b.ts]
+export { }
+
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+
+
+Output::
+/lib/tsc --p /alpha/tsconfig.json
+alpha/src/a.ts:1:20 - error TS6059: File '/beta/b.ts' is not under 'rootDir' '/alpha'. 'rootDir' is expected to contain all source files.
+
+1 import * as b from '../../beta/b'
+                     ~~~~~~~~~~~~~~
+
+alpha/src/a.ts:1:20 - error TS6307: File '/beta/b.ts' is not listed within the file list of project '/alpha/tsconfig.json'. Projects must list all files or use an 'include' pattern.
+
+1 import * as b from '../../beta/b'
+                     ~~~~~~~~~~~~~~
+
+
+Found 2 errors in the same file, starting at: alpha/src/a.ts:1
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/alpha/bin/src/a.d.ts]
+export {};
+
+
+//// [/alpha/bin/src/a.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/alpha/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../../beta/b.ts","../src/a.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-3360792065-export { }","signature":"-3531856636-export {};\n"},{"version":"-5654511483-import * as b from '../../beta/b'","signature":"-3531856636-export {};\n"}],"root":[3],"options":{"composite":true,"outDir":"./"},"fileIdsList":[[2]],"referencedMap":[[3,1]],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[3,2,1],"latestChangedDtsFile":"./src/a.d.ts"},"version":"FakeTSVersion"}
+
+//// [/alpha/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../../beta/b.ts",
+      "../src/a.ts"
+    ],
+    "fileNamesList": [
+      [
+        "../../beta/b.ts"
+      ]
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../../beta/b.ts": {
+        "original": {
+          "version": "-3360792065-export { }",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-3360792065-export { }",
+        "signature": "-3531856636-export {};\n"
+      },
+      "../src/a.ts": {
+        "original": {
+          "version": "-5654511483-import * as b from '../../beta/b'",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-5654511483-import * as b from '../../beta/b'",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        3,
+        "../src/a.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {
+      "../src/a.ts": [
+        "../../beta/b.ts"
+      ]
+    },
+    "exportedModulesMap": {},
+    "semanticDiagnosticsPerFile": [
+      "../src/a.ts",
+      "../../beta/b.ts",
+      "../../lib/lib.d.ts"
+    ],
+    "latestChangedDtsFile": "./src/a.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 971
+}
+
+//// [/beta/b.d.ts]
+export {};
+
+
+//// [/beta/b.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-prepended-project-reference-doesnt-set-outFile.js b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-prepended-project-reference-doesnt-set-outFile.js
new file mode 100644
index 0000000000000..ab4a988b13dfb
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-prepended-project-reference-doesnt-set-outFile.js
@@ -0,0 +1,122 @@
+Input::
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/primary/a.ts]
+export { };
+
+//// [/primary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [
+  {
+   "path": "../someProj",
+   "prepend": true
+  }
+ ]
+}
+
+//// [/someProj/b.ts]
+const x = 100;
+
+//// [/someProj/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+
+
+Output::
+/lib/tsc --p /primary/tsconfig.json --ignoreDeprecations 5.0
+primary/tsconfig.json:7:3 - error TS6308: Cannot prepend project '/someProj' because it does not have 'outFile' set
+
+ 7   {
+     ~
+ 8    "path": "../someProj",
+   ~~~~~~~~~~~~~~~~~~~~~~~~~
+ 9    "prepend": true
+   ~~~~~~~~~~~~~~~~~~
+10   }
+   ~~~
+
+
+Found 1 error in primary/tsconfig.json:7
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/primary/bin/a.d.ts]
+export {};
+
+
+//// [/primary/bin/a.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/primary/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../a.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-3531955686-export { };","signature":"-3531856636-export {};\n"}],"root":[2],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"latestChangedDtsFile":"./a.d.ts"},"version":"FakeTSVersion"}
+
+//// [/primary/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../a.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../a.ts": {
+        "original": {
+          "version": "-3531955686-export { };",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-3531955686-export { };",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        2,
+        "../a.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "latestChangedDtsFile": "./a.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 785
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-prepended-project-reference-output-doesnt-exist.js b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-prepended-project-reference-output-doesnt-exist.js
new file mode 100644
index 0000000000000..023ef4bfd92fc
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-a-prepended-project-reference-output-doesnt-exist.js
@@ -0,0 +1,139 @@
+Input::
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/primary/a.ts]
+const y = x;
+
+//// [/primary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [
+  {
+   "path": "../someProj",
+   "prepend": true
+  }
+ ]
+}
+
+//// [/someProj/b.ts]
+const x = 100;
+
+//// [/someProj/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin",
+  "outFile": "foo.js"
+ },
+ "references": []
+}
+
+
+
+Output::
+/lib/tsc --p /primary/tsconfig.json --ignoreDeprecations 5.0
+error TS6053: File '/someProj/foo.d.ts' not found.
+  The file is in the program because:
+    Output from referenced project '/someProj/tsconfig.json' included because '--module' is specified as 'none'
+
+  primary/tsconfig.json:7:3
+     7   {
+         ~
+     8    "path": "../someProj",
+       ~~~~~~~~~~~~~~~~~~~~~~~~~
+     9    "prepend": true
+       ~~~~~~~~~~~~~~~~~~
+    10   }
+       ~~~
+    File is output from referenced project specified here.
+
+primary/tsconfig.json:7:3 - error TS6309: Output file '/someProj/foo.js' from project '/someProj' does not exist
+
+ 7   {
+     ~
+ 8    "path": "../someProj",
+   ~~~~~~~~~~~~~~~~~~~~~~~~~
+ 9    "prepend": true
+   ~~~~~~~~~~~~~~~~~~
+10   }
+   ~~~
+
+
+Found 2 errors in the same file, starting at: primary/tsconfig.json:7
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/primary/bin/a.d.ts]
+declare const y: any;
+
+
+//// [/primary/bin/a.js]
+var y = x;
+
+
+//// [/primary/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../a.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"4096062741-const y = x;","signature":"-1874842468-declare const y: any;\n","affectsGlobalScope":true}],"root":[2],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"latestChangedDtsFile":"./a.d.ts"},"version":"FakeTSVersion"}
+
+//// [/primary/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../a.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../a.ts": {
+        "original": {
+          "version": "4096062741-const y = x;",
+          "signature": "-1874842468-declare const y: any;\n",
+          "affectsGlobalScope": true
+        },
+        "version": "4096062741-const y = x;",
+        "signature": "-1874842468-declare const y: any;\n",
+        "affectsGlobalScope": true
+      }
+    },
+    "root": [
+      [
+        2,
+        "../a.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "latestChangedDtsFile": "./a.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 822
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-declaration-=-false.js b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-declaration-=-false.js
new file mode 100644
index 0000000000000..01ebab507ac1d
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-declaration-=-false.js
@@ -0,0 +1,101 @@
+Input::
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/primary/a.ts]
+export { };
+
+//// [/primary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin",
+  "declaration": false
+ },
+ "references": []
+}
+
+
+
+Output::
+/lib/tsc --p /primary/tsconfig.json
+primary/tsconfig.json:5:3 - error TS6304: Composite projects may not disable declaration emit.
+
+5   "declaration": false
+    ~~~~~~~~~~~~~
+
+
+Found 1 error in primary/tsconfig.json:5
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/primary/bin/a.d.ts]
+export {};
+
+
+//// [/primary/bin/a.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/primary/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../a.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-3531955686-export { };","signature":"-3531856636-export {};\n"}],"root":[2],"options":{"composite":true,"declaration":false,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"latestChangedDtsFile":"./a.d.ts"},"version":"FakeTSVersion"}
+
+//// [/primary/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../a.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../a.ts": {
+        "original": {
+          "version": "-3531955686-export { };",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-3531955686-export { };",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        2,
+        "../a.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "declaration": false,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "latestChangedDtsFile": "./a.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 805
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-file-list-is-not-exhaustive.js b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-file-list-is-not-exhaustive.js
new file mode 100644
index 0000000000000..3f601b9987ea7
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-file-list-is-not-exhaustive.js
@@ -0,0 +1,137 @@
+Input::
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/primary/a.ts]
+import * as b from './b'
+
+//// [/primary/b.ts]
+export {}
+
+//// [/primary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [],
+ "files": [
+  "a.ts"
+ ]
+}
+
+
+
+Output::
+/lib/tsc --p /primary/tsconfig.json
+primary/a.ts:1:20 - error TS6307: File '/primary/b.ts' is not listed within the file list of project '/primary/tsconfig.json'. Projects must list all files or use an 'include' pattern.
+
+1 import * as b from './b'
+                     ~~~~~
+
+
+Found 1 error in primary/a.ts:1
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/primary/bin/a.d.ts]
+export {};
+
+
+//// [/primary/bin/a.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/primary/bin/b.d.ts]
+export {};
+
+
+//// [/primary/bin/b.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/primary/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../b.ts","../a.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-2704852577-export {}","signature":"-3531856636-export {};\n"},{"version":"-4190788607-import * as b from './b'","signature":"-3531856636-export {};\n"}],"root":[3],"options":{"composite":true,"outDir":"./"},"fileIdsList":[[2]],"referencedMap":[[3,1]],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[1,3,2],"latestChangedDtsFile":"./a.d.ts"},"version":"FakeTSVersion"}
+
+//// [/primary/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../b.ts",
+      "../a.ts"
+    ],
+    "fileNamesList": [
+      [
+        "../b.ts"
+      ]
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../b.ts": {
+        "original": {
+          "version": "-2704852577-export {}",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-2704852577-export {}",
+        "signature": "-3531856636-export {};\n"
+      },
+      "../a.ts": {
+        "original": {
+          "version": "-4190788607-import * as b from './b'",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-4190788607-import * as b from './b'",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        3,
+        "../a.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {
+      "../a.ts": [
+        "../b.ts"
+      ]
+    },
+    "exportedModulesMap": {},
+    "semanticDiagnosticsPerFile": [
+      "../../lib/lib.d.ts",
+      "../a.ts",
+      "../b.ts"
+    ],
+    "latestChangedDtsFile": "./a.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 945
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-referenced-project-doesnt-exist.js b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-referenced-project-doesnt-exist.js
new file mode 100644
index 0000000000000..101c82a67c773
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-referenced-project-doesnt-exist.js
@@ -0,0 +1,107 @@
+Input::
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/primary/a.ts]
+export { };
+
+//// [/primary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [
+  {
+   "path": "../foo"
+  }
+ ]
+}
+
+
+
+Output::
+/lib/tsc --p /primary/tsconfig.json
+primary/tsconfig.json:7:3 - error TS6053: File '/foo' not found.
+
+7   {
+    ~
+8    "path": "../foo"
+  ~~~~~~~~~~~~~~~~~~~
+9   }
+  ~~~
+
+
+Found 1 error in primary/tsconfig.json:7
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/primary/bin/a.d.ts]
+export {};
+
+
+//// [/primary/bin/a.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/primary/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../a.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-3531955686-export { };","signature":"-3531856636-export {};\n"}],"root":[2],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"latestChangedDtsFile":"./a.d.ts"},"version":"FakeTSVersion"}
+
+//// [/primary/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../a.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../a.ts": {
+        "original": {
+          "version": "-3531955686-export { };",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-3531955686-export { };",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        2,
+        "../a.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "latestChangedDtsFile": "./a.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 785
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-referenced-project-doesnt-have-composite.js b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-referenced-project-doesnt-have-composite.js
new file mode 100644
index 0000000000000..596e2f9278a1f
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/errors-when-the-referenced-project-doesnt-have-composite.js
@@ -0,0 +1,122 @@
+Input::
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/primary/a.ts]
+export { };
+
+//// [/primary/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": false,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+//// [/reference/b.ts]
+import * as mod_0 from "../primary/a"
+
+//// [/reference/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [
+  {
+   "path": "../primary"
+  }
+ ],
+ "files": [
+  "b.ts"
+ ]
+}
+
+
+
+Output::
+/lib/tsc --p /reference/tsconfig.json
+reference/tsconfig.json:7:3 - error TS6306: Referenced project '/primary' must have setting "composite": true.
+
+7   {
+    ~
+8    "path": "../primary"
+  ~~~~~~~~~~~~~~~~~~~~~~~
+9   }
+  ~~~
+
+
+Found 1 error in reference/tsconfig.json:7
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/reference/bin/b.d.ts]
+export {};
+
+
+//// [/reference/bin/b.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/reference/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../b.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-9543969340-import * as mod_0 from \"../primary/a\"","signature":"-3531856636-export {};\n"}],"root":[2],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"latestChangedDtsFile":"./b.d.ts"},"version":"FakeTSVersion"}
+
+//// [/reference/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../b.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../b.ts": {
+        "original": {
+          "version": "-9543969340-import * as mod_0 from \"../primary/a\"",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-9543969340-import * as mod_0 from \"../primary/a\"",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        2,
+        "../b.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "latestChangedDtsFile": "./b.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 813
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/issues-a-nice-error-when-the-input-file-is-missing-when-module-reference-is-not-relative.js b/tests/baselines/reference/tsc/projectReferencesConfig/issues-a-nice-error-when-the-input-file-is-missing-when-module-reference-is-not-relative.js
new file mode 100644
index 0000000000000..c041e1c2bd16f
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/issues-a-nice-error-when-the-input-file-is-missing-when-module-reference-is-not-relative.js
@@ -0,0 +1,137 @@
+Input::
+//// [/alpha/a.ts]
+export const m: number = 3;
+
+//// [/alpha/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+//// [/beta/b.ts]
+import { m } from '@alpha/a'
+
+//// [/beta/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin",
+  "baseUrl": "./",
+  "paths": {
+   "@alpha/*": [
+    "/alpha/*"
+   ]
+  }
+ },
+ "references": [
+  {
+   "path": "../alpha"
+  }
+ ]
+}
+
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+
+
+Output::
+/lib/tsc --p /beta/tsconfig.json
+beta/b.ts:1:19 - error TS6305: Output file '/alpha/bin/a.d.ts' has not been built from source file '/alpha/a.ts'.
+
+1 import { m } from '@alpha/a'
+                    ~~~~~~~~~~
+
+
+Found 1 error in beta/b.ts:1
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/beta/bin/b.d.ts]
+export {};
+
+
+//// [/beta/bin/b.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/beta/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../b.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"2892088637-import { m } from '@alpha/a'","signature":"-3531856636-export {};\n"}],"root":[2],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[[2,[{"file":"../b.ts","start":18,"length":10,"messageText":"Output file '/alpha/bin/a.d.ts' has not been built from source file '/alpha/a.ts'.","category":1,"code":6305}]],1],"latestChangedDtsFile":"./b.d.ts"},"version":"FakeTSVersion"}
+
+//// [/beta/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../b.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../b.ts": {
+        "original": {
+          "version": "2892088637-import { m } from '@alpha/a'",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "2892088637-import { m } from '@alpha/a'",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        2,
+        "../b.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "semanticDiagnosticsPerFile": [
+      [
+        "../b.ts",
+        [
+          {
+            "file": "../b.ts",
+            "start": 18,
+            "length": 10,
+            "messageText": "Output file '/alpha/bin/a.d.ts' has not been built from source file '/alpha/a.ts'.",
+            "category": 1,
+            "code": 6305
+          }
+        ]
+      ],
+      "../../lib/lib.d.ts"
+    ],
+    "latestChangedDtsFile": "./b.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 1006
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/issues-a-nice-error-when-the-input-file-is-missing.js b/tests/baselines/reference/tsc/projectReferencesConfig/issues-a-nice-error-when-the-input-file-is-missing.js
new file mode 100644
index 0000000000000..0a41fbe611f7b
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/issues-a-nice-error-when-the-input-file-is-missing.js
@@ -0,0 +1,131 @@
+Input::
+//// [/alpha/a.ts]
+export const m: number = 3;
+
+//// [/alpha/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+//// [/beta/b.ts]
+import { m } from '../alpha/a'
+
+//// [/beta/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [
+  {
+   "path": "../alpha"
+  }
+ ]
+}
+
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+
+
+Output::
+/lib/tsc --p /beta/tsconfig.json
+beta/b.ts:1:19 - error TS6305: Output file '/alpha/bin/a.d.ts' has not been built from source file '/alpha/a.ts'.
+
+1 import { m } from '../alpha/a'
+                    ~~~~~~~~~~~~
+
+
+Found 1 error in beta/b.ts:1
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/beta/bin/b.d.ts]
+export {};
+
+
+//// [/beta/bin/b.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/beta/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../b.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},{"version":"-4853599800-import { m } from '../alpha/a'","signature":"-3531856636-export {};\n"}],"root":[2],"options":{"composite":true,"outDir":"./"},"referencedMap":[],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[[2,[{"file":"../b.ts","start":18,"length":12,"messageText":"Output file '/alpha/bin/a.d.ts' has not been built from source file '/alpha/a.ts'.","category":1,"code":6305}]],1],"latestChangedDtsFile":"./b.d.ts"},"version":"FakeTSVersion"}
+
+//// [/beta/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../b.ts"
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../b.ts": {
+        "original": {
+          "version": "-4853599800-import { m } from '../alpha/a'",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-4853599800-import { m } from '../alpha/a'",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        2,
+        "../b.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "semanticDiagnosticsPerFile": [
+      [
+        "../b.ts",
+        [
+          {
+            "file": "../b.ts",
+            "start": 18,
+            "length": 12,
+            "messageText": "Output file '/alpha/bin/a.d.ts' has not been built from source file '/alpha/a.ts'.",
+            "category": 1,
+            "code": 6305
+          }
+        ]
+      ],
+      "../../lib/lib.d.ts"
+    ],
+    "latestChangedDtsFile": "./b.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 1009
+}
+
diff --git a/tests/baselines/reference/tsc/projectReferencesConfig/redirects-to-the-output-dts-file.js b/tests/baselines/reference/tsc/projectReferencesConfig/redirects-to-the-output-dts-file.js
new file mode 100644
index 0000000000000..238f144190afe
--- /dev/null
+++ b/tests/baselines/reference/tsc/projectReferencesConfig/redirects-to-the-output-dts-file.js
@@ -0,0 +1,156 @@
+Input::
+//// [/alpha/a.ts]
+export const m: number = 3;
+
+//// [/alpha/bin/a.d.ts]
+export { };
+
+//// [/alpha/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": []
+}
+
+//// [/beta/b.ts]
+import { m } from '../alpha/a'
+
+//// [/beta/tsconfig.json]
+{
+ "compilerOptions": {
+  "composite": true,
+  "outDir": "bin"
+ },
+ "references": [
+  {
+   "path": "../alpha"
+  }
+ ]
+}
+
+//// [/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+
+
+Output::
+/lib/tsc --p /beta/tsconfig.json --explainFiles
+beta/b.ts:1:10 - error TS2305: Module '"../alpha/a"' has no exported member 'm'.
+
+1 import { m } from '../alpha/a'
+           ~
+
+lib/lib.d.ts
+  Default library for target 'es5'
+alpha/bin/a.d.ts
+  Imported via '../alpha/a' from file 'beta/b.ts'
+  File is output of project reference source 'alpha/a.ts'
+beta/b.ts
+  Matched by default include pattern '**/*'
+
+Found 1 error in beta/b.ts:1
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+
+//// [/beta/bin/b.d.ts]
+export {};
+
+
+//// [/beta/bin/b.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+
+
+//// [/beta/bin/tsconfig.tsbuildinfo]
+{"program":{"fileNames":["../../lib/lib.d.ts","../../alpha/bin/a.d.ts","../b.ts"],"fileInfos":[{"version":"3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true},"-3531955686-export { };",{"version":"-4853599800-import { m } from '../alpha/a'","signature":"-3531856636-export {};\n"}],"root":[3],"options":{"composite":true,"outDir":"./"},"fileIdsList":[[2]],"referencedMap":[[3,1]],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[2,[3,[{"file":"../b.ts","start":9,"length":1,"messageText":"Module '\"../alpha/a\"' has no exported member 'm'.","category":1,"code":2305}]],1],"latestChangedDtsFile":"./b.d.ts"},"version":"FakeTSVersion"}
+
+//// [/beta/bin/tsconfig.tsbuildinfo.readable.baseline.txt]
+{
+  "program": {
+    "fileNames": [
+      "../../lib/lib.d.ts",
+      "../../alpha/bin/a.d.ts",
+      "../b.ts"
+    ],
+    "fileNamesList": [
+      [
+        "../../alpha/bin/a.d.ts"
+      ]
+    ],
+    "fileInfos": {
+      "../../lib/lib.d.ts": {
+        "original": {
+          "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+          "affectsGlobalScope": true
+        },
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "../../alpha/bin/a.d.ts": {
+        "version": "-3531955686-export { };",
+        "signature": "-3531955686-export { };"
+      },
+      "../b.ts": {
+        "original": {
+          "version": "-4853599800-import { m } from '../alpha/a'",
+          "signature": "-3531856636-export {};\n"
+        },
+        "version": "-4853599800-import { m } from '../alpha/a'",
+        "signature": "-3531856636-export {};\n"
+      }
+    },
+    "root": [
+      [
+        3,
+        "../b.ts"
+      ]
+    ],
+    "options": {
+      "composite": true,
+      "outDir": "./"
+    },
+    "referencedMap": {
+      "../b.ts": [
+        "../../alpha/bin/a.d.ts"
+      ]
+    },
+    "exportedModulesMap": {},
+    "semanticDiagnosticsPerFile": [
+      "../../alpha/bin/a.d.ts",
+      [
+        "../b.ts",
+        [
+          {
+            "file": "../b.ts",
+            "start": 9,
+            "length": 1,
+            "messageText": "Module '\"../alpha/a\"' has no exported member 'm'.",
+            "category": 1,
+            "code": 2305
+          }
+        ]
+      ],
+      "../../lib/lib.d.ts"
+    ],
+    "latestChangedDtsFile": "./b.d.ts"
+  },
+  "version": "FakeTSVersion",
+  "size": 1054
+}
+