[faceofcat]

What this is

The last PR of the machine module stack, after #81, #82 and #83. It finishes the move to JUnit that #82 started, and only touches tests, build scripts and docs. Nothing under src/main changes.

The 16 remaining src/builderTest programs (17 classes with GuiProtocolTest) move to src/test and run under ./gradlew test. One run now reports every failing check, instead of stopping at the first failed task.

• Each main becomes a @Test method. BlockEntitiesTest.standaloneMachine and GuiProtocolTest (called from ScreenLoaderTest) become tests of their own. The check bodies are unchanged apart from dropping the "passed" prints.
• The builderTest source set and its 16 verify* JavaExec tasks are gone. The test task sets mmdlib.resources and mmdlib.generated for VanillaExamplesTest and RuntimeBehaviorTest.
• Docs that named the old tasks now name the test classes, and the CI comment and build.gradle no longer mention them.

Review notes

• One commit, rebased onto the merged Machine recipe types: datapack loading, lookup, datagen and JEI #83. Most of the diff is file renames, so "hide whitespace" and the renames view should make it quick.
• These are still long tests. Most of these classes are one @Test that stops at its first failed check, because I moved them as they were. Failures across classes are all reported now, but a class still stops at its first. I'd split them up when they next change, rather than in this PR.
• They now share one JVM, where each used to get its own. See the random-order run below.
• build still doesn't run any of this, as on Test infrastructure: JUnit 5, game tests and CI #82. It's all on ./gradlew check.

Testing

• ./gradlew check passes locally: 70 unit tests with no failures, and all 18 game tests.
• The unit tests also pass with classes and methods in four random orders, each starting from a different class, so they don't depend on running order or on each other's state.
• check got a little faster, because 16 forked JVMs became one: 1m 7s down to 52s, and 55 tasks down to 38. That's one local --rerun-tasks run each, so treat it as a rough figure.
• I didn't run the GUI smoke test locally. It's unaffected by this change, and the CI job on this PR covers it.

🤖 Generated with Claude Code

https://claude.ai/code/session_018zpP6ZrFjaGe477FvWAZKo