How to make sure debugpy is used for debugging tests?

Brett Cannon (@brettcannon)

Brett Cannon (@brettcannon) said in microsoft/vscode-python#21748 (comment) that pressing the “debug test” button in the Python extension’s test view should use this extension if available.

I tried to set the justMyCode setting to true without a launch configuration to check it out. My breakpoint in library code wasn’t respected. That makes me think that either the Python extension used its own debugger or the justMyCode setting doesn’t work reliably.

Is there a way to configure or even see which debugger extension provides the functionality to see which one it is?

Workaround for microsoft/vscode-python-debugger#112

I have found a workaround for now, shown in .vscode/launch.json below, as seen in referenced commit from my project template.

Also, here's some possibly useful information for debugging this issue. When I introduce the pytest debug configuration below, of type python (as opposed to debugpy), with purpose debug-test and justMyCode disabled, I can debug inside of third-party code when running test suites through the test adapter (I'm using the preview test adapter).

If I don't have that pytest debug configuration present, or configured exactly as described above, I can't step into third-party code then running via test adapter. I've also tried setting debug-test purpose in the Python: Current file adapter (driven by debugpy), explicitly toggling justMyCode in that, using the debugpy.debugJustMyCode setting, and combinations of all that.

I haven't tried all of that over again while explicitly opting out of the new test adapter, however.

Workaround: `.vscode/launch.json`

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Python: Current file",
      "type": "debugpy",
      "request": "launch",
      "program": "${file}",
      "console": "internalConsole"
    },
    ...
    {
      "name": "pytest",
      "purpose": ["debug-test"],
      "presentation": {
        "hidden": true
      },
      "type": "python",
      "request": "launch",
      "program": "${file}",
      "console": "internalConsole",
      "justMyCode": false
    }
  ]
}

Paula (@paulacamargo25)

Paula (@paulacamargo25), do you have any thoughts on this and if the workaround is required?

I know it's just my machine, but I tried again with the latest extension version: debugging tests specifically setting the debugpy adapter with the debug-test purpose again, and with the workaround removed altogether (debugpy.debugJustMyCode set to false). It looks like for my machine that the described workaround is still required. Below are system version details from when I tried this again today. Let me know if it would help to try this with minimal extensions enabled or with extension bisect or something like that, or whether you are able to repro on your end. Thanks!

Python Debugger extension version: v2023.3.13271006
Version: 1.84.2 (user setup)
Commit: 1a5daa3a0231a0fbba4f14db7ec463cf99d7768e
Date: 2023-11-09T10:51:52.184Z
Electron: 25.9.2
ElectronBuildId: 24603566
Chromium: 114.0.5735.289
Node.js: 18.15.0
V8: 11.4.183.29-electron.0
OS: Windows_NT x64 10.0.19045

I know it's just my machine

It's not, I have the same issue. Your workaround helps a lot. Happy to help investigate/debug this if anyone has specific instructions.

Since testing is handled on the python extension side, a change needs to be made to start using the python debugger extension.

This issue was already solved in insiders, could you try testing again with the last pre-release version on the python extension?

closed in : #174

Paula (@paulacamargo25)

Paula (@paulacamargo25) do you have verification steps for this?

This is working for me in Python Debugger v2024.2.0. Thanks!

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How to make sure debugpy is used for debugging tests? #112

Workaround: `.vscode/launch.json`

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How to make sure debugpy is used for debugging tests? #112

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blakeNaccarato commented on Nov 17, 2023

Workaround: .vscode/launch.json

eleanorjboyd commented on Nov 27, 2023

blakeNaccarato commented on Nov 28, 2023

bersbersbers commented on Dec 10, 2023

paulacamargo25 commented on Jan 29, 2024

paulacamargo25 commented on Feb 14, 2024

paulacamargo25 commented on Feb 15, 2024

andreamah commented on Feb 22, 2024

bersbersbers commented on Feb 29, 2024

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Workaround: `.vscode/launch.json`