pytest-dev / pytest-dev/pytest-xdist

Question: Is it expected, that the tests run in the main thread?

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Description

I have some code that registers signals, basically starting it's own thread.

This needs to be in the main thread, since signals only work there. Once every, maybe, 30 executions in my CI an assert triggers, that my code (and thereby the test) was not executed on the main thread.

Is there a way to reliably make that happen? How come this is so rare? Could the CI and maybe hyperthreading have something to do with it?

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Research direction

The issue names no source file, test, or entry point. Start by reproducing the intermittent main-thread assertion in CI, then compare runs with different execution frequencies and hyperthreading settings; done means establishing whether reliable main-thread execution is supported and documenting the result.

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Assessment

Tech stack
python
Domain
testing-qa
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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