add pytest reruns plugin pytest-rerunfailures and minimal settings

[valeriupredoi]

Description

Contributes to avoiding #140 and makes #141 work, as @kmuehlbauer astutely pointed out

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.66%. Comparing base (a2fa21b) to head (07f5f57).
⚠️ Report is 169 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #142   +/-   ##
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  Coverage   74.66%   74.66%           
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  Files          12       12           
  Lines        2712     2712           
  Branches      407      407           
=======================================
  Hits         2025     2025           
  Misses        576      576           
  Partials      111      111           

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[valeriupredoi]

@kmuehlbauer shall we get this one in, mate? Though I'm not seeing any flakes in the nightly tests at all - better safe than sorry though 🍺

[kmuehlbauer]

@valeriupredoi Yes! Let me do one final check locally. Hang on a minute.

[valeriupredoi]

take yer time, no rush at all 🍺

[kmuehlbauer]

OK, so the current setup with --reruns=3 will rerun any test case which fails, marked or not.

According to my observation, this will only rerun tests once if tests are marked with @pytest.mark.flaky.

So we could remove --reruns=3 to directly catch flaky test and mark each flaky tests like @pytest.mark.flaky(reruns=3, only_rerun="ValueError").

Update: Because ValueError is the error which is raised in the flaky case.

[valeriupredoi]

(reruns=3, only_rerun="ValueError")

sounds like a good plan! See e82ec3c and 07f5f57 - I reckon that's the only flaky test we ever have, so just rerun that one, though am still quite puzzled why I'm not seeing any fails in the nightly tests (just in PRs)

[kmuehlbauer]

Let's see how this works!

[valeriupredoi]

cheers muchly, Kai! 🍺