Deprecate aiohttp.pytest_plugin

[Dreamsorcerer]

Add deprecation warning in 3.12.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
1	1	0	0

View the top 1 failed test(s) by shortest run time

pytest internal

Stack Traces | 0s run time

Traceback (most recent call last):
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9....../site-packages/_pytest/main.py", line 283, in wrap_session
    session.exitstatus = doit(config, session) or 0
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9....../site-packages/_pytest/main.py", line 336, in _main
    config.hook.pytest_collection(session=session)
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9.../site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9.../site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9............/site-packages/pluggy/_callers.py", line 139, in _multicall
    raise exception.with_traceback(exception.__traceback__)
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9............/site-packages/pluggy/_callers.py", line 122, in _multicall
    teardown.throw(exception)  # type: ignore[union-attr]
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9.../site-packages/_pytest/logging.py", line 790, in pytest_collection
    return (yield)
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9............/site-packages/pluggy/_callers.py", line 122, in _multicall
    teardown.throw(exception)  # type: ignore[union-attr]
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9.../site-packages/_pytest/warnings.py", line 121, in pytest_collection
    return (yield)
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9............/site-packages/pluggy/_callers.py", line 124, in _multicall
    teardown.send(result)  # type: ignore[union-attr]
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9.../_pytest/config/__init__.py", line 1419, in pytest_collection
    self._validate_config_options()
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9.../_pytest/config/__init__.py", line 1441, in _validate_config_options
    self._warn_or_fail_if_strict(f"Unknown config option: {key}\n")
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9.../_pytest/config/__init__.py", line 1480, in _warn_or_fail_if_strict
    self.issue_config_time_warning(PytestConfigWarning(message), stacklevel=3)
  File ".../hostedtoolcache/Python/3.9.22........................................../x64/lib/python3.9.../_pytest/config/__init__.py", line 1532, in issue_config_time_warning
    warnings.warn(warning, stacklevel=stacklevel)
pytest.PytestConfigWarning: Unknown config option: asyncio_mode

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[webknjaz]

Should this have a stacklevel=999?

[Dreamsorcerer]

That would just remove the stack trace, right? I wasn't sure the best approach, given the user's code will not be in the stack trace.

[webknjaz]

Yeah, it would point to this plugin module as the source, which is probably not the best thing to see. Also note that deprecation warnings aren't displayed by default (which is why some projects go for UserWarning instead). The end-users would need to have filterwarnings = error set in their pytest.ini to be able to see this — it may end up going unnoticed until they actually hit the removed thing. So I'm a bit turn here as (Future/Pending)DeprecationWarning is semantically more accurate but puts us at risk of not notifying enough end-users.

[Dreamsorcerer]

I'm not too worried as users should probably expect to make some changes when upgrading to v4. If they only notice at that point, that's fine.