How do I set verbosity_assertions with config.addinivalue_line?

[iliakur]

Contents of conftest.py

def pytest_configure(config):
    ...
    config.addinivalue_line("verbosity_assertions", "2")

I get an error:

INTERNALERROR> Traceback (most recent call last):
INTERNALERROR>   File "/Users/ilia.kurenkov/Library/Caches/pypoetry/virtualenvs/flaredex-qcBd715U-py3.8/lib/python3.8/site-packages/_pytest/main.py", line 281, in wrap_session
INTERNALERROR>     config._do_configure()
INTERNALERROR>   File "/Users/ilia.kurenkov/Library/Caches/pypoetry/virtualenvs/flaredex-qcBd715U-py3.8/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1121, in _do_configure
INTERNALERROR>     self.hook.pytest_configure.call_historic(kwargs=dict(config=self))
INTERNALERROR>   File "/Users/ilia.kurenkov/Library/Caches/pypoetry/virtualenvs/flaredex-qcBd715U-py3.8/lib/python3.8/site-packages/pluggy/_hooks.py", line 523, in call_historic
INTERNALERROR>     res = self._hookexec(self.name, self._hookimpls.copy(), kwargs, False)
INTERNALERROR>   File "/Users/ilia.kurenkov/Library/Caches/pypoetry/virtualenvs/flaredex-qcBd715U-py3.8/lib/python3.8/site-packages/pluggy/_manager.py", line 119, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
INTERNALERROR>   File "/Users/ilia.kurenkov/Library/Caches/pypoetry/virtualenvs/flaredex-qcBd715U-py3.8/lib/python3.8/site-packages/pluggy/_callers.py", line 138, in _multicall
INTERNALERROR>     raise exception.with_traceback(exception.__traceback__)
INTERNALERROR>   File "/Users/ilia.kurenkov/Library/Caches/pypoetry/virtualenvs/flaredex-qcBd715U-py3.8/lib/python3.8/site-packages/pluggy/_callers.py", line 102, in _multicall
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/Users/ilia.kurenkov/go/src/github.com/DataDog/flaredex/tests/conftest.py", line 110, in pytest_configure
INTERNALERROR>     config.addinivalue_line("verbosity_assertions", '2')
INTERNALERROR>   File "/Users/ilia.kurenkov/Library/Caches/pypoetry/virtualenvs/flaredex-qcBd715U-py3.8/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1549, in addinivalue_line
INTERNALERROR>     assert isinstance(x, list)
INTERNALERROR> AssertionError

I looked at the implementation and it looks like something's not right with the return value of config.getini. I confirmed that it returns "auto" by default, which is not a list.

So it seems like my hands are tied and this may be a bug, but I'd like to post here in case I'm missing something obvious.

The examples in the docs all use pytest.ini files and when I tried that it seemed to work.

[RonnyPfannschmidt]

i believe we have a regression due to https://github.com/pytest-dev/pytest/pull/11594/files - a bugfix in pytest is needed

[RonnyPfannschmidt]

it seems we currently have no way to override this - cc @nicoddemus

[iliakur]

@RonnyPfannschmidt I'll mark your post as an answer, thanks for the response!

lmk if there's anything I can do to help. Not sure I have enough context to fix the bug, but I could do bureaucratic things like opening a bug issue and stuff.