pytest-dev / pytest-dev/pytest-xdist

Unable to get custom parameters passed in from the command line

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Description

pytest-xdist unable to get custom parameters passed in from the command line.
Can you give an example?
Thank you!

def pytest_addoption(parser):
    parser.addoption(
        "--cmd", action="store", default="fat", help="Abbreviation of tested environment"
    )


@pytest.fixture(scope="session", autouse=True)
def cmd(request):
    return request.config.workerinput["mainargv"]

IndexError: list index out of range

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Research direction

Start with the pytest_addoption definition and the session-scoped cmd fixture shown in the issue, then reproduce the IndexError while running pytest-xdist with a custom --cmd argument. Done means the custom command-line value can be retrieved reliably under xdist, with an example that explains the supported access pattern.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
testing-qa
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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