Function pytest_fixture_setup

src/_pytest/fixtures.py:1305–1338

Execution of fixture setup.

(
    fixturedef: FixtureDef[FixtureValue], request: SubRequest
)

def pytest_fixture_setup(
    fixturedef: FixtureDef[FixtureValue], request: SubRequest
) -> FixtureValue:
    """Execution of fixture setup."""
    kwargs = {}
    for argname in fixturedef.argnames:
        kwargs[argname] = request.getfixturevalue(argname)

    fixturefunc = resolve_fixture_function(fixturedef, request)
    my_cache_key = fixturedef.cache_key(request)

    if inspect.isasyncgenfunction(fixturefunc) or inspect.iscoroutinefunction(
        fixturefunc
    ):
        auto_str = " with autouse=True" if fixturedef._autouse else ""
        fail(
            f"{request.node.name!r} requested an async fixture {request.fixturename!r}{auto_str}, "
            "with no plugin or hook that handled it. This is an error, as pytest does not natively support it.\n"
            "See: https://docs.pytest.org/en/stable/deprecations.html#sync-test-depending-on-async-fixture",
            pytrace=False,
        )

    try:
        result = call_fixture_func(fixturefunc, request, kwargs)
    except TEST_OUTCOME as e:
        if isinstance(e, skip.Exception):
            # The test requested a fixture which caused a skip.
            # Don't show the fixture as the skip location, as then the user
            # wouldn't know which test skipped.
            e._use_item_location = True
        fixturedef.cached_result = (None, my_cache_key, (e, e.__traceback__))
        raise
    fixturedef.cached_result = (result, my_cache_key, None)
    return result


@final