Function test_fallback_emits_warning

tests/test_unix_fallback.py:25–31

(tmp_path: Path, mocker: MockerFixture)

@unix_only
def test_fallback_emits_warning(tmp_path: Path, mocker: MockerFixture) -> None:
    mocker.patch(_FLOCK_PATCH_TARGET, side_effect=_ENOSYS_SIDE_EFFECT)
    lock = UnixFileLock(tmp_path / "test.lock")

    with pytest.warns(UserWarning, match="flock not supported on this filesystem, falling back to SoftFileLock"):
        lock.acquire()
    lock.release()


@unix_only