test_database_listener_directory_explicit fails

[dutyrok]

Hypothesis version

6.127.1

About

This test (tests/watchdog/test_database.py::test_database_listener_directory_explicit) fails in ALTLinux Sisyphus periodically. I occur the following assert error:

FAILED tests/watchdog/test_database.py::test_database_listener_directory_explicit - AssertionError: [('save', (b'k2', b'v3')), ('delete', (b'k1', None)), ('save', (b'k1', b'v3')), ('delete', (b'k2', None))]
assert [('save', (b'k2', b'v3')), ('delete', (b'k1', None)), ('save', (b'k1', b'v3')), ('delete', (b'k2', None))] == [('save', (b'k2', b'v3')), ('delete', (b'k1', b'v3')), ('save', (b'k2', b'v3')), ('save', (b'k1', b'v3')), ('delete', (b'k2', None))]
  
  At index 1 diff: ('delete', (b'k1', None)) != ('delete', (b'k1', b'v3'))
  Right contains one more item: ('delete', (b'k2', None))

Full diff.

  Full diff:
    [
        (
            'save',
            (
                b'k2',
                b'v3',
            ),
        ),
        (
            'delete',
            (
                b'k1',
  +             None,
  -             b'v3',
  -         ),
  -     ),
  -     (
  -         'save',
  -         (
  -             b'k2',
  -             b'v3',
            ),
        ),
        (
            'save',
            (
                b'k1',
                b'v3',
            ),
        ),
        (
            'delete',
            (
                b'k2',
                None,
            ),
        ),
    ]
   

Steps to reproduce

1. docker run -it --rm alt:sisyphus. The following commands will be executed within docker container.
2. apt-get update && apt-get dist-upgrade -y
3. apt-get install -y python3-base git python3-module-pytest python3-module-sortedcontainers python3-module-attrs python3-module-watchdog
4. cd && git clone https://github.com/HypothesisWorks/hypothesis.git && cd hypothesis/hypothesis-python/
5. PYTHONPATH="$(realpath src)" python3 -m pytest tests/watchdog/test_database.py::test_database_listener_directory_explicit -vv

Advance thanks for your help!

[tybug]

Thanks for the report! We've also seen this failure in our tests. It's a real failure, but is relatively benign and is not indicative of a serious underlying problem. I've marked it as xfail for now in #4270 in the interest of not leaving failing tests around until we can properly fix it.