pytests: update fixtures to not use deprecated event_loop

[tomasmatus]

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• [x] https://github.com/cockpit-project/cockpit/pull/22135

pytest_asyncio dropped event_loop fixture in version 1.0.0

[tomasmatus]

let's see what happens :)

[tomasmatus]

python 3.6 does not seem to like this

[tomasmatus]

@jelly so I managed to get tox green. Can't say I am confident with this. Please take a look :)

[tomasmatus]

from journal

Jun 04 14:34:24 fedora-42-127-0-0-2-2201 cockpit-session[2356]: Traceback (most recent call last):
Jun 04 14:34:24 fedora-42-127-0-0-2-2201 cockpit-session[2356]:   File "/usr/sbin/cockpit-bridge", line 5, in <module>
Jun 04 14:34:24 fedora-42-127-0-0-2-2201 cockpit-session[2356]:     from cockpit.bridge import main
Jun 04 14:34:24 fedora-42-127-0-0-2-2201 cockpit-session[2356]:   File "/usr/lib/python3.13/site-packages/cockpit/bridge.py", line 35, in <module>
Jun 04 14:34:24 fedora-42-127-0-0-2-2201 cockpit-session[2356]:     from . import polyfills
Jun 04 14:34:24 fedora-42-127-0-0-2-2201 cockpit-session[2356]:   File "/usr/lib/python3.13/site-packages/cockpit/polyfills.py", line 21, in <module>
Jun 04 14:34:24 fedora-42-127-0-0-2-2201 cockpit-session[2356]:     import pytest_asyncio
Jun 04 14:34:24 fedora-42-127-0-0-2-2201 cockpit-session[2356]: ModuleNotFoundError: No module named 'pytest_asyncio'

that's me being silly and bridge definitely should not depend on pytest_asyncio

[tomasmatus]

hmm so vulture still complains about _check_settled being unused

 FAIL: test/common/static-code
=============================

not ok 12 /static-code/test-vulture
# test/pytest/conftest.py:83: unused function '_check_settled' (60% confidence)
FAIL test/common/static-code (exit status: 1)

but with print(...) inside of it I can tell that it runs on every test 🤔 eg:

test/pytest/test_transport.py::TestSubprocessTransport::test_write_backlog_eof_and_close 

_CHECK_SETTLED_YIELD
PASSED

_CHECK_SETTLED_END