New release of pytest-asyncio causes tests to fail

[evalott100]

Tests fail when awaiting aioca coroutines:

Traceback (most recent call last):
  File "/scratch/twj43146/Programming/PandABlocks-ioc-fork/.venv/lib/python3.10/site-packages/_pytest/runner.py", line 341, in from_call
    result: Optional[TResult] = func()
  File "/scratch/twj43146/Programming/PandABlocks-ioc-fork/.venv/lib/python3.10/site-packages/_pytest/runner.py", line 262, in <lambda>
    lambda: ihook(item=item, **kwds), when=when, reraise=reraise
  File "/scratch/twj43146/Programming/PandABlocks-ioc-fork/.venv/lib/python3.10/site-packages/pluggy/_hooks.py", line 493, in __call__
    return self._hookexec(self.name, self._hookimpls, kwargs, firstresult)
  File "/scratch/twj43146/Programming/PandABlocks-ioc-fork/.venv/lib/python3.10/site-packages/pluggy/_manager.py", line 115, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/scratch/twj43146/Programming/PandABlocks-ioc-fork/.venv/lib/python3.10/site-packages/pluggy/_callers.py", line 130, in _multicall
    teardown[0].send(outcome)
  File "/scratch/twj43146/Programming/PandABlocks-ioc-fork/.venv/lib/python3.10/site-packages/_pytest/unraisableexception.py", line 93, in pytest_runtest_teardown
    yield from unraisable_exception_runtest_hook()
  File "/scratch/twj43146/Programming/PandABlocks-ioc-fork/.venv/lib/python3.10/site-packages/_pytest/unraisableexception.py", line 78, in unraisable_exception_runtest_hook
    warnings.warn(pytest.PytestUnraisableExceptionWarning(msg))
pytest.PytestUnraisableExceptionWarning: Exception ignored on calling ctypes callback function: <function Channel.on_ca_connect at 0x7f508354af80>

Traceback (most recent call last):
  File "/scratch/twj43146/Programming/PandABlocks-ioc-fork/.venv/lib/python3.10/site-packages/aioca/_catools.py", line 207, in on_ca_connect
    self.__event_loop.call_soon_threadsafe(self.on_ca_connect_, op)
  File "/dls_sw/apps/python/miniforge/4.10.0-0/envs/python3.10/lib/python3.10/asyncio/base_events.py", line 798, in call_soon_threadsafe
    self._check_closed()
  File "/dls_sw/apps/python/miniforge/4.10.0-0/envs/python3.10/lib/python3.10/asyncio/base_events.py", line 515, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed

... is the failure all the tests using the mocked panda with aioca have.

After some digging I realised it's the latest release of pytest-asyncio causing this.

In the short term I'll pin pytest-asyncio to the previous version. We should figure out why this is happening though...

[AlexanderWells-diamond]

There was a breaking change in version 0.23.0. See issue and discussion about it here: pytest-dev/pytest-asyncio#706

[evalott100]

Probably want to follow something like this
https://pytest-asyncio.readthedocs.io/en/v0.23.2/how-to-guides/run_class_tests_in_same_loop.html