Race/block condition when running client and server in same asyncio eventloop (under pytest)

[rambo]

all async as per title

Describe the bug
When running both server and client under pytest polling values and change notifications fail with timeout.

To Reproduce

• Clone https://gitlab.com/advian-oss/python-asynuapytestexample/-/tree/test_demo?ref_type=heads (note the branch)
• poetry install
• poetry run py.test -v

Or see https://gitlab.com/advian-oss/python-asynuapytestexample/-/merge_requests/1 CI test results

Expected behavior
Running both server and client under same eventloop should work normally.

Version
Python-Version: 3.11
opcua-asyncio Version (e.g. master branch, 0.9): asyncua==1.1.0

[rambo]

Root cause might be on the client side, I will update tests to demonstrate later but when I moved the server to a subprocess in the project where I originally ran into this it didn't help.

[oroulet]

I have not looked at your code yet but we run clients and server in same loop all the time in tests so your problem must be some special case. Or a bug on your side