Proposal:

I want to be able to create utility subclasses ofIsolatedAsyncioTestCase that use either uvloop or a specific event loop using theasyncio.Runner(..., loop_factory=...) kwarg, Ideally it would look something like:

Another advantage of settingloop_factory would allow use ofIsolatedAsyncioTestCase without usingdef tearDownModule(): asyncio.set_event_loop_policy(None) becauseasyncio.Runner does not callasyncio.get_event_loop_policy() when called with aloop_factory

classDefaultIsolatedAsyncioTestCase:"""    Use the most efficient event loop regardless of what has been configured with asyncio.set_event_loop_policy    does not require `def tearDownModule(): asyncio.set_event_loop_policy(None)`    """loop_factory=asyncio.EventLoop

or

classUvloopIsolatedAsyncioTestCase:"""    runs tests on uvloop    """loop_factory=uvloop.new_event_loop

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/support-setting-the-loop-factory-in-isolatedasynciotestcase/36027

Linked PRs

• gh-110774: allow setting the Runner(loop_factory=...) from IsolatedAsyncioTestCase #110776