pytest-dev / pytest-dev/pytest-asyncio

[Feature Request] Event-Loop fixture that does not automatically advance time

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Python
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Description

It would be ideal to add an additional clock_event_loop fixture with a custom AbstractEventLoop. Instead, this one would only advance time explicitly similar to the twisted.internet.task.Clock useful for testing twisted reactors. This would allow for tests to advance time and test time-based features to verify that they are correctly running when expected without having to wait for time to progress. If there is a different way to achieve this goal, I would appreciate the advice if I missed something.

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Research direction

Start by locating the existing event-loop fixture implementation and reviewing how a custom AbstractEventLoop could control time without automatic advancement. Compare the intended behavior with twisted.internet.task.Clock; done means tests can explicitly advance time and verify time-based features without waiting for real time to pass.

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Assessment

Tech stack
python
Domain
testing
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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