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🐛 Fix inspect.getcoroutinefunction() can break testing with unittest.mock.patch() #14022

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🐛 Fix inspect.getcoroutinefunction() can break testing with unittest.mock.patch() #14022

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Description

This issue is related to a known Python bug that was fixed in Python 3.13 but has not been backported to earlier versions: python/cpython#94924
As a workaround for versions prior to Python 3.13, we could consider using conditional imports based on the Python version:

Resolves #14021

if sys.version_info < (3, 13):
    from asyncio import iscoroutinefunction
else:
    from inspect import iscoroutinefunction

Example Code

import sys
import asyncio
import inspect
from unittest.mock import create_autospec, patch

print(f"Python version: {sys.version_info[:2]}") # (3, 12)

async def foo():
    pass

mock_autospec = create_autospec(foo)
print(asyncio.iscoroutinefunction(mock_autospec)) # True
print(inspect.iscoroutinefunction(mock_autospec)) # False

with patch('__main__.foo', autospec=True) as mock_foo:
    print(asyncio.iscoroutinefunction(mock_foo)) # True
    print(inspect.iscoroutinefunction(mock_foo)) # False

@edgarrmondragon edgarrmondragon mentioned this pull request Aug 31, 2025
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@YuriiMotov YuriiMotov changed the title 🐛 Fix inspect.getcoroutinefunction() can break testing with unittest.mock.patch() 🐛 Fix inspect.getcoroutinefunction() can break testing with unittest.mock.patch() Aug 31, 2025
@YuriiMotov YuriiMotov added the bug Something isn't working label Aug 31, 2025
YuriiMotov
YuriiMotov approved these changes Aug 31, 2025
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LGTM

Thanks!

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@YuriiMotov YuriiMotov YuriiMotov approved these changes

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@secrett2633 @YuriiMotov