async callable not awaited in side_effect for AsyncMock

Bug report

Bug description:

In the AsyncMockMixin._execute_mock_call, the following test is done:

        if effect is not None:
            if _is_exception(effect):
                raise effect
            elif not _callable(effect):
                try:
                    result = next(effect)
                except StopIteration:
                    # It is impossible to propagate a StopIteration
                    # through coroutines because of PEP 479
                    raise StopAsyncIteration
                if _is_exception(result):
                    raise result
            elif iscoroutinefunction(effect):
                result = await effect(*args, **kwargs)
            else:
                result = effect(*args, **kwargs)

However elif iscoroutinefunction(effect) will return False for an awaitable that was defined this way:

    class AsyncCallable:
        async def __call__(self, *args, **kwargs):
            # await stuff
            pass

Note that __call__ is awaitable here but not detected as such.

iscoroutinefunction(effect.__call__) would return True in such a case however, so the fix might be as simple as:

            elif iscoroutinefunction(effect) or iscoroutinefunction(getattr(effect, '__call__', None)):

In the meantime, the workaround is to add markcoroutinefunction(self) to the class.

    class AsyncCallable:
        def __init__(self, *args, **kwargs):
            # init code
            markcoroutinefunction(self)  # workaround for iscoroutinefunction check in side_effect to return True

        ...

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Linked PRs

• gh-156465

Lib/unittest/mock.py の AsyncMockMixin._execute_mock_call から始め、リンクされた PR gh-156465 を確認してください。非同期の call メソッドを AsyncMock.side_effect として使用するオブジェクトの動作を確認し、その callable が正しく await されるように回帰テストのカバレッジを追加または更新してください。