Class CapturedWarnings

testing/test_warnings.py:659–666

    @pytest.fixture
    def capwarn(self, pytester: Pytester):
        class CapturedWarnings:
            captured: List[
                Tuple[warnings.WarningMessage, Optional[Tuple[str, int, str]]]
            ] = []

            @classmethod
            def pytest_warning_recorded(cls, warning_message, when, nodeid, location):
                cls.captured.append((warning_message, location))

        pytester.plugins = [CapturedWarnings()]