Method assert_result_warns

testing/test_warnings.py:558–559

(result, msg)

class TestAssertionWarnings:
    @staticmethod
    def assert_result_warns(result, msg) -> None:
        result.stdout.fnmatch_lines(["*PytestAssertRewriteWarning: %s*" % msg])

    def test_tuple_warning(self, pytester: Pytester) -> None:
        pytester.makepyfile(