Method test_tuple_warning

testing/test_warnings.py:561–571

(self, pytester: Pytester)

        result.stdout.fnmatch_lines(["*PytestAssertRewriteWarning: %s*" % msg])

    def test_tuple_warning(self, pytester: Pytester) -> None:
        pytester.makepyfile(
            """\
            def test_foo():
                assert (1,2)
            """
        )
        result = pytester.runpytest()
        self.assert_result_warns(
            result, "assertion is always true, perhaps remove parentheses?"
        )


def test_warnings_checker_twice() -> None: