Method assertWarnsRegex

Lib/unittest/case.py:1421–1438

Asserts that the message in a triggered warning matches a regexp. Basic functioning is similar to assertWarns() with the addition that only warnings whose messages also match the regular expression are considered successful matches. Args: expected_warning

(self, expected_warning, expected_regex,
                         *args, **kwargs)

        return context.handle('assertRaisesRegex', args, kwargs)

    def assertWarnsRegex(self, expected_warning, expected_regex,
                         *args, **kwargs):
        """Asserts that the message in a triggered warning matches a regexp.
        Basic functioning is similar to assertWarns() with the addition
        that only warnings whose messages also match the regular expression
        are considered successful matches.

        Args:
            expected_warning: Warning class expected to be triggered.
            expected_regex: Regex (re.Pattern object or string) expected
                    to be found in error message.
            args: Function to be called and extra positional args.
            kwargs: Extra kwargs.
            msg: Optional message used in case of failure. Can only be used
                    when assertWarnsRegex is used as a context manager.
        """
        context = _AssertWarnsContext(expected_warning, self, expected_regex)
        return context.handle('assertWarnsRegex', args, kwargs)

    def assertRegex(self, text, expected_regex, msg=None):
        """Fail the test unless the text matches the regular expression."""