Method assertParseFail

Lib/test/test_optparse.py:139–149

Assert the parser fails with the expected message. Caller must ensure that self.parser is an InterceptingOptionParser.

(self, cmdline_args, expected_output)

    # -- Assertions used in more than one class --------------------

    def assertParseFail(self, cmdline_args, expected_output):
        """
        Assert the parser fails with the expected message.  Caller
        must ensure that self.parser is an InterceptingOptionParser.
        """
        try:
            self.parser.parse_args(cmdline_args)
        except InterceptedError as err:
            self.assertEqual(err.error_message, expected_output)
        else:
            self.assertFalse("expected parse failure")

    def assertOutput(self,
                     cmdline_args,