def METHOD_NAME(self, mock_requests):
    """Tests a valid 419 response for generate_short_url method."""
    mock_response = mock.Mock(ok=False, status_code=419)
    mock_response.raise_for_status.side_effect = HTTPError()
    mock_requests.return_value = mock_response
    self.assertRaises(HTTPError, generate_short_url, self.test_url)