Add test for empty status code input
@@ -35,6 +35,7 @@ def test_urljoin(script_name, path_info, expected_url):
@pytest.mark.parametrize(
'status,code,reason',
[
+ (None, 200, 'OK'),
(200, 200, 'OK'),
('500', 500, 'Internal Server Error'),
(http_client.NOT_FOUND, 404, 'Not Found'),
