def test_header_items(self):
response = Response()
response.delete_cookie('test_cookie')
response.headers['Location'] = '/'
self.assertEqual(response.headers_items().sort(), [
('Content-Type', 'text/html; charset=utf8'),
('Location', '/'),
('Set-Cookie', ' test_cookie=; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/')
].sort())
