Fixed #5897 -- Added the Content-Length response header in CommonMiddleware

Thanks Tim Graham for the review.

1 files changed, 6 insertions, 5 deletions

diff --git a/tests/wsgi/tests.py b/tests/wsgi/tests.py
index f472d4fab9..03ac7ee706 100644
--- a/tests/wsgi/tests.py
+++ b/tests/wsgi/tests.py
@@ -41,11 +41,12 @@ class WSGITest(SimpleTestCase):
 
         self.assertEqual(response_data["status"], "200 OK")
         self.assertEqual(
-            response_data["headers"],
-            [('Content-Type', 'text/html; charset=utf-8')])
-        self.assertEqual(
-            bytes(response),
-            b"Content-Type: text/html; charset=utf-8\r\n\r\nHello World!")
+            set(response_data["headers"]),
+            {('Content-Length', '12'), ('Content-Type', 'text/html; charset=utf-8')})
+        self.assertTrue(bytes(response) in [
+            b"Content-Length: 12\r\nContent-Type: text/html; charset=utf-8\r\n\r\nHello World!",
+            b"Content-Type: text/html; charset=utf-8\r\nContent-Length: 12\r\n\r\nHello World!"
+        ])
 
     def test_file_wrapper(self):
         """