Added tests for conditional_content_removal.

Refs #7581. Thanks mrmachine.

tests/regressiontests/http_utils/tests.py

@@ -0,0 +1,45 @@
+from __future__ import unicode_literals
+
+from django.http import HttpRequest, HttpResponse, StreamingHttpResponse
+from django.http.utils import conditional_content_removal
+from django.test import TestCase
+
+
+class HttpUtilTests(TestCase):
+
+    def test_conditional_content_removal(self):
+        """
+        Tests that content is removed from regular and streaming responses with
+        a status_code of 100-199, 204, 304 or a method of "HEAD".
+        """
+        req = HttpRequest()
+
+        # Do nothing for 200 responses.
+        res = HttpResponse('abc')
+        conditional_content_removal(req, res)
+        self.assertEqual(res.content, b'abc')
+
+        res = StreamingHttpResponse(['abc'])
+        conditional_content_removal(req, res)
+        self.assertEqual(b''.join(res), b'abc')
+
+        # Strip content for some status codes.
+        for status_code in (100, 150, 199, 204, 304):
+            res = HttpResponse('abc', status=status_code)
+            conditional_content_removal(req, res)
+            self.assertEqual(res.content, b'')
+
+            res = StreamingHttpResponse(['abc'], status=status_code)
+            conditional_content_removal(req, res)
+            self.assertEqual(b''.join(res), b'')
+
+        # Strip content for HEAD requests.
+        req.method = 'HEAD'
+
+        res = HttpResponse('abc')
+        conditional_content_removal(req, res)
+        self.assertEqual(res.content, b'')
+
+        res = StreamingHttpResponse(['abc'])
+        conditional_content_removal(req, res)
+        self.assertEqual(b''.join(res), b'')