Avoided firing the request_finished signal in tests.

* Avoided calling BaseHttpResponse.close(). The test client take care of
  that since acc5396e.
* Disconnected the request_finished signal when this method must be
  called. The test client has a similar implementation since bacb097a.

tests/regressiontests/httpwrappers/tests.py

@@ -7,6 +7,8 @@ import pickle
 import warnings
 
 from django.core.exceptions import SuspiciousOperation
+from django.core.signals import request_finished
+from django.db import close_connection
 from django.http import (QueryDict, HttpResponse, HttpResponseRedirect,
                          HttpResponsePermanentRedirect, HttpResponseNotAllowed,
                          HttpResponseNotModified, StreamingHttpResponse,
@@ -484,6 +486,15 @@ class StreamingHttpResponseTests(TestCase):
             r.tell()
 
 class FileCloseTests(TestCase):
+
+    def setUp(self):
+        # Disable the request_finished signal during this test
+        # to avoid interfering with the database connection.
+        request_finished.disconnect(close_connection)
+
+    def tearDown(self):
+        request_finished.connect(close_connection)
+
     def test_response(self):
         filename = os.path.join(os.path.dirname(upath(__file__)), 'abc.txt')
 

tests/regressiontests/serializers_regress/tests.py

@@ -506,7 +506,6 @@ def streamTest(format, self):
             self.assertEqual(string_data, stream.getvalue())
         else:
             self.assertEqual(string_data, stream.content.decode('utf-8'))
-        stream.close()
 
 for format in serializers.get_serializer_formats():
     setattr(SerializerTests, 'test_' + format + '_serializer', curry(serializerTest, format))

tests/regressiontests/views/tests/static.py

@@ -27,7 +27,6 @@ class StaticTests(TestCase):
         for filename in media_files:
             response = self.client.get('/views/%s/%s' % (self.prefix, filename))
             response_content = b''.join(response)
-            response.close()
             file_path = path.join(media_dir, filename)
             with open(file_path, 'rb') as fp:
                 self.assertEqual(fp.read(), response_content)
@@ -36,14 +35,12 @@ class StaticTests(TestCase):
 
     def test_unknown_mime_type(self):
         response = self.client.get('/views/%s/file.unknown' % self.prefix)
-        response.close()
         self.assertEqual('application/octet-stream', response['Content-Type'])
 
     def test_copes_with_empty_path_component(self):
         file_name = 'file.txt'
         response = self.client.get('/views/%s//%s' % (self.prefix, file_name))
         response_content = b''.join(response)
-        response.close()
         with open(path.join(media_dir, file_name), 'rb') as fp:
             self.assertEqual(fp.read(), response_content)
 
@@ -52,7 +49,6 @@ class StaticTests(TestCase):
         response = self.client.get('/views/%s/%s' % (self.prefix, file_name),
             HTTP_IF_MODIFIED_SINCE='Thu, 1 Jan 1970 00:00:00 GMT')
         response_content = b''.join(response)
-        response.close()
         with open(path.join(media_dir, file_name), 'rb') as fp:
             self.assertEqual(fp.read(), response_content)
 
@@ -77,7 +73,6 @@ class StaticTests(TestCase):
         response = self.client.get('/views/%s/%s' % (self.prefix, file_name),
                                    HTTP_IF_MODIFIED_SINCE=invalid_date)
         response_content = b''.join(response)
-        response.close()
         with open(path.join(media_dir, file_name), 'rb') as fp:
             self.assertEqual(fp.read(), response_content)
         self.assertEqual(len(response_content),
@@ -94,7 +89,6 @@ class StaticTests(TestCase):
         response = self.client.get('/views/%s/%s' % (self.prefix, file_name),
                                    HTTP_IF_MODIFIED_SINCE=invalid_date)
         response_content = b''.join(response)
-        response.close()
         with open(path.join(media_dir, file_name), 'rb') as fp:
             self.assertEqual(fp.read(), response_content)
         self.assertEqual(len(response_content),