Add test to verify renders don't add response to Request

We already added a test that verified that a renderer no longer
mutated request.response, now we also have  a test that verifies that if
no response exists, then it won't be touched either.

1 files changed, 10 insertions, 0 deletions

diff --git a/pyramid/tests/test_renderers.py b/pyramid/tests/test_renderers.py
index a41345b87..4d40189a5 100644
--- a/pyramid/tests/test_renderers.py
+++ b/pyramid/tests/test_renderers.py
@@ -482,6 +482,16 @@ class Test_render(unittest.TestCase):
         self.assertEqual(result, '{"a": 1}')
         self.assertEqual(request.response, response)
 
+    def test_it_deletes_response(self):
+        request = testing.DummyRequest()
+        try:
+            delattr(request, 'response')
+        except AttributeError:
+            pass
+        result = self._callFUT('json', dict(a=1), request=request)
+        self.assertEqual(result, '{"a": 1}')
+        self.assertFalse(hasattr(request, 'request'))
+
 class Test_render_to_response(unittest.TestCase):
     def setUp(self):
         self.config = testing.setUp()