{"action":"created","comment":{"url":"https://api.github.com/repos/edx/edx-platform/pulls/comments/31830215","id":31830215,"diff_hunk":"@@ -1507,16 +1515,52 @@ def test_group_access(self, role_name, course_is_cohorted, thread_group_state):\n         FORUM_ROLE_COMMUNITY_TA,\n         FORUM_ROLE_STUDENT,\n     )\n-    def test_non_author_access(self, role_name):\n+    def test_author_only_fields(self, role_name):\n         role = Role.objects.create(name=role_name, course_id=self.course.id)\n         role.users = [self.user]\n         self.register_thread({\"user_id\": str(self.user.id + 1)})\n+        data = {field: \"edited\" for field in [\"topic_id\", \"title\", \"raw_body\"]}\n+        data[\"type\"] = \"question\"\n         expected_error = role_name == FORUM_ROLE_STUDENT\n         try:\n-            update_thread(self.request, \"test_thread\", {})\n+            update_thread(self.request, \"test_thread\", data)\n             self.assertFalse(expected_error)\n-        except PermissionDenied:\n+        except ValidationError as err:\n             self.assertTrue(expected_error)\n+            self.assertEqual(\n+                err.message_dict,\n+                {field: [\"This field is not editable.\"] for field in data.keys()}\n+            )\n+\n+    @ddt.data(*itertools.product([True, False], [True, False]))\n+    @ddt.unpack\n+    def test_following(self, old_following, new_following):\n+        if 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string could be helpful here.","created_at":"2015-06-05T16:52:45Z","updated_at":"2015-06-05T16:52:45Z","html_url":"https://github.com/edx/edx-platform/pull/8372#discussion_r31830215","pull_request_url":"https://api.github.com/repos/edx/edx-platform/pulls/8372","_links":{"self":{"href":"https://api.github.com/repos/edx/edx-platform/pulls/comments/31830215"},"html":{"href":"https://github.com/edx/edx-platform/pull/8372#discussion_r31830215"},"pull_request":{"href":"https://api.github.com/repos/edx/edx-platform/pulls/8372"}}},"pull_request":{"url":"https://api.github.com/repos/edx/edx-platform/pulls/8372","id":36960357,"html_url":"https://github.com/edx/edx-platform/pull/8372","diff_url":"https://github.com/edx/edx-platform/pull/8372.diff","patch_url":"https://github.com/edx/edx-platform/pull/8372.patch","issue_url":"https://api.github.com/repos/edx/edx-platform/issues/8372","number":8372,"state":"open","locked":false,"title":"Add ability to follow a thread in discussion 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