Added tests for PATCH form in the Browsable API

* Added the `tests.utils.Client` (`django.test.client.Client` subclass with
  patch method support)
* Added tests for PATCH form in the Browsable API.

rest_framework/tests/authentication.py

@@ -1,12 +1,13 @@
 from django.contrib.auth.models import User
 from django.http import HttpResponse
-from django.test import Client, TestCase
+from django.test import TestCase
 
 from rest_framework import permissions
 from rest_framework.authtoken.models import Token
 from rest_framework.authentication import TokenAuthentication
 from rest_framework.compat import patterns
 from rest_framework.views import APIView
+from rest_framework.tests.utils import Client
 
 import json
 import base64
@@ -18,6 +19,9 @@ class MockView(APIView):
     def post(self, request):
         return HttpResponse({'a': 1, 'b': 2, 'c': 3})
 
+    def patch(self, request):
+        return HttpResponse({'a': 1, 'b': 2, 'c': 3})
+
     def put(self, request):
         return HttpResponse({'a': 1, 'b': 2, 'c': 3})
 
@@ -102,6 +106,14 @@ class SessionAuthTests(TestCase):
         response = self.non_csrf_client.put('/', {'example': 'example'})
         self.assertEqual(response.status_code, 200)
 
+    def test_patch_form_session_auth_passing(self):
+        """
+        Ensure PATCHting form over session authentication with logged in user and CSRF token passes.
+        """
+        self.non_csrf_client.login(username=self.username, password=self.password)
+        response = self.non_csrf_client.patch('/', {'example': 'example'})
+        self.assertEqual(response.status_code, 200)
+
     def test_post_form_session_auth_failing(self):
         """
         Ensure POSTing form over session authentication without logged in user fails.

rest_framework/tests/renderers.py

@@ -111,6 +111,9 @@ class POSTDeniedView(APIView):
     def put(self, request):
         return Response()
 
+    def patch(self, request):
+        return Response()
+
 
 class DocumentingRendererTests(TestCase):
     def test_only_permitted_forms_are_displayed(self):
@@ -119,6 +122,7 @@ class DocumentingRendererTests(TestCase):
         response = view(request).render()
         self.assertNotContains(response, '>POST<')
         self.assertContains(response, '>PUT<')
+        self.assertContains(response, '>PATCH<')
 
 
 class RendererEndToEndTests(TestCase):

rest_framework/tests/utils.py

@@ -1,9 +1,9 @@
-from django.test.client import RequestFactory, FakePayload
+from django.test.client import Client as _Client, RequestFactory as _RequestFactory, FakePayload
 from django.test.client import MULTIPART_CONTENT
 from urlparse import urlparse
 
 
-class RequestFactory(RequestFactory):
+class RequestFactory(_RequestFactory):
 
     def __init__(self, **defaults):
         super(RequestFactory, self).__init__(**defaults)
@@ -25,3 +25,15 @@ class RequestFactory(RequestFactory):
         }
         r.update(extra)
         return self.request(**r)
+
+
+class Client(_Client, RequestFactory):
+    def patch(self, path, data={}, content_type=MULTIPART_CONTENT,
+            follow=False, **extra):
+        """
+        Send a resource to the server using PATCH.
+        """
+        response = super(Client, self).patch(path, data=data, content_type=content_type, **extra)
+        if follow:
+            response = self._handle_redirects(response, **extra)
+        return response