Fixed #17768 -- Add a comment about an expected failure in generic_views tests

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17700 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/generic_views/edit.py

@@ -126,6 +126,10 @@ class UpdateViewTests(TestCase):
 
         res = self.client.put('/edit/author/%d/update/' % a.pk,
                         {'name': 'Randall Munroe (author of xkcd)', 'slug': 'randall-munroe'})
+        # Here is the expected failure. PUT data are not processed in any special
+        # way by django. So the request will equal to a POST without data, hence
+        # the form will be invalid and redisplayed with errors (status code 200).
+        # See also #12635
         self.assertEqual(res.status_code, 302)
         self.assertRedirects(res, 'http://testserver/list/authors/')
         self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe (author of xkcd)>'])