Django Rest Framework - How to test ViewSet?

Question

I'm having trouble testing a ViewSet:

class ViewSetTest(TestCase):     def test_view_set(self):         factory = APIRequestFactory()         view = CatViewSet.as_view()         cat = Cat(name="bob")         cat.save()          request = factory.get(reverse('cat-detail', args=(cat.pk,)))         response = view(request) 

I'm trying to replicate the syntax here:

http://www.django-rest-framework.org/api-guide/testing#forcing-authentication

But I think their AccountDetail view is different from my ViewSet, so I'm getting this error from the last line:

AttributeError: 'NoneType' object has no attributes 'items' 

Is there a correct syntax here or am I mixing up concepts? My APIClient tests work, but I'm using the factory here because I would eventually like to add "request.user = some_user". Thanks in advance!

Oh and the client test works fine:

def test_client_view(self):     response = APIClient().get(reverse('cat-detail', args=(cat.pk,)))     self.assertEqual(response.status_code, 200) 

Answer 1

I think I found the correct syntax, but not sure if it is conventional (still new to Django):

def test_view_set(self):     request = APIRequestFactory().get("")     cat_detail = CatViewSet.as_view({'get': 'retrieve'})     cat = Cat.objects.create(name="bob")     response = cat_detail(request, pk=cat.pk)     self.assertEqual(response.status_code, 200) 

So now this passes and I can assign request.user, which allows me to customize the retrieve method under CatViewSet to consider the user.