Django Mock Test - Caching GraphQL Query

The code below is my attempt to cache the response of a graphql query and a test to make sure the content is getting cached. I got this error: 'self' parameter lacking default value and it appears when running the test... Does anyone know what may be the issue? Is it a wrong implementation of mock? I feel like I can't think of any other way to write the test...

This is the code that appears on the view:

def fetch_cache_key(request):
    """ Returns a hashed cache key. """
    m = hashlib.md5()
    m.update(request.body)

   return m.hexdigest()

class GraphQLView(StaticApiKeyOrInternalMixin, GraphQLView):
    """ GraphQL view for clients that use an API key. """


    def super_call(self, request, *args, **kwargs):
        """ Returns dispatch response """
        response = super(GraphQLView, self).dispatch(self, request, *args, **kwargs)

        return response

    def dispatch(self, request, *args, **kwargs):
        """ Fetches queried data from graphql and returns cached & hashed key """
        cache_key = fetch_cache_key(request)
        response_text = cache.get(cache_key)

        if not response_text:
            response = self.super_call(request, *args, **kwargs)

            # cache key and value (all text)
            cache.set(cache_key, response.text, 300)

        else:
            response = HttpResponse(content='response_text', content_type='application/json', status=200)

        return response

This is the code that appears in the test:

class TestGraphqlView(SimpleTestCase):

    nosegae_datastore_v3 = True
    nosegae_memcache = True
    nosegae_taskqueue = True

    def setUp(self):
        self.client = Client()
        self.url = reverse('graphql_view')
        self.headers = {
            'HTTP_API_KEY': settings.VALID_API_KEYS[0],
       }

    @patch.object(GraphQLView, 'super_call', autospec=True)
    def test_graphql_view(self, mock_super_call):
        # Expects return value to be response = HttpResponse(content='response_text', content_type='application/json', status=200)
        # mock_super_call.return_value.text = 'asdifua'
        mock_super_call.return_value.text = HttpResponse(content='response_text', content_type='application/json', status=200)
        response = self.client.post(
            self.url,
            data={
                'portal_id': 'test_portal_id',
                'language': 'en',
                'page_size': 100,
            },
            **self.headers
        )
        # self.assertEqual(mock_super_call.called, True)
        mock_super_call.assert_called_once_with()

Any help would be appreciated.