REST_FRAMEWORK = {
'DEFAULT_AUTHENTICATION_CLASSES': (
    'rest_framework.authentication.BasicAuthentication',
),
'DEFAULT_PERMISSION_CLASSES': (
    'rest_framework.permissions.IsAuthenticated',
)}

def test_retrieve(self):
    user = UserFactory.create()
    client = APIClient()
    client.login(email=user.email, password=user.password)
    entity = AttributeChoiceFactory.create()
    response = self.get(retrieve=entity.pk)
    self.assertEqual(response.status_code, status.HTTP_200_OK)
    item = json.loads(response.content)
    self.assertEqual(type(item), dict)
    self.assertEqual(item['pk'], entity.pk)
    self.assertItemsEqual(AttributeChoiceSerializer.Meta.fields, item.keys())