adde total_results to search response, for better frontend pagination

products/tests.py

@@ -478,6 +478,7 @@ class ProductSearchTest(TestCase):
         url = f"{self.endpoint}?query_string={query_string}"
         # send in request
         response = self.client.get(url)
+        # import ipdb; ipdb.set_trace()
 
         # check response
         self.assertEqual(response.status_code, 200)
@@ -521,8 +522,9 @@ class ProductSearchTest(TestCase):
         self.assertEqual(response.status_code, 200)
         # load response data
         payload = response.json()
-        # check for object creation
         self.assertEquals(len(payload['products']), limit)
+        self.assertEquals(payload['total_results'], len(expected_instances))
+
 
 class MyProductsViewTest(APITestCase):
     """my_products tests