Double pagination of Chains (#1253)

Doubles the `max_limit`/`default_limit` of `Chains` to 40:

- Set `max_limit`/`default_limit` to 40
- Update tests accordingly

src/chains/tests/test_views.py

@@ -117,21 +117,21 @@ def test_json_payload_format(self) -> None:
 
 class ChainPaginationViewTests(APITestCase):
     def test_pagination_next_page(self) -> None:
-        ChainFactory.create_batch(21)
+        ChainFactory.create_batch(41)
         url = reverse("v1:chains:list")
 
         response = self.client.get(path=url, data=None, format="json")
 
         self.assertEqual(response.status_code, 200)
         # number of items should be equal to the number of total items
-        self.assertEqual(response.json()["count"], 21)
+        self.assertEqual(response.json()["count"], 41)
         self.assertEqual(
             response.json()["next"],
-            "http://testserver/api/v1/chains/?limit=20&offset=20",
+            "http://testserver/api/v1/chains/?limit=40&offset=40",
         )
         self.assertEqual(response.json()["previous"], None)
         # returned items should be equal to max_limit
-        self.assertEqual(len(response.json()["results"]), 20)
+        self.assertEqual(len(response.json()["results"]), 40)
 
     def test_request_more_than_max_limit_should_return_max_limit(self) -> None:
         ChainFactory.create_batch(101)
@@ -145,25 +145,25 @@ def test_request_more_than_max_limit_should_return_max_limit(self) -> None:
         self.assertEqual(response.json()["count"], 101)
         self.assertEqual(
             response.json()["next"],
-            "http://testserver/api/v1/chains/?limit=20&offset=20",
+            "http://testserver/api/v1/chains/?limit=40&offset=40",
         )
         self.assertEqual(response.json()["previous"], None)
         # returned items should still be equal to max_limit
-        self.assertEqual(len(response.json()["results"]), 20)
+        self.assertEqual(len(response.json()["results"]), 40)
 
     def test_offset_greater_than_count(self) -> None:
-        ChainFactory.create_batch(21)
+        ChainFactory.create_batch(41)
         # requesting offset of number of chains
-        url = reverse("v1:chains:list") + f'{"?offset=21"}'
+        url = reverse("v1:chains:list") + f'{"?offset=41"}'
 
         response = self.client.get(path=url, data=None, format="json")
 
         self.assertEqual(response.status_code, 200)
-        self.assertEqual(response.json()["count"], 21)
+        self.assertEqual(response.json()["count"], 41)
         self.assertEqual(response.json()["next"], None)
         self.assertEqual(
             response.json()["previous"],
-            "http://testserver/api/v1/chains/?limit=20&offset=1",
+            "http://testserver/api/v1/chains/?limit=40&offset=1",
         )
         # returned items should still be zero
         self.assertEqual(len(response.json()["results"]), 0)

src/chains/views.py

@@ -12,8 +12,8 @@
 
 
 class ChainsPagination(LimitOffsetPagination):
-    default_limit = 20
-    max_limit = 20
+    default_limit = 40
+    max_limit = 40
 
 
 class ChainsListView(ListAPIView):  # type: ignore[type-arg]