Add failing test for resource name consistency

When setting `resource_name = None`, the related instance's resource
name is used in `relationships`, but `None` is used in `included`.

This is related to #94 and #124

Author: martinmaillard

example/tests/integration/test_model_resource_name.py

@@ -103,6 +103,11 @@ def test_type_match_on_included_and_inline_with_serializer_resource_name(self, c
 
         _check_relationship_and_included_comment_type_are_the_same(client, reverse("entry-list"))
 
+    def test_type_match_on_included_and_inline_with_serializer_resource_name2(self, client):
+        serializers.CommentSerializer.Meta.resource_name = None
+
+        _check_relationship_and_included_comment_type_are_the_same(client, reverse("entry-list"))
+
     def test_type_match_on_included_and_inline_with_serializer_resource_name_and_JSONAPIMeta(self, client):
         models.Comment.__bases__ += (_PatchedModel,)
         serializers.CommentSerializer.Meta.resource_name = "resource_name_from_serializer"