Add a test for #2583 fix

tests/test_routers.py

@@ -302,12 +302,16 @@ class DynamicListAndDetailViewSet(viewsets.ViewSet):
         return Response({'method': 'link2'})
 
 
+class SubDynamicListAndDetailViewSet(DynamicListAndDetailViewSet):
+    pass
+
+
 class TestDynamicListAndDetailRouter(TestCase):
     def setUp(self):
         self.router = SimpleRouter()
 
-    def test_list_and_detail_route_decorators(self):
-        routes = self.router.get_routes(DynamicListAndDetailViewSet)
+    def _test_list_and_detail_route_decorators(self, viewset):
+        routes = self.router.get_routes(viewset)
         decorator_routes = [r for r in routes if not (r.name.endswith('-list') or r.name.endswith('-detail'))]
 
         MethodNamesMap = namedtuple('MethodNamesMap', 'method_name url_path')
@@ -336,3 +340,9 @@ class TestDynamicListAndDetailRouter(TestCase):
             else:
                 method_map = 'get'
             self.assertEqual(route.mapping[method_map], method_name)
+
+    def test_list_and_detail_route_decorators(self):
+        self._test_list_and_detail_route_decorators(DynamicListAndDetailViewSet)
+
+    def test_inherited_list_and_detail_route_decorators(self):
+        self._test_list_and_detail_route_decorators(SubDynamicListAndDetailViewSet)