Update simple router tests

Removed old test logic around link/action decorators from `v2.3`. Also
simplified the test by making the results explicit instead of computed.

tests/test_routers.py

@@ -103,44 +103,29 @@ class BasicViewSet(viewsets.ViewSet):
     def action1(self, request, *args, **kwargs):
         return Response({'method': 'action1'})
 
-    @action(methods=['post'], detail=True)
+    @action(methods=['post', 'delete'], detail=True)
     def action2(self, request, *args, **kwargs):
         return Response({'method': 'action2'})
 
-    @action(methods=['post', 'delete'], detail=True)
-    def action3(self, request, *args, **kwargs):
-        return Response({'method': 'action2'})
-
-    @action(detail=True)
-    def link1(self, request, *args, **kwargs):
-        return Response({'method': 'link1'})
-
-    @action(detail=True)
-    def link2(self, request, *args, **kwargs):
-        return Response({'method': 'link2'})
-
 
 class TestSimpleRouter(TestCase):
     def setUp(self):
         self.router = SimpleRouter()
 
-    def test_link_and_action_decorator(self):
-        routes = self.router.get_routes(BasicViewSet)
-        decorator_routes = routes[2:]
-        # Make sure all these endpoints exist and none have been clobbered
-        for i, endpoint in enumerate(['action1', 'action2', 'action3', 'link1', 'link2']):
-            route = decorator_routes[i]
-            # check url listing
-            assert route.url == '^{{prefix}}/{{lookup}}/{0}{{trailing_slash}}$'.format(endpoint)
-            # check method to function mapping
-            if endpoint == 'action3':
-                methods_map = ['post', 'delete']
-            elif endpoint.startswith('action'):
-                methods_map = ['post']
-            else:
-                methods_map = ['get']
-            for method in methods_map:
-                assert route.mapping[method] == endpoint
+    def test_action_routes(self):
+        # Get action routes (first two are list/detail)
+        routes = self.router.get_routes(BasicViewSet)[2:]
+
+        assert routes[0].url == '^{prefix}/{lookup}/action1{trailing_slash}$'
+        assert routes[0].mapping == {
+            'post': 'action1',
+        }
+
+        assert routes[1].url == '^{prefix}/{lookup}/action2{trailing_slash}$'
+        assert routes[1].mapping == {
+            'post': 'action2',
+            'delete': 'action2',
+        }
 
 
 class TestRootView(URLPatternsTestCase, TestCase):