          result = self.renderer.render({}, renderer_context=context)
          assert result == '500 Internal Server Error'
  
  
  class BrowsableAPIRendererTests(TestCase):
  
      def setUp(self):
          self.renderer = BrowsableAPIRenderer()
  
      def test_get_description_returns_empty_string_for_401_and_403_statuses(self):
 
</s> remove     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
 </s> add     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',
        }

        assert routes[2].url == '^{prefix}/{lookup}/action3{trailing_slash}$'
        assert routes[2].mapping == {
            'post': 'action3',
            'delete': 'action3_delete',
        }

    def test_multiple_action_handlers(self):
        # Standard action
        response = self.client.post(reverse('basic-action3', args=[1]))
        assert response.data == {'post': '1'}

        # Additional handler registered with MethodMapper
        response = self.client.delete(reverse('basic-action3', args=[1]))
        assert response.data == {'delete': '1'} </s> remove class TestSimpleRouter(TestCase):
 </s> add 
class BrowsableAPIRendererTests(URLPatternsTestCase):
    class ExampleViewSet(ViewSet):
        def list(self, request):
            return Response()

        @action(detail=False, name="Extra list action")
        def list_action(self, request):
            raise NotImplementedError

    router = SimpleRouter()
    router.register('examples', ExampleViewSet, base_name='example')
    urlpatterns = [url(r'^api/', include(router.urls))]
          result = self.renderer.render({}, renderer_context=context)
          assert result == '500 Internal Server Error'
  
  
class BrowsableAPIRendererTests(URLPatternsTestCase):
    class ExampleViewSet(ViewSet):
        def list(self, request):
            return Response()

        @action(detail=False, name="Extra list action")
        def list_action(self, request):
            raise NotImplementedError

    router = SimpleRouter()
    router.register('examples', ExampleViewSet, base_name='example')
    urlpatterns = [url(r'^api/', include(router.urls))]
  
      def setUp(self):
          self.renderer = BrowsableAPIRenderer()
  
      def test_get_description_returns_empty_string_for_401_and_403_statuses(self):
keep keep keep keep replace keep keep keep keep keep
 Improvements to ViewSet extra actions (#5605)

* View suffix already set by initializer

* Add 'name' and 'description' attributes to ViewSet

ViewSets may now provide their `name` and `description` attributes
directly, instead of relying on view introspection to derive them.
These attributes may also be provided with the view's initkwargs.

The ViewSet `name` and `suffix` initkwargs are mutually exclusive.

The `action` decorator now provides the `name` and `description` to
the view's initkwargs. By default, these values are derived from the
method name and its docstring. The `name` may be overridden by providing
it as an argument to the decorator.

The `get_view_name` and `get_view_description` hooks now provide the
view instance to the handler, instead of the view class. The default
implementations of these handlers now respect the `name`/`description`.

* Add 'extra actions' to ViewSet & browsable APIs

* 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.

* Add method mapping to ViewSet actions

* Document extra action method mapping 
tests/test_renderers.py