Add more tests and docs to uncountable routes. [#3930 state:resolved]

Author: rizwanreza

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -425,10 +425,11 @@ def member_name
             singular
           end
 
+          # Checks for uncountable plurals, and appends "_index" if they're.
           def collection_name
             uncountable? ? "#{plural}_index" : plural
           end
-          
+
           def uncountable?
             singular == plural
           end

actionpack/test/dispatch/routing_test.rb

@@ -113,7 +113,7 @@ def self.matches?(request)
       resources :posts, :only => [:index, :show] do
         resources :comments, :except => :destroy
       end
-      
+
       resources :sheep
 
       match 'sprockets.js' => ::TestRoutingMapper::SprocketsApp
@@ -532,11 +532,13 @@ def test_resource_routes_with_only_and_except
       assert_raise(ActionController::RoutingError) { delete '/posts/1/comments' }
     end
   end
-  
+
   def test_resources_for_uncountable_names
     with_test_routes do
       assert_equal '/sheep', sheep_index_path
       assert_equal '/sheep/1', sheep_path(1)
+      assert_equal '/sheep/new', new_sheep_path
+      assert_equal '/sheep/1/edit', edit_sheep_path(1)
     end
   end