2 files changed, 20 insertions, 0 deletions
diff --git a/actionpack/test/abstract_unit.rb b/actionpack/test/abstract_unit.rb
index 40ca23a39d..74efcba666 100644
--- a/actionpack/test/abstract_unit.rb
+++ b/actionpack/test/abstract_unit.rb
@@ -286,6 +286,7 @@ module ActionController
     include ActionController::Testing
     # This stub emulates the Railtie including the URL helpers from a Rails application
     include SharedTestRoutes.url_helpers
+    include SharedTestRoutes.mounted_helpers
 
     self.view_paths = FIXTURE_LOAD_PATH
 
diff --git a/actionpack/test/template/test_case_test.rb b/actionpack/test/template/test_case_test.rb
index a75f1bc981..13a2b7fb6f 100644
--- a/actionpack/test/template/test_case_test.rb
+++ b/actionpack/test/template/test_case_test.rb
@@ -222,6 +222,25 @@ module ActionView
       end
     end
 
+    test "is able to use mounted routes" do
+      with_routing do |set|
+        app = Class.new do
+          def self.routes
+            @routes ||= ActionDispatch::Routing::RouteSet.new
+          end
+
+          routes.draw { get "bar", :to => lambda {} }
+
+          def self.call(*)
+          end
+        end
+
+        set.draw { mount app => "/foo", :as => "foo_app" }
+
+        assert_equal '/foo/bar', foo_app.bar_path
+      end
+    end
+
     test "named routes can be used from helper included in view" do
       with_routing do |set|
         set.draw { resources :contents }