1 files changed, 8 insertions, 4 deletions
diff --git a/actionpack/lib/action_dispatch/routing/endpoint.rb b/actionpack/lib/action_dispatch/routing/endpoint.rb
index 88aa13c3e8..24dced1efd 100644
--- a/actionpack/lib/action_dispatch/routing/endpoint.rb
+++ b/actionpack/lib/action_dispatch/routing/endpoint.rb
@@ -1,10 +1,14 @@
+# frozen_string_literal: true
+
 module ActionDispatch
   module Routing
     class Endpoint # :nodoc:
-      def dispatcher?;   false; end
-      def redirect?;     false; end
-      def matches?(req); true;  end
-      def app;           self;  end
+      def dispatcher?;                           false; end
+      def redirect?;                             false; end
+      def engine?;       rack_app.respond_to?(:routes); end
+      def matches?(req);                          true; end
+      def app;                                    self; end
+      def rack_app;                                app; end
     end
   end
 end