additional note about routes in functional tests for engines [ci skip]

1 files changed, 10 insertions, 0 deletions

diff --git a/guides/source/engines.md b/guides/source/engines.md
index 9106b6382d..daf2956148 100644
--- a/guides/source/engines.md
+++ b/guides/source/engines.md
@@ -721,6 +721,16 @@ get :index, use_route: :blorgh
 
 This tells the application that you still want to perform a `GET` request to the `index` action of this controller, just that you want to use the engine's route to get there, rather than the application.
 
+Another way to do this is to assign the `@routes` instance variable to `Engine.routes` in your test setup:
+
+```ruby
+setup do
+  @routes = Engine.routes
+end
+```
+
+This will also ensure url helpers for the engine will work as expected in your tests.
+
 Improving engine functionality
 ------------------------------