3 files changed, 28 insertions, 2 deletions
diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index 6f737001de..fdfa000c0d 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Rails 3.2.6 (unreleased) ##
+
+*   Include mounted_helpers (helpers for accessing mounted engines) in ActionDispatch::IntegrationTest by default. *Piotr Sarnacki*
+
 ## Rails 3.2.4 (May 31, 2012) ##
 
 *   Deprecate old APIs for highlight, excerpt and word_wrap *Jeremy Walker*
diff --git a/actionpack/lib/action_dispatch/testing/integration.rb b/actionpack/lib/action_dispatch/testing/integration.rb
index ad78854471..ac784b3b60 100644
--- a/actionpack/lib/action_dispatch/testing/integration.rb
+++ b/actionpack/lib/action_dispatch/testing/integration.rb
@@ -177,8 +177,11 @@ module ActionDispatch
 
         # If the app is a Rails app, make url_helpers available on the session
         # This makes app.url_for and app.foo_path available in the console
-        if app.respond_to?(:routes) && app.routes.respond_to?(:url_helpers)
-          singleton_class.class_eval { include app.routes.url_helpers }
+        if app.respond_to?(:routes)
+          singleton_class.class_eval do
+            include app.routes.url_helpers if app.routes.respond_to?(:url_helpers)
+            include app.routes.mounted_helpers if app.routes.respond_to?(:mounted_helpers)
+          end
         end
 
         reset!
diff --git a/actionpack/test/controller/integration_test.rb b/actionpack/test/controller/integration_test.rb
index fda263310b..a9e59e2dbb 100644
--- a/actionpack/test/controller/integration_test.rb
+++ b/actionpack/test/controller/integration_test.rb
@@ -495,11 +495,26 @@ class ApplicationIntegrationTest < ActionDispatch::IntegrationTest
     @routes ||= ActionDispatch::Routing::RouteSet.new
   end
 
+  class MountedApp
+    def self.routes
+      @routes ||= ActionDispatch::Routing::RouteSet.new
+    end
+
+    routes.draw do
+      match 'baz', :to => 'application_integration_test/test#index', :as => :baz
+    end
+
+    def self.call(*)
+    end
+  end
+
   routes.draw do
     match '',    :to => 'application_integration_test/test#index', :as => :empty_string
 
     match 'foo', :to => 'application_integration_test/test#index', :as => :foo
     match 'bar', :to => 'application_integration_test/test#index', :as => :bar
+
+    mount MountedApp => '/mounted', :as => "mounted"
   end
 
   def app
@@ -512,6 +527,10 @@ class ApplicationIntegrationTest < ActionDispatch::IntegrationTest
     assert_equal '/bar', bar_path
   end
 
+  test "includes mounted helpers" do
+    assert_equal '/mounted/baz', mounted.baz_path
+  end
+
   test "route helpers after controller access" do
     get '/'
     assert_equal '/', empty_string_path