1 files changed, 25 insertions, 3 deletions
diff --git a/actionpack/test/controller/helper_test.rb b/actionpack/test/controller/helper_test.rb
index 20f99f19ee..e263ed341f 100644
--- a/actionpack/test/controller/helper_test.rb
+++ b/actionpack/test/controller/helper_test.rb
@@ -29,7 +29,7 @@ module ImpressiveLibrary
   def useful_function() end
 end
 
-ActionController::Base.send :include, ImpressiveLibrary
+ActionController::Base.include(ImpressiveLibrary)
 
 class JustMeController < ActionController::Base
   clear_helpers
@@ -60,6 +60,12 @@ class HelpersPathsController < ActionController::Base
   end
 end
 
+class HelpersTypoController < ActionController::Base
+  path = File.expand_path('../../fixtures/helpers_typo', __FILE__)
+  $:.unshift(path)
+  self.helpers_path = path
+end
+
 module LocalAbcHelper
   def a() end
   def b() end
@@ -82,6 +88,22 @@ class HelperPathsTest < ActiveSupport::TestCase
   end
 end
 
+class HelpersTypoControllerTest < ActiveSupport::TestCase
+  def setup
+    @autoload_paths = ActiveSupport::Dependencies.autoload_paths
+    ActiveSupport::Dependencies.autoload_paths = Array(HelpersTypoController.helpers_path)
+  end
+
+  def test_helper_typo_error_message
+    e = assert_raise(NameError) { HelpersTypoController.helper 'admin/users' }
+    assert_equal "Couldn't find Admin::UsersHelper, expected it to be defined in helpers/admin/users_helper.rb", e.message
+  end
+
+  def teardown
+    ActiveSupport::Dependencies.autoload_paths = @autoload_paths
+  end
+end
+
 class HelperTest < ActiveSupport::TestCase
   class TestController < ActionController::Base
     attr_accessor :delegate_attr
@@ -201,10 +223,10 @@ class HelperTest < ActiveSupport::TestCase
     # fun/pdf_helper.rb
     assert methods.include?(:foobar)
   end
-  
+
   def test_helper_proxy_config
     AllHelpersController.config.my_var = 'smth'
-    
+
     assert_equal 'smth', AllHelpersController.helpers.config.my_var
   end