1 files changed, 66 insertions, 0 deletions
diff --git a/railties/test/application/mailer_previews_test.rb b/railties/test/application/mailer_previews_test.rb
index c588fd7012..55e917c3ec 100644
--- a/railties/test/application/mailer_previews_test.rb
+++ b/railties/test/application/mailer_previews_test.rb
@@ -26,6 +26,20 @@ module ApplicationTests
       assert_equal 404, last_response.status
     end
 
+    test "/rails/mailers is accessible with correct configuraiton" do
+      add_to_config "config.action_mailer.show_previews = true"
+      app("production")
+      get "/rails/mailers"
+      assert_equal 200, last_response.status
+    end
+
+    test "/rails/mailers is not accessible with show_previews = false" do
+      add_to_config "config.action_mailer.show_previews = false"
+      app("development")
+      get "/rails/mailers"
+      assert_equal 404, last_response.status
+    end
+
     test "mailer previews are loaded from the default preview_path" do
       mailer 'notifier', <<-RUBY
         class Notifier < ActionMailer::Base
@@ -403,6 +417,58 @@ module ApplicationTests
       assert_match '<option selected value="?part=text%2Fplain">View as plain-text email</option>', last_response.body
     end
 
+    test "*_path helpers emit a deprecation" do
+
+      app_file "config/routes.rb", <<-RUBY
+        Rails.application.routes.draw do
+          get 'foo', to: 'foo#index'
+        end
+      RUBY
+
+      mailer 'notifier', <<-RUBY
+        class Notifier < ActionMailer::Base
+          default from: "from@example.com"
+
+          def path_in_view
+            mail to: "to@example.org"
+          end
+
+          def path_in_mailer
+            @url = foo_path
+            mail to: "to@example.org"
+          end
+        end
+      RUBY
+
+      html_template 'notifier/path_in_view', "<%= link_to 'foo', foo_path %>"
+
+      mailer_preview 'notifier', <<-RUBY
+        class NotifierPreview < ActionMailer::Preview
+          def path_in_view
+            Notifier.path_in_view
+          end
+
+          def path_in_mailer
+            Notifier.path_in_mailer
+          end
+        end
+      RUBY
+
+      app('development')
+
+      assert_deprecated do
+        get "/rails/mailers/notifier/path_in_view.html"
+        assert_equal 200, last_response.status
+      end
+
+      html_template 'notifier/path_in_mailer', "No ERB in here"
+
+      assert_deprecated do
+        get "/rails/mailers/notifier/path_in_mailer.html"
+        assert_equal 200, last_response.status
+      end
+    end
+
     private
       def build_app
         super