1 files changed, 29 insertions, 0 deletions
diff --git a/railties/test/application/loading_test.rb b/railties/test/application/loading_test.rb
index 4f30f30f95..85066210f3 100644
--- a/railties/test/application/loading_test.rb
+++ b/railties/test/application/loading_test.rb
@@ -33,6 +33,35 @@ class LoadingTest < ActiveSupport::TestCase
     assert_equal 'omg', p.title
   end
 
+  test "concerns in app are autoloaded" do
+    app_file "app/controllers/concerns/trackable.rb", <<-CONCERN
+      module Trackable
+      end
+    CONCERN
+
+    app_file "app/mailers/concerns/email_loggable.rb", <<-CONCERN
+      module EmailLoggable
+      end
+    CONCERN
+
+    app_file "app/models/concerns/orderable.rb", <<-CONCERN
+      module Orderable
+      end
+    CONCERN
+
+    app_file "app/validators/concerns/matchable.rb", <<-CONCERN
+      module Matchable
+      end
+    CONCERN
+
+    require "#{rails_root}/config/environment"
+
+    assert_nothing_raised(NameError) { Trackable }
+    assert_nothing_raised(NameError) { EmailLoggable }
+    assert_nothing_raised(NameError) { Orderable }
+    assert_nothing_raised(NameError) { Matchable }
+  end
+
   test "models without table do not panic on scope definitions when loaded" do
     app_file "app/models/user.rb", <<-MODEL
       class User < ActiveRecord::Base