rails/rails — pull request #7336 by route (2012-08-12 09:45:24+00:00)
Title: Tests for assets were extracted to sprockets-rails and now they are unnecessary

Here it is https://github.com/rails/sprockets-rails/blob/master/test/assets_debugging_test.rb and https://github.com/rails/sprockets-rails/blob/master/test/assets_test.rb
/cc @guilleiguaran