title: Rails 4 and Rspec - generate controller test
body: <p>I have an API that has many controllers and models.</p>
  
  <p>I installed Rspec and every new resource I create, the corresponding test files are created automatically.</p>
  
  <p>Is there a way to generate these files for all others old resources including REST tests?</p>
  
  <p>For instance, I have a file costumers_controller.rb created before I install Rspec, is there a way to generate the default file costumers_controller_spec.rb?</p>