gem 'sprockets'     #   提供一个静态文件处理的pipeline编译环境.同时它也是一个基于rack的rack app.

gem 'shoulda-matchers'

gem 'factory_girl_rails'   # 提供假数据

gem 'cucumber-rails', :require => false

gem 'database_cleaner'

gem 'capybara'

gem 'selenium-webdriver'

gem 'uglifier'    #      Use Uglifier as compressor for JavaScript assets  

gem 'turbolinks', github: 'rails/turbolinks'        #加速页面渲染

gem 'exception_notification'

gem 'dropzonejs-rails'

，