Rails 3.1插件gem，虚拟测试应用，rspec

So Rails 3.1 comes with a little-known handy "rails g plugin new" generator, which gives you a skeleton suitable for a rails gem plugin. [https://guides.rubyonrails.org/plugins.html#or-generate-a-gemified-plugin]So Rails 3.1 comes with a little-known handy "r