Ruby on Rails3でRSpecを使ったコントローラのテストのコード

index_controller_spec.rb

require 'spec_helper'

describe IndexController do

  describe 'GET "popular"' do
    context :html, :response do
      before { get :popular }
      subject { response }
      it { should be_success }
    end
    context :atom, :response do
      before { get :popular, format: :atom }
      subject { response }
      it { should be_success }
    end
  end

  describe 'POST "find" with empty url' do
    context 'without XMLHttpRequest' do
      before { post :find, url: '' }
      describe :response do
        subject { response }
        it { should be_redirect }
        describe :redirect_to do
          subject { URI.parse(response.redirect_url).request_uri }
          it { should == '/' }
        end
      end
      describe :flash, :notice do
        subject { request.session['flash'][:notice] }
        it do
          should == 'Sorry, the user could not find because of an error.'
        end
      end
    end      

    context 'with XMLHttpRequest' do
      before { xhr :post, :find, url: '' }
      describe :response, :body do
        subject { response.body }
        it do
          text = 'Sorry, the user id could not find because of an error.'
          javascript = "alert('#{text}')"
          should == javascript
        end
      end
    end
  end

end