大域的なperform_cachingの値にかかわらずcaches_actionのテストをする

foo_controller.rb

class FooController < ApplicationController
  caches_action :index

  def index
    render :text => Time.now
  end
end

foo_controller_spec.rb

require 'spec_helper'

describe FooController do
  describe "GET 'index'" do
    before(:all) do
      request.host = 'example.com'
    end

    around do |example|
      ActionController::Base.cache_store.clear
      old_perform_caching = ActionController::Base.perform_caching
      ActionController::Base.perform_caching = perform_caching
      reload_controller_class FooController
      old_controller = @controller
      @controller = FooController.new

      example.run

      @controller = old_controller
      ActionController::Base.perform_caching = old_perform_caching
      reload_controller_class FooController
      ActionController::Base.cache_store.clear
    end

    describe "caching" do
      let(:perform_caching) { true }

      before do
        get 'index'
      end

      subject { controller.fragment_exist?('example.com/foo') }
      it { should be_true }
    end

    describe "without caching" do
      let(:perform_caching) { false }

      before do
        get 'index'
      end

      subject { controller.fragment_exist?('example.com/foo') }
      it { should be_false }
    end
  end
end

spec_helper.rb

#  :
# (略)
#  :

def reload_controller_class(controller_class)
  Object.send(:remove_const, controller_class.to_s)
  load Rails.root.join("app/controllers/#{controller_class.to_s.underscore}.rb")
end

$ rspec  -d spec/controllers/foo_controller_spec.rb
..

Finished in 0.09546 seconds
2 examples, 0 failures