rescue_from CanCan::AccessDenied do |exception|
    flash[:alert] = t(:access_denied)
    if (current_user) then
      redirect_to root_url
    else
      session[:direct_redirect] = request.url
      redirect_to new_user_session_url
    end
  end

我想写一些规范,以确保功能的工作.我把测试放在spec / controller / application_controller_spec.rb中,图中我应该写一些如：

it "should redirect to the root url" do
    controller.stub(:authorize!) { raise CanCan::AccessDenied }
    get :index
    response.should redirect_to(root_url)
  end

问题是get：index行.该规则返回一个’no route matches controller =>应用程序“错误,”公平“,我想,并尝试路由到不同的控制器.尝试是：

* get :controller => 'purchases',:action => :index
* get purchases_url
* get '/purchases/'

所有这些都被解释为“应用程序”控制器下的动作.

那么,如何在rspec中路由控制器,除了规范写入的控制器？