RSpec：測試rescue_from

Question

我如何測試rescue_from是RSpec？我想確保如果出現其中一個例外情況，控制器正確設置閃存並執行重定向。有沒有辦法模擬異常？

rescue_from PageAccessDenied do 
    flash[:alert] = "You do not have the necessary roles to access this page" 
    redirect_to root_url 
    end 

    rescue_from CanCan::AccessDenied do |exception| 
    flash[:alert] = exception.message 
    redirect_to root_url 
    end 

Answer 1

假設你有一個authorize!方法引發異常，你應該能夠做這樣的事情：

describe "rescue_from exceptions" do 
    it "rescues from PageAccessDenied" do 
     controller.stub(:authorize!) { raise PageAccessDenied } 
     get :index 
     response.should redirect_to("/") 
     flash[:alert].should == "You do not have the necessary roles to access this page" 
    end 
    end