RSpec：测试rescue_from

Question

如何测试rescue_from是RSpec？我想确保如果引发一个例外，控制器正确设置闪存并进行重定向。有没有办法模拟异常？

  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

假设您有authorize!方法引发异常，您应该可以执行以下操作：

  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