mocha 是否在存根（Rails）中运行代码？

Question

我是 tdd 和存根的新手。当我存根一个方法时，我假设该方法中的任何代码都不会被执行？我试图伪造引发异常的方法，但我的测试结果表明该方法中的代码正在执行而不是被绕过。

谁能帮忙解释一下原因？

我的存根是

@logged_in_user.subscription.stubs(:stop_auto_renew).raises(:RuntimeError)

在上下文中

test "canceling subscription should handle exception raised by spreedly" do
    login_larry_active
    @logged_in_user.subscription.stubs(:stop_auto_renew).raises(:RuntimeError)
    delete :destroy, {:user_id => @logged_in_user.id}
    assert flash[:notice]
    assert_redirected_to :controller => :dashboard, :action => :welcome
end

这是我试图存根的模型中的方法。 Spreedly::Subscriber 通常从网络上获取内容。

class Subscription < ActiveRecord::Base
    protected
    def stop_auto_renew
        Spreedly::Subscriber.find(self.user.id).stop_auto_renew()
    end
end

-

class SubscriptionsController < ApplicationController    
    def destroy
        user = User.find(params[:user_id])
        if user
            begin
                user.subscription.stop_auto_renew
            rescue RuntimeError
                #log something and email admin
                ldb("Spreedly cant process stop_auto_renew for user id: #{user.id}")
                #email admin
            end
            flash[:notice] = "You have successfully cancelled your subscription and will take effect at the end of your current billing month"
        end    
        redirect_to :controller => :dashboard, :action => :welcome
    end
end

测试错误是

4) Error:
test_canceling_subscription_should_handle_exception_raised_by_spreedly(SubscriptionsControllerTest):
NoMethodError: You have a nil object when you didn't expect it!
The error occurred while evaluating nil.stop_auto_renew
    app/models/subscription.rb:18:in `stop_auto_renew'
    app/controllers/subscriptions_controller.rb:31:in `destroy'
    /test/functional/subscriptions_controller_test.rb:42:in `test_canceling_subscription_should_handle_exception_raised_by_spreedly'

Answer 1

我可能是错的，但我的猜测是您已经在对象 @logged_in_user.subscription 上存根方法 :stop_auto_renew（我假设用户有订阅？）但是实际上调用是在从User.find(params[:user_id]) 在您的控制器中。

也许试试Subscription.any_instance.stubs(:stop_auto_renew)...，它应该存根订阅的所有实例。