展望为找不工作，而是期望的find_by_id是

Question

我有这样的控制器代码：

# GET /cardsets/1 
def show 
    @cardset = current_user.cardsets.find_by_id(params[:id]) 
end 

这RSpec的测试代码（与摩卡嘲笑）：

# GET Show 
context "on get to show" do 
    it "should assign cardset" do 
    @cardset = Factory(:cardset) 
    @profile = @cardset.profile 

    @profile.cardsets.expects(:find).once.returns(@cardset) 
    get :show, :id => @cardset.id 
    assigns[:cardset].should_not be_nil 
    end 
end 

此测试失败：

2) 
Mocha::ExpectationError in 'CardsetsController for a logged in user on get to show should assign cardset' 
not all expectations were satisfied 
unsatisfied expectations: 
- expected exactly once, not yet invoked: [#<Cardset:0x1032bb660>].find(any_parameters) 
satisfied expectations: 
- allowed any number of times, not yet invoked: ApplicationController.require_user(any_parameters) 
- allowed any number of times, already invoked twice:  #<CardsetsController:0x10336c578>.current_user(any_parameters) 

如果我改变预期到：

@profile.cardsets.expects(:find_by_id).once.returns(@cardset) 

然后测试通过，为什么这会通过find_by_id而找不到？

Answer 1

我认为这是因为find和find_by_id实际上是不同的消息。您的控制器使用find_by_id，但您将消息期望设置为寻找find。