ruby-on-rails - Rspec:如何 stub 私有(private)方法？

Question

这是错误:

private method `desc' called for #<Array:0x0000010532e280>

规范:

describe SubjectsController do  
  before(:each) do
    @subject = mock_model(Subject)
  end

    describe "#0002 - GET #index" do
    before(:each) do        
      subjects = [@subject, mock_model(Subject), mock_model(Subject)]
      Subject.stub!(:all).and_return(subjects)
      Subject.all.stub!(:desc).and_return(subjects)
      get :index
    end

    it { response.should be_success }
    it { response.should render_template("index") }
  end
end

和 Controller :

def index
  @subjects = Subject.all(conditions: {company_id: current_user.company.id}).desc(:created_at)
end

我不知道如何解决这个问题，有人可以帮我吗？
您能否就如何测试这种方法给我建议？
谢谢。

Answer 1

这比我更喜欢的 mock 和链接，但是，你可以这样做:

subjects = [...]
desc_mock = double("desc order mock")
desc_mock.should_receive(:desc).with(:created_at).and_return(subjects)

conditions = {...}
Subject.should_receive(:all).with(conditions).and_return(desc_mock)

您还可以通过将查询移动到带有一些参数的命名范围中来大大简化这一点。然后，您的测试可以验证 Subject 收到了您的范围，其中包含正确的参数，例如:

Subject.should_receive(:user_company).with(current_user.id).and_return(subjects)