在Rails 3.1中用Rspec和Factory girl測試嵌套的資源控制器

Question

我在用戶下有一個嵌套的資源專用。

我的routes.rb看起來像

resources :users do 
    resources :specialties do 
    end 
    end 

我factories.rb看起來像

Factory.define :user do |f| 
    f.description { Populator.sentences(1..3) } 
    f.experience { Populator.sentences(1..5) } 
    f.tag_list { create_tags } 
end 

Factory.define :specialty do |f| 
    f.association :user 
    specialties = CategoryType.valuesForTest 
    f.sequence(:category) { |i| specialties[i%specialties.length] } 
    f.description { Populator.sentences(1..5) } 
    f.rate 150.0 
    f.position { Populator.sentences(1) } 
    f.company { Populator.sentences(1) } 
    f.tag_list { create_tags } 
end 

我Specialties_controller.rb看起來像

class SpecialtiesController < ApplicationController 

def index 
    @user = User.find(params[:user_id]) 
    @specialties = @user.specialties 
    respond_to do |format| 
     format.html # index.html.erb 
     format.json { render json: @specialties } 
    end 
    end 

我specialties_controller_spec.rb看起來像

require 'spec_helper' 

describe SpecialtiesController do 
    render_views 

    describe "GET 'index'" do 
    before do 
     @user = Factory.create(:user) 
     @specialty = Factory.create(:specialty, :user => @user) 
     @user.stub!(:specialty).and_return(@specialty) 
     User.stub!(:find).and_return(@user) 
    end 

    def do_get 
     get :index, :user_id => @user.id 
    end 

    it "should render index template" do 
     do_get 
     response.should render_template('index') 
    end 

    it "should find user with params[:user_id]" do 
     User.should_receive(:find).with(@user.id.to_s).and_return(@user) 
     do_get 
    end 

    it "should get user's specialties" do 
     @user.should_receive(:specialty).and_return(@specialty) 
     do_get 
    end 
    end 
end 

前兩個測試通過，但最後的測試失敗，出現錯誤消息

Failure/Error: @user.should_receive(:specialty).and_return(@specialty) 
     (#<User:0x007fe4913296a0>).specialty(any args) 
      expected: 1 time 
      received: 0 times 

沒有任何人有一個想法，這個錯誤是什麼手段，以及如何要解決這個問題？我看過類似的帖子，在代碼中找不到錯誤。提前致謝。

Answer 1

@user.should_receive(:specialty).and_return(@specialty) 

specialty是一個一對多的關係，應該是複數：specialties。事實上，你在你的控制器中：

@specialties = @user.specialties