rspec测试GET #index - 包含的预期集合

Question

我测试。，该索引操作'填充所有问题的数组。

require 'rails_helper' 

RSpec.describe QuestionsController, type: :controller do 
    describe 'GET #index' do 
    before do 
     @questions = FactoryGirl.create_list(:question, 2) 
     get :index 
    end 

    it 'populates an array of all questions' do 
     binding.pry 
     expect(assigns(:questions)).to match_array(@questions) 
    end 
    it 'renders index view' do 
     expect(response).to render_template(:index) 
    end 
    end 
end 

控制器/ questions_controller

class QuestionsController < ApplicationController 
    def index 
     @questions = Question.all   
    end 
end 

工厂/ questions.rb

FactoryGirl.define do 
    factory :question do 
    title "MyString" 
    body "MyText" 
    end 
end 

当运行测试显示错误：

1）QuestionsController GET #INDEX填充所有的阵列问题 失败/错误：期待（分配（：问题））。 match_array（@questions）

expected collection contained: 

[#<Question id: 37, title: "MyString", body: "MyText", created_at: "2016-10-31 19:37:12", updated_at:...: "MyString", body: "MyText", created_at: "2016-10-31 19:37:12", updated_at: "2016-10-31 19:37:12">] 
     actual collection contained: [#<Question id: 15, title: "MyString", body: "MyText", created_at: "2016-10-30 21:23:52", updated_at:...: "MyString", body: "MyText", created_at: "2016-10-31 19:37:12", updated_at: "2016-10-31 19:37:12">] 
     the extra elements were:  [#<Question id: 15, title: "MyString", body: "MyText", created_at: "2016-10-30 21:23:52", updated_at:...: "MyString", body: "MyText", created_at: "2016-10-30 21:23:52", updated_at: "2016-10-30 21:23:52">] 
# ./spec/controllers/questions_controller_spec.rb:12:in `block (3 levels) in <top (required)>' 

为什么不是集合中的相同元素？

Answer 1

你需要在db中创建问题吗？如果你正在测试一个@questions是越来越稀少，您可以存根的电话分贝，像

describe 'GET #index' do 
    before do 
    @questions = [FactoryGirl.build_stubbed(:question)] 
    allow(Question).to receive(:all).and_return(@questions) 
    get :index 
    end 

    it 'populates an array of all questions' do 
    expect(assigns(:questions)).to match_array(@questions) 
    end 
end 

，如果你只是想测试分配你并不需要创建实际的数据库记录。