Rspec，在Rails应用程序控制器中存根对象的存在

Question

我的应用程序控制器中有一个方法“ get_location_details”，在找到场所之后，每次操作之前都会调用该方法。 看起来像这样

  def get_venue 
    @venue = Venue.friendly.find(params[:venue_id])
  end 

  def get_location_details
    @venue_information = {
    opening_times: @venue.facility_with_opening_hours.any? ? venue.facility_with_opening_hours.first.opening_times_for_week(Date.today) : '',
    location:   {address1:   venue.address1, 
                 address2:   venue.address2, 
                 town:       venue.town, 
                 county:     venue.county, 
                 postcode:   venue.postcode},
    contact:    {email:      venue.email, 
                 telephone:  venue.telephone},
    social:     {facebook:   venue.facebook,
                 twitter:    venue.twitter}    
    }
  end

我想开始测试我。 输出； ii。 上下文（即不存在场所）。 我认为，为了实现这一目标，我需要保留场地的存在，而我似乎无法弄清楚该怎么做。

  describe "get_location_details" do 
    before do 
      test_hash = [{:day=>"Mon - Fri", :open=>"2001-01-01 06:30:00 +0000", :close=>"2001-01-01 22:00:00 +0000", :closed=>false},
                  {:day=>"Sat", :open=>"2001-01-01 08:00:00 +0000", :close=>"2001-01-01 19:00:00 +0000", :closed=>false},
                  {:day=>"Sun", :open=>"2001-01-01 08:00:00 +0000", :close=>"2001-01-01 17:00:00 +0000", :closed=>false}]
      allow(controller).to receive(:venue).and_return(venue)
      allow(venue).to receive(:facility_with_opening_hours).and_return(test_hash)
    end

    it "returns http success" do
      expect(controller.send(:get_location_details).is_a?(Hash)).to be_truthy
    end

  end 

但是我的测试一直失败

   undefined method `facility_with_opening_hours' for nil:NilClass

这表明该场所没有存根。 我如何存根场地？ 我在这里做错了什么？ 我经常参加应用程序控制器测试，但是我想掌握一下。 如果有人可以推荐任何进一步的阅读，将不胜感激。

非常感谢

Answer 1

我不确定您是否可以轻易在rspec中存根成员。 您可以为成员设置一个值，或者（最好）重构代码以从getter而不是成员中读取值：

def venue 
  @venue ||= Venue.friendly.find(params[:venue_id])
end 

def location_details
  @venue_information ||= {
    opening_times: venue.facility_with_opening_hours.any? ? venue.facility_with_opening_hours.first.opening_times_for_week(Date.today) : '',
    location:   {address1:   venue.address1, 
    address2:   venue.address2, 
    town:       venue.town, 
    county:     venue.county, 
    postcode:   venue.postcode},
    contact:    {email:      venue.email, 
             telephone:  venue.telephone},
    social:     {facebook:   venue.facebook,
             twitter:    venue.twitter}    
  }
end