Rspec，在Rails應用程序控制器中存根對象的存在

Question

我的應用程序控制器中有一個方法“ get_location_details”，在找到場所之后，每次操作之前都會調用該方法。 看起來像這樣

  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

我想開始測試我。 輸出； ii。 上下文（即不存在場所）。 我認為，為了實現這一目標，我需要保留場地的存在，而我似乎無法弄清楚該怎么做。

  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 

但是我的測試一直失敗

   undefined method `facility_with_opening_hours' for nil:NilClass

這表明該場所沒有存根。 我如何存根場地？ 我在這里做錯了什么？ 我經常參加應用程序控制器測試，但是我想掌握一下。 如果有人可以推薦任何進一步的閱讀，將不勝感激。

非常感謝

Answer 1

我不確定您是否可以輕易在rspec中存根成員。 您可以為成員設置一個值，或者（最好）重構代碼以從getter而不是成員中讀取值：

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