使用Resque排隊進行集成測試或模擬？

Question

你會如何測試這個類？你會把它與Resque整合起來，並檢查這個工作是否放在隊列中，或者你是否會嘲笑它，如果你想嘲笑它，你會如何避免重複代碼示例中顯示的代碼。

class BookingReminderEnqueuer 
    def initialize(user, booking, worker = BookingReminder) 
    @user, @booking, @worker = user, booking, worker 
    end 

    def enqueue 
    Resque.enqueue_at(
     remind_user_at, 
     @worker, 
     booking_id: @booking.id, 
     user_id: @user.id 
    ) if @booking.remind_user? 
    end 

    private 
    def remind_user_at 
    @booking.start_time - 6.hours 
    end 
end 

require 'spec_helper' 
describe BookingReminderEnqueuer 
    describe "#enqueue" do 
    context "when the user should have a reminder" do 
     it "enqueues the reminder" do 
     booking.stub(:remind_user?) { true } 
     Resque.should_receive(:enqueue_at).with(
      booking.start_time - 6.hours, 
      BookingReminder, 
      booking_id: booking.id, 
      user_id: user.id 
     ).once 
     booking_reminder_enqueuer.enqueue 
     end 
    end 

    context "when the user shouldn't have a reminder" do 
     it "does not enqueue the reminder" do 
     booking.stub(:remind_user?) { false } 
     Resque.should_not_receive(:enqueue_at) 
     end 
    end 
    end 
end 

Answer 1

我會用像fakeredis這樣的gem創建一個測試redis db。這將創建一個隔離的內存Redis實例，用於測試，可以在測試運行周圍清除。然後，你可以驗證工作與正確的參數與嘲諷的排隊方法（因爲得到排隊參數正常工作正常排隊的是這種方法的心臟。

# Gemfile 
    group :test do 
     gem "rspec" 
     gem "fakeredis", :require => "fakeredis/rspec" 
    end 


    # Spec 
    describe BookingReminderEnqueuer 
     describe "#enqueue" do 
     context "when the user should have a reminder" do 
      it "enqueues the reminder" do 
      booking.stub(:remind_user?) { true } 
      booking_reminder_enqueuer.enqueue 
      resque_job = Resque.peek(:queue_name) 
      resque_job.should be_present 
      # add assertions about job content/scheduling here 
      end 
     end 
     ... 
    end 
    end