需要重新加載current_cart獲得測試通過

Question

我測試我的網上商店應用使用RSpec，這裏是我在做什麼：

# spec/controllers/line_items_controller_spec.rb 
require 'spec_helper' 

describe LineItemsController do 

    describe "POST 'create'" do 
    before do 
     @current_cart = Factory(:cart) 
     controller.stub!(:current_cart).and_return(@current_cart) 
    end 

    it 'should merge two same line_items into one' do 
     @product = Factory(:product, :name => "Tee") 
     post 'create', {:product_id => @product.id} 
     post 'create', {:product_id => @product.id} 

     assert LineItem.count.should == 1 
     assert LineItem.first.quantity.should == 2 
    end 
    end  
end 

# app/controllers/line_items_controller.rb 
class LineItemsController < ApplicationController 
    def create   
    current_cart.line_items.each do |line_item| 
     if line_item.product_id == params[:product_id] 
     line_item.quantity += 1 
     if line_item.save 
      render :text => "success" 
     else 
      render :text => "failed" 
     end 
     return 
     end 
    end 

    @line_item = current_cart.line_items.new(:product_id => params[:product_id]) 

    if @line_item.save 
     render :text => "success" 
    else 
     render :text => "failed" 
    end 
    end 
end 

現在的問題是，它從不加起來有兩個line_items因爲第二次我進入line_items_controller#create，current_cart.line_items是[]，我已經運行current_cart.reload來讓測試通過，任何想法出了什麼問題？

Answer 1

這很可能是因爲你已經剔除了控制器的current_cart，它總是返回沒有line_items的Factory(:cart)。

如果你正在測試current_cart本身，最好不要將它存根。

另外，是@line_item.save調用返回true？