Groovy Spock单元测试抛出NullPointerException，因为mock对象为null

Question

我正在为一个处理订单和设置完成的订单准备发货的类编写一些测试。为客户检索订单，并使用已完成订单的订单状态来完成处理。然而，当我运行测试时，它们失败了，说“不能在空对象上获得completedLines...”从错误中可以清楚地看出OrderStatus对象为NULL。但是，我在创建测试时设置了它，如下所示

ordersService.getStatus(orders) >> orderStatus

   OrdersService ordersService
   DiscountService discountService
   ShippingService shippingService


  Order getCustomerOrder(Long customerId) {
    List<Order> orders = 
          ordersService.retrieveOrderWithDiscount(customerId);
    List<LoyaltyDiscount> discounts = 
        discountService.getDiscounts(customerId,orders);
    OrderStatus orderStatus = ordersService.getStatus(orders);

  shippingService.processCompletedOrders(orderStatus.completedLines,orders);

    }



 class OrderSpecification extends Specification {
    OrdersService ordersService
    DiscountService discountService
    ShippingService shippingService

   def setup(){
     ordersService = Mock(OrdersService)
     discountService=  Mock(DiscountService)
     shippingService = Mock(ShippingService)
   }

   def 'completed orders with discounts should be shipped' (){
      given:
        long id =12334
        List <Order> orders = .. createOrders()
        OrderStatus orderStatus = createOrderStatus()
        ordersService.retrieveOrderWithDiscount(12345) >> orders
        ordersService.getStatus(orders) >> orderStatus
        shippingService.processCompletedOrders(orderStatus.completedLines,orders)
     ... rest omitted
   }

 }

Answer 1

我想通了，这次测试没有失败，另一次是。