public void TestAdd_Items()
{
//创建两个商品
var product1 = new Product(_random.Next(999999999))
{
Name = "dotnet", Code = "1", Price = 10
};
_productRepository.Add(product1);
var product2 = new Product(_random.Next(999999999))
{
Name = "dotnetcore", Code = "2", Price = 20
};
_productRepository.Add(product2);
_unitOfWork.Commit();
_unitOfWork.ClearCache();
//创建订单，添加两个订单明细
Guid orderId = Guid.NewGuid();
var order = new Order(orderId)
{
Name = "Order", Code = "123"
};
order.AddItem(product1, 2);
order.AddItem(product2, 3);
_orderRepository.Add(order);
_unitOfWork.Commit();
_unitOfWork.ClearCache();
//验证
var result = _orderRepository.Find().Include(t => t.Items).FirstOrDefault(t => t.Id == orderId);
Assert.Equal("123", result.Code);
Assert.Equal(2, result.Items.Count);
//从外部无法通过导航属性添加订单明细，必须调用AddItem方法
var item = new OrderItem(Guid.NewGuid(), result);
item.Booking(product1, 2);
var items = result.Items.ToList();
items.Add(item);
_unitOfWork.Commit();
_unitOfWork.ClearCache();
result = _orderRepository.Find().Include(t => t.Items).FirstOrDefault(t => t.Id == orderId);
Assert.Equal(2, result.Items.Count);
}