public void CheckChooseDeliveryType()
{
Mock <IOrderRepository> repositoryMock = new Mock <IOrderRepository>();
ShopService ss = new ShopService(repositoryMock.Object);
var order = OrderObjectMother.CreateOrderWithNoItems();
string deliveryType = "newDeliveryType";
ss.ChooseDeliveryType(order, deliveryType);
Assert.AreEqual(order.DeliveryType, deliveryType);
}