elmah.ir-post107-code7.cs

[Test]
public void WhenUserPlacesACorrectOrderThenAnOrderNumberShouldBeReturned()
{
  //Arrange
   var shoppingCart = new ShoppingCart();
   shoppingCart.Items.Add(new ShoppingCartItem { ItemId = Guid.NewGuid(), Quantity = 1 });
   var customerId = Guid.NewGuid();
   var expectedOrderId = Guid.NewGuid();

   var orderDataService = Mock.Create<iorderdataservice>();
   Mock.Arrange(() => orderDataService.Save(Arg.IsAny<order>())).Returns(expectedOrderId);
   OrderService orderService = new OrderService(orderDataService);

  //Act
   var result = orderService.PlaceOrder(customerId, shoppingCart);

  //Assert
   Assert.AreEqual(expectedOrderId, result);
}