elmah.ir-post114-code3.cs

[Test]
public void WhenAUserAttemptsToOrderAnItemWithAQuantityOfZeroThrowInvalidOrderException()
{
    //Arrange
    var shoppingCart = new ShoppingCart();
    shoppingCart.Items.Add(new ShoppingCartItem { ItemId = Guid.NewGuid(), Quantity = 0 });
    var customerId = Guid.NewGuid();
    var expectedOrderId = Guid.NewGuid();

    Mock.Arrange(() => _orderDataService.Save(Arg.IsAny<order>()))
      .Returns(expectedOrderId)
      .OccursOnce();

    //Act
    try
    {
      _orderService.PlaceOrder(customerId, shoppingCart);
    }
    catch(InvalidOrderException ex)
    {
      //Assert
      Mock.Assert(_orderDataService);
      Assert.Pass();
    }

    //Assert
    Assert.Fail();
}