Hameds

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

    //Act
    _orderService.PlaceOrder(customerId, shoppingCart);

Hameds

using System;
namespace TddStore.Core
{
  public interface ICustomerService
  {
    Customer GetCustomer(Guid customerId);
  }
}

Hameds

using System;
    namespace TddStore.Core
    {
      public class Customer
      {
        public Guid Id { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public Address ShippingAddress { get; private set; }
    

Hameds

[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>()))

Hameds

[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>()))

Hameds

 [Test]
[ExpectedException(typeof(InvalidOrderException))]
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();

Hameds

[Test]
[ExpectedException(typeof(InvalidOrderException))]
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();

Hameds

 public Guid PlaceOrder(Guid customerId, ShoppingCart shoppingCart)
{
  foreach (var item in shoppingCart.Items)
  {
    if (item.Quantity == 0)
    {
      throw new InvalidOrderException();
    }
  }
  var order = new Order();

Hameds

[Test]
[ExpectedException(typeof(InvalidOrderException))]
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();

Hameds

[Test]
[ExpectedException(typeof(InvalidOrderException))]
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();