public void GetAllCustomersWithOrders_ShouldReturnCustomersAndOrders()
{
// Arrange.
var customerOne = CustomerDataHelper.Add(GetCustomer("UK"));
var orderOne = OrderDataHelper.AddOrder(GetOrder(customerOne.CustomerId));
var orderTwo = OrderDataHelper.AddOrder(GetOrder(customerOne.CustomerId));
var customerTwo = CustomerDataHelper.Add(GetCustomer("FR"));
var orderThree = OrderDataHelper.AddOrder(GetOrder(customerTwo.CustomerId));
var customerOrderService = _container.Resolve <ICustomerOrderService>();
// Act.
var results = customerOrderService.GetAllCustomerWithOrders();
var customerOneResult = results.First(c => c.Customer.CustomerId == customerOne.CustomerId);
var customerTwoResult = results.First(c => c.Customer.CustomerId == customerTwo.CustomerId);
// Assert.
Assert.AreEqual(2, customerOneResult.Orders.Count());
Assert.AreEqual(1, customerTwoResult.Orders.Count());
Assert.IsTrue(customerOneResult.Orders.Any(o => o.OrderId == orderOne.OrderId));
Assert.IsTrue(customerOneResult.Orders.Any(o => o.OrderId == orderTwo.OrderId));
Assert.IsTrue(customerTwoResult.Orders.Any(o => o.OrderId == orderThree.OrderId));
}