static void Main(string[] args)
{
var carOrder = new Order();
var carItem = new OrderItem("Audi B4");
var alternativeCarItem = new OrderItem("Mitsubishi Lancer");
var orderItemProcessor = new OrderItemProcessor();
//return multiple results from function using out
carOrder.addOrderItem(carItem);
int carItemCount;
var orderItems = carOrder.getOrderItems(out carItemCount);
Console.WriteLine($"Order item count is {carItemCount}", carItemCount);
//swap two OrderItem instances using ref
printCarTitles("Before swap:", carItem.Title, alternativeCarItem.Title);
orderItemProcessor.swapOrderItems(ref carItem, ref alternativeCarItem);
printCarTitles("After swap:", carItem.Title, alternativeCarItem.Title);
//duplicateOrderItem receives a copy of object reference. original object does not change
var duplicateCarItem = orderItemProcessor.duplicateOrderItem(carItem);
var isSameObject = carItem.Equals(duplicateCarItem);
printCarComparisonResut(isSameObject, carItem.Title, duplicateCarItem.Title);
}
public void duplicatesOrderItems()
{
var carItem = new OrderItem("Audi B4");
var orderItemProcessor = new OrderItemProcessor();
var duplicateCarItem = orderItemProcessor.duplicateOrderItem(carItem);
Assert.AreNotEqual(carItem, duplicateCarItem);
}
public void swapsOrderItems()
{
var carItem = new OrderItem("Audi B4");
var alternativeCarItem = new OrderItem("Mitsubishi Lancer");
var orderItemProcessor = new OrderItemProcessor();
orderItemProcessor.swapOrderItems(ref carItem, ref alternativeCarItem);
Assert.AreEqual("Mitsubishi Lancer", carItem.Title);
Assert.AreEqual("Audi B4", alternativeCarItem.Title);
}
public void addOrderItems()
{
var order = new Order();
var orderItem = new OrderItem("Volvo XC90");
var anotherOrderItem = new OrderItem("Mazda 6");
order.addOrderItem(orderItem);
order.addOrderItem(anotherOrderItem);
int itemCount;
var items = order.getOrderItems(out itemCount);
Assert.AreEqual(2, itemCount);
}
public void swapOrderItems(ref OrderItem item, ref OrderItem alternativeItem)
{
var temp = item;
item = alternativeItem;
alternativeItem = temp;
}
public OrderItem duplicateOrderItem(OrderItem item)
{
var title = item.Title;
item = new OrderItem("new " + title);
return item;
}
public void addOrderItem(OrderItem item)
{
orderItems.Add(item);
}
