internal static void ExecuteDecorator()
{
//Intent
// • Attach additional responsibilities to an object dynamically.
// Decorators provide a flexible alternative to subclassing for extending
// functionality.
// • Client - specified embellishment of a core object by recursively
// wrapping it.
// • Wrapping a gift, putting it in a box, and wrapping the box.
//Problem
// You want to add behavior or state to individual objects at run-time.
// Inheritance is not feasible because it is static and applies to an entire
// class.
Beverage beverage = new Cream(new Cream(new Espresso()));
Beverage beverage2 = new Mocha(new Milk(new Americano()));
Console.WriteLine(String.Format($"Beverage: {beverage.GetName()}"));
Console.WriteLine(String.Format($"Cost: {beverage.GetCost()}"));
Console.WriteLine(String.Format($"Beverage: {beverage2.GetName()}"));
Console.WriteLine(String.Format($"Cost: {beverage2.GetCost()}"));
}
public void CreamCostTest()
{
CoffeeMachine coffee_machine = new Coffee();
coffee_machine = new Cream(coffee_machine);
int expected = 57;
int actual;
actual = coffee_machine.GetCost();
Assert.AreEqual(expected, actual);
}
static void Main(string[] args)
{
{
var latte = new Latte(LatteType.Double);
var cinnamon = new Cinnamon(latte);
var lemon = new Lemon(cinnamon, 2);
var iceCubes = new IceCubes(lemon, 2, IceCubeType.Dry);
var beverage = new ChocolateCrumbs(iceCubes, 2);
Console.WriteLine(beverage.GetDescription() + " costs " + beverage.GetCost());
}
{
var beverage =
new ChocolateCrumbs( // Внешний слой: шоколадная крошка
new IceCubes( // | под нею - кубики льда
new Lemon( // | | еще ниже лимон
new Cinnamon( // | | | слоем ниже - корица
new Latte(LatteType.Standart)), // | | | в самом сердце - Латте
2), // | | 2 дольки лимона
2, IceCubeType.Dry), // | 2 кубика сухого льда
2); // 2 грамма шоколадной крошки
Console.WriteLine(beverage.GetDescription() + " costs " + beverage.GetCost());
}
{
var capuccino = new Cappuccino(CappuccinoType.Standart);
var chocolateSlice = new ChocolateSlice(capuccino, 6);
var liquor = new Liquor(chocolateSlice, LiquorType.Nut);
var beverage = new Cream(liquor);
Console.WriteLine(beverage.GetDescription() + " costs " + beverage.GetCost());
}
{
var milkshake = new Milkshake(MilkshakeType.Big);
var chocolateSlice = new ChocolateSlice(milkshake, 4);
var liquor = new Liquor(chocolateSlice, LiquorType.Chocolate);
var beverage = new Cream(liquor);
Console.WriteLine(beverage.GetDescription() + " costs " + beverage.GetCost());
}
}