//
void UnitTest()
{
// 物件
ConcreteComponent theComponent = new ConcreteComponent();
// 增加Decorator
ConcreteDecoratorA theDecoratorA = new ConcreteDecoratorA(theComponent);
theDecoratorA.Operator();
ConcreteDecoratorB theDecoratorB = new ConcreteDecoratorB(theComponent);
theDecoratorB.Operator();
// 再增加一層
ConcreteDecoratorB theDecoratorB2 = new ConcreteDecoratorB(theDecoratorA);
theDecoratorB2.Operator();
}