whip.ts

class Whip extends BeverageDecorator {
  private beverage: Beverage;
  constructor(beverage: Beverage) {
    super();
    this.beverage = beverage;
  }
  getDescription() {
    return this.beverage.getDescription() + ", 휘핑";
  }
  cost() {
    return this.beverage.cost() + 1000;
  }
}