@Test
public void coffee_with_sugar_not_enough_money() {

   ICoffeeMachine coffeeMachine = new CoffeeMachine();
   IRequest request = DrinkFactory.getInstance().newCoffeeRequestBuilder().withSugar(1).build();
   String result = coffeeMachine.process(request, 0.4);
   assertEquals("Not enough money: 0.2 euros still missing", result);
}