public void Decorator_NewFunctionnality()
        {
            //Arrange
            var chocolat = new WithSugar(new Chocolat());

            //Act
            var message = chocolat.NewFunctionnality();

            //Assert
            Assert.Equal("hello", message);
        }
        public void Decorator_Chocolat_With_Sugar()
        {
            //Arrange
            var chocolat = new WithSugar(new Chocolat());

            //Act
            var cost        = chocolat.GetCost();
            var description = chocolat.GetDescription();

            //Assert
            Assert.Equal(3.99, cost);
            Assert.Equal("Chocolat, sugar", description);
        }