public void Should_be_added_to_the_cost_of_a_beverage()
        {
            var condiment = new DarkRoastWithWhip(new TestCoffee()
            {
                TestableCost = 3.50
            });

            Assert.That(condiment.Cost(), Is.EqualTo(3.75));
        }
        public void Should_be_appended_to_the_coffee_description()
        {
            var testCoffee = new TestCoffee()
            {
                TestableCost = 3.50, Description = "Test coffee description"
            };
            var condiment = new DarkRoastWithWhip(testCoffee);

            Assert.That(condiment.GetDescription, Is.EqualTo("Test coffee description with Whipped Cream"));
        }