public void PersonEatsPie_MealRegistered()
        {
            var person = new Person();

            person.Eat(pie);

            Assert.AreEqual(1, person.NumberOfMealsEaten);
        }
        public void PersonDrinks250gMilk_150kcalReturned()
        {
            var person = new Person();
            double expected = 150.5;

            person.Eat(largeGlassOfMilk);

            Assert.AreEqual(expected, person.EnergyIntake);
        }
        public void PersonDrinks100gMilk_60kcalReturned()
        {
            var person = new Person();
            double expected = 60.2;

            person.Eat(glassOfMilk);

            Assert.AreEqual(expected, person.EnergyIntake);
        }