public void Testing_PriceCalculation()
        {
            //testing for price calculation
            var sut = new OrderModel();

            sut.Pizzas = new List <PizzaModel>();
            for (int i = 0; i < 10; i++)
            {
                sut.Pizzas.Add(
                    new PizzaModel()
                {
                    Crust = new CrustModel()
                    {
                        Price = 5
                    },
                    Size = new SizeModel()
                    {
                        Price = 7.5m
                    },
                    Toppings = new List <ToppingModel>()
                    {
                        new ToppingModel()
                        {
                            Price = 0.25m
                        },
                        new ToppingModel()
                        {
                            Price = 0.5m
                        }
                    }
                }
                    );
            }

            decimal price = 132.50m;

            Assert.True(sut.CalculatePrice() == price);
        }