public void ToBill_WithFoodProduct_BillListsCaloriesAndPriceFromFoodProduct()
{
int calories = 250;
int price = 12;
var orderTimeStamp = DateTime.Parse("2009-06-01T13:45:30");
var expectedBill = new Bill()
{
Price = price,
Calories = calories,
OrderedAt = orderTimeStamp
};
var foodProductMock = new Mock <IFoodProduct>();
foodProductMock.Setup(p => p.GetCalories()).Returns(calories);
foodProductMock.Setup(p => p.GetPrice()).Returns(price);
var burger = new Burger(foodProductMock.Object, () => orderTimeStamp);
var bill = burger.ToBill();
bill.Should().BeEquivalentTo(expectedBill);
}