public void ShouldCopy()
{
//Arrange
Toppings initial = new Toppings();
IToppings multiple = initial.Add(Topping.Mushroom).Add(Topping.Mozzarella);
IToppings clone = multiple.Copy();
//Act
IToppings removed = multiple.Remove(Topping.Mushroom);
//Assert
removed.Cost(new Money(10)).Should().Be(new Money(1));
clone.Cost(new Money(10)).Should().Be(new Money(2));
}
public ICalzone As(ICalzoneType calzoneType) => calzoneType.Create(_toppings.Copy());
public IPizza As(IPizzaType pizzaType) => pizzaType.Create(_toppings.Copy());
