public void Can_create_instance_with_default_vaules()
{
var topping = new Topping();
topping.ShouldNotBeNull();
topping.Id.ShouldBe(default(int));
topping.Name.ShouldBeNull();
topping.Color.ShouldBeNull();
topping.DonutId.ShouldBe(default(int));
topping.Donut.ShouldBeNull();
}