public async Task Edit_NoToppings(Pizza p, Pizza changes)
{
await Pizzas.Add(p);
p.BasePrice = changes.BasePrice;
p.Description = changes.Description;
p.Name = changes.Name;
p.Toppings.Clear();
await Pizzas.Edit(p);
var result = await Pizzas.Get(p.Id);
Assert.Equal(p, result);
}