public Beer(Guid?id, string label, string description, int?stock)
{
Id = new BeerId(id);
Label = new BeerLabel(label);
Description = new BeerDescription(description);
Stock = new BeerStock(stock);
}
public void DecreaseStock(int stock)
{
var result = Stock.Value - Math.Abs(stock);
Stock = new BeerStock(result < 0 ? 0 : result);
}
public void IncreaseStock(int stock)
{
Stock = new BeerStock(Stock.Value + Math.Abs(stock));
}
