public void DecreaseStock(Drug drug, int decrease)
{
if (stockProvider.StockCount(drug) <= 0)
throw new StockIsEmptyException();
if (stockProvider.StockCount(drug) < decrease)
throw new StockIsTooLowException();
stockProvider.DecreaseStock(drug, decrease);
}
public Prescription(DateTime expiry, IClock clock, Drug drug)
{
this.expiry = expiry;
this.clock = clock;
}
public int StockCount(Drug drug)
{
return stockProvider.StockCount(drug);
}
public bool IsDrugInStock(Drug drug)
{
return stockProvider.StockCount(drug) > 0;
}