Esempio n. 1
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        // GetCalculator Factory Method
        private static IChangeCalculator GetCalculator(decimal amountOwed)
        {
            IChangeCalculator changeCalculator;

            //NOTE: The specifications said if the amount is a multiple of 3 and gave $3.33 as an example of this, but 3.33 is not a multiple of 3, so
            // I made the assumption that I should check if the amount owed in cents is a multiple of 3.
            if (amountOwed == 0 || (amountOwed * 100) % 3 != 0)
            {
                changeCalculator = new LargestDenominationFirstChangeCalculator();
            }
            else
            {
                changeCalculator = new RandomizedChangeCalculator();
            }

            return(changeCalculator);
        }
        public IDictionary <ICurrencyDenomination, int> GetChange(PurchaseTransaction transaction, IEnumerable <ICurrencyDenomination> denominationsAvailable)
        {
            var changeCalculator = new LargestDenominationFirstChangeCalculator();

            return(changeCalculator.GetChange(transaction.AmountReceived - transaction.AmountOwed, denominationsAvailable));
        }