public void DollarTests()
        {
            ICurrency dollar = new Dollar();

            Assert.AreEqual(1m, dollar.Value);
            Assert.AreEqual("Dollar", dollar.Name);
        }
        public void InjectingIntoConstructors()
        {
            var dollar   = new Dollar();
            var ePayment = new ElectronicPayment(317.2m);

            var firstTransaction  = new Transaction(dollar);
            var secondTransaction = new Transaction(ePayment);

            Console.WriteLine(firstTransaction.GetTransactionType());
            Console.WriteLine(secondTransaction.GetTransactionType());

            Assert.AreEqual("Dollar", firstTransaction.GetTransactionType());
            Assert.AreEqual("Electronic Payment", secondTransaction.GetTransactionType());
        }
        public void InjectingIntoConstructors()
        {
            // Creating new instances of our ICurrency interface objects
            var dollar = new Dollar();
            var ePay   = new ElectronicPayment(243.71m);

            // "Injecting" them into Transaction class for that _currency field
            var firstTransaction  = new Transaction(dollar);
            var secondTransaction = new Transaction(ePay);

            Console.WriteLine(firstTransaction.GetTransactionType());
            Console.WriteLine(secondTransaction.GetTransactionType());

            Console.WriteLine(secondTransaction.GetTransactionAmount());
        }