public void Charge_overdaft_fees() { SavingBookContract saving = new SavingBookContract(ApplicationSettings.GetInstance(""), new User(), new DateTime(2009, 01, 01), null) { Product = _bookProduct, AgioFees = 0.01, ChequeDepositFees = 100, DepositFees = 50, CloseFees = 100, ReopenFees = 100, OverdraftFees = 100 }; saving.FirstDeposit(1000, new DateTime(2009, 01, 01), null, new User(), Teller.CurrentTeller); Currency currency = new Currency() { UseCents = true, Code = "SOM", Id = 1, IsPivot = true, Name = "SOM" }; Assert.AreEqual(1000, saving.GetBalance().Value); //Below, we explicitly implement withdraw method from <Saving services>.<Withdraw>, since withdraw method of 'saving' object doesn't implement // overdraft fee by default List <SavingEvent> withdrawEvents = saving.Withdraw(1100, new DateTime(2009, 1, 2), "withdraw", new User(), false, null); if (saving.GetBalance() < 0 && !saving.InOverdraft) { saving.ChargeOverdraftFee(new DateTime(2009, 1, 2), new User()); } Assert.AreEqual(-200, saving.GetBalance().Value); }