public ATMResponse WithdrawFunds(decimal withdrawalAmount, CustomerAccount account, Int32 pinNumber, out decimal accountBalance)
{
accountBalance = 0;
if (!IsPinValid(account, pinNumber))
return ATMResponse.ACCOUNT_ERR;
// check if the cashmachine has enough cash for the withdrawal request
if (withdrawalAmount > _machineBalance)
return ATMResponse.ATM_ERR;
if (withdrawalAmount <= account.GetWithdrawalBalance())
{
account.WithdrawFunds(withdrawalAmount);
accountBalance = account.GetBalance();
}
else
{
return ATMResponse.FUNDS_ERR;
}
return ATMResponse.SUCCESS;
}
public void ATMMachine_WhenUserTriesToWithdrawMoreThantheirAccountTotal_ReturnsFundsError(decimal machineBalance,
Int32 accountNumber,
decimal initialAccountBalance,
decimal overDraft,
Int32 pinNumber)
{
var cashPoint = new ATMMachine(machineBalance);
var account = new CustomerAccount(initialAccountBalance, accountNumber, pinNumber, overDraft);
decimal excessiveWithdrawalAmount = initialAccountBalance + overDraft + 1;
decimal customerBalance;
ATMResponse result = cashPoint.WithdrawFunds(excessiveWithdrawalAmount, account, pinNumber, out customerBalance);
Assert.That(result, Is.EqualTo(ATMResponse.FUNDS_ERR));
Assert.That(account.GetWithdrawalBalance(), Is.EqualTo(initialAccountBalance + overDraft));
}