/// <summary>
/// Attempts to withdraw funds from an account
/// </summary>
/// <param name="account">The account to withdraw from</param>
static void DoWithdraw(Account account)
{
decimal amount = ReadDecimal("Enter the amount");
WithdrawTransaction transaction = new WithdrawTransaction(account, amount);
try
{
transaction.Execute();
}
catch (InvalidOperationException)
{
transaction.Print();
return;
}
transaction.Print();
}
static void Main(string[] args)
{
/*********************************************************
* TESTS
********************************************************/
Account acc = new Account("Peter Stacey");
Account acc1 = new Account("Jane Doe", 100);
Account acc2 = new Account("John Doe", -500);
Debug.Assert(acc.Balance == 0);
Debug.Assert(acc1.Balance == 100);
Debug.Assert(acc2.Balance == 0);
// Test deposit success and rollback
DepositTransaction dep = new DepositTransaction(acc, 500);
dep.Print();
dep.Execute();
Debug.Assert(acc.Balance == 500);
Debug.Assert(dep.Executed == true);
Debug.Assert(dep.Success == true);
dep.Print();
dep.Rollback();
Debug.Assert(acc.Balance == 0);
Debug.Assert(dep.Reversed == true);
dep.Print();
Console.WriteLine("\n\n");
// Test withdraw success and rollback
WithdrawTransaction with = new WithdrawTransaction(acc1, 50);
with.Print();
with.Execute();
Debug.Assert(acc1.Balance == 50);
Debug.Assert(with.Executed == true);
Debug.Assert(with.Success == true);
with.Print();
with.Rollback();
Debug.Assert(acc1.Balance == 100);
Debug.Assert(with.Reversed == true);
with.Print();
Console.WriteLine("\n\n");
// Test transfer success and rollback
TransferTransaction tran = new TransferTransaction(acc1, acc, 50);
tran.Print();
tran.Execute();
Debug.Assert(acc.Balance == 50);
Debug.Assert(acc1.Balance == 50);
Debug.Assert(tran.Executed == true);
Debug.Assert(tran.Success == true);
tran.Rollback();
Debug.Assert(acc.Balance == 0);
Debug.Assert(acc1.Balance == 100);
Debug.Assert(tran.Reversed == true);
tran.Print();
Console.WriteLine("\n\n");
// Test withdraw failure when there is insufficient funds to complete the transaction
// followed by repeating the withdraw after funds are deposited
WithdrawTransaction with2 = new WithdrawTransaction(acc, 100);
with2.Print();
try
{
with2.Execute();
}
catch (InvalidOperationException exception)
{
Console.WriteLine(exception.Message);
}
Debug.Assert(acc.Balance == 0);
Debug.Assert(with2.Success == false);
Debug.Assert(with2.Executed == true);
with2.Print();
DepositTransaction dep2 = new DepositTransaction(acc, 500);
dep2.Execute();
dep2.Print();
try
{
with2.Execute();
}
catch (InvalidOperationException exception)
{
Console.WriteLine(exception.Message);
}
Debug.Assert(acc.Balance == 400);
Debug.Assert(with2.Success == true);
Debug.Assert(with2.Executed == true);
with2.Print();
Console.WriteLine("\n\n");
// Test fail to rollback before deposit or withdraw are
// complete
DepositTransaction dep3 = new DepositTransaction(acc, 500);
WithdrawTransaction with3 = new WithdrawTransaction(acc, 500);
TransferTransaction tran2 = new TransferTransaction(acc, acc1, 200);
try
{
dep3.Rollback();
}
catch (InvalidOperationException exception)
{
Console.WriteLine(exception.Message);
}
try
{
with3.Rollback();
}
catch (InvalidOperationException exception)
{
Console.WriteLine(exception.Message);
}
try
{
tran2.Rollback();
}
catch (InvalidOperationException exception)
{
Console.WriteLine(exception.Message);
}
Console.WriteLine("\n\n");
// Try to rollback deposit from account with insufficient funds
DepositTransaction dep4 = new DepositTransaction(acc2, 100);
WithdrawTransaction with4 = new WithdrawTransaction(acc2, 100);
dep4.Execute();
with4.Execute();
try
{
dep4.Rollback();
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
Console.WriteLine("\n\n");
/*********************************************************
* CLI
********************************************************/
do
{
MenuOption chosen = ReadUserOption();
switch (chosen)
{
case MenuOption.Withdraw:
DoWithdraw(acc); break;
case MenuOption.Deposit:
DoDeposit(acc); break;
case MenuOption.Transfer:
DoTransfer(acc, acc1); break;
case MenuOption.Print:
DoPrint(acc); break;
case MenuOption.Quit:
default:
Console.WriteLine("Goodbye");
System.Environment.Exit(0); // terminates the program
break; // unreachable
}
} while (true);
}