public void WithdrawToLessThan0()
{
decimal money = 100;
string number = "46346";
string cardPin = "3456";
using (ATMEntities context = new ATMEntities())
{
context.CardAccounts.Add(new CardAccount() { CardCash = money, CardNumber = number, CardPIN = cardPin });
context.SaveChanges();
TransactionScope tran = new TransactionScope(TransactionScopeOption.Required,
new TransactionOptions { IsolationLevel = IsolationLevel.RepeatableRead });
using (tran)
{
var account = context.CardAccounts.Where(x => x.CardNumber == number
&& x.CardPIN == cardPin && x.CardCash == money).First();
if (account.CardCash >= 2 * money)
{
account.CardCash -= 2 * money;
context.SaveChanges();
tran.Complete();
}
context.SaveChanges();
}
var acc = context.CardAccounts.Where(x => x.CardNumber == number && x.CardPIN == cardPin).First();
Assert.AreEqual(money, acc.CardCash);
}
}
static void Main(string[] args)
{
decimal cash = 200;
ATMEntities context = new ATMEntities();
TransactionScope tran = new TransactionScope(TransactionScopeOption.Required,
new TransactionOptions { IsolationLevel = IsolationLevel.RepeatableRead });
using (tran)
{
var account = context.CardAccounts.Where(x => x.Id == 1).First();
if (CheckCardPIN(account.CardPIN) && CheckCardNumber(account.CardNumber) && account.CardCash >= cash)
{
account.CardCash -= cash;
context.TranscationsHistories.Add(
new TranscationsHistory()
{
CardNumber = account.CardNumber,
TranscationDate = DateTime.Now,
Amount = account.CardCash
});
context.SaveChanges();
tran.Complete();
}
}
}