public void CheckRecordNumber()
{
Database.SetInitializer(
new DropCreateDatabaseAlways<ATMContext>());
decimal money = 2000;
decimal toWithdraw = 1000;
int number = 1111111111;
int cardPin = 1111;
using (var db = new ATMContext())
{
db.CardAccounts.Add(new CardAccount()
{ CardCash = money, CardNumber = number, CardPIN = cardPin });
db.SaveChanges();
ATMActions.WithdrawMoney(cardPin, number, toWithdraw, db);
db.SaveChanges();
var actual = (from c in db.TransactionsHistory
select c).First();
Assert.AreEqual(number, actual.CardNumber);
db.Dispose();
}
}
public static bool WithdrawMoney(int PIN, int cardNumber, decimal moneyToWithdraw, ATMContext db)
{
bool success = true;
int cardNumberToRecord = 0;
using (var scope = new TransactionScope(
TransactionScopeOption.RequiresNew,
new TransactionOptions()
{
IsolationLevel = IsolationLevel.RepeatableRead
}
))
{
var card = (from c in db.CardAccounts
where c.CardNumber == cardNumber
select c).First();
if (card == null || card.CardPIN != PIN || card.CardCash < moneyToWithdraw)
{
success = false;
}
else
{
card.CardCash -= moneyToWithdraw;
cardNumberToRecord = card.CardNumber;
scope.Complete();
}
}
if (success)
{
RecordWithdrawal(cardNumberToRecord, moneyToWithdraw, db);
db.SaveChanges();
return true;
}
else
{
return false;
}
}