public async void MultipleSimultaneousWithdrawTransactions()
{
// Arrange
var cashCard = new CashCard(_testsFixture.MockPinService.Object, 1, 5m);
// Act
var withdrawTask1 = Task.Run(() => { return(cashCard.WithdrawCash(1234, 5m)); });
var withdrawTask2 = Task.Run(() => { return(cashCard.WithdrawCash(1234, 5m)); });
var withdrawTask3 = Task.Run(() => { return(cashCard.WithdrawCash(1234, 5m)); });
await Task.WhenAll(withdrawTask1, withdrawTask2, withdrawTask3);
// Assert
// Check that we received exactly 2 rejections for insufficient balance from the 3 operations
var rejectionReasons = new List <RejectionReasonEnum?>()
{
withdrawTask1.Result.RejectionReason, withdrawTask2.Result.RejectionReason, withdrawTask3.Result.RejectionReason
};
Assert.Single(rejectionReasons.Where(x => x == null));
Assert.Equal(2, rejectionReasons.Where(x => x == RejectionReasonEnum.InsufficientBalance).Count());
Assert.Equal(0m, withdrawTask1.Result.RemainingBalance);
Assert.Equal(0m, withdrawTask2.Result.RemainingBalance);
Assert.Equal(0m, withdrawTask3.Result.RemainingBalance);
}
public void CorrectPinCorrectAmountWithdrawSucceeds(decimal balance, decimal withdrawAmount)
{
// Arrange
var cashCard = new CashCard(_testsFixture.MockPinService.Object, 1, balance);
// Act
var result = cashCard.WithdrawCash(1234, withdrawAmount);
// Assert
Assert.Null(result.RejectionReason);
Assert.Equal(balance - withdrawAmount, result.RemainingBalance);
}
public void CorrectPinAmountTooLargeWithdrawRejected(decimal withdrawAmount, decimal balance)
{
// Arrange
var cashCard = new CashCard(_testsFixture.MockPinService.Object, 1, balance);
// Act
var result = cashCard.WithdrawCash(1234, withdrawAmount);
// Assert
Assert.Equal(RejectionReasonEnum.InsufficientBalance, result.RejectionReason);
Assert.Equal(balance, result.RemainingBalance);
}
public void IncorrectPinWithdrawRejectedBalanceNotRevealed(decimal withdrawAmount, decimal balance)
{
// Arrange
var cashCard = new CashCard(_testsFixture.MockPinService.Object, 1, balance);
// Act
var result = cashCard.WithdrawCash(1111, withdrawAmount);
// Assert
Assert.Equal(RejectionReasonEnum.IncorrectPin, result.RejectionReason);
Assert.Equal(0, result.RemainingBalance);
}
