public void Can_deposit_amount(decimal balance, decimal depositAmount, decimal finalBalance, DepositStatus expectedStatus, string expectedErrorMessage)
{
var card = new CashCard(TestPin, _pinValidationService);
card.Deposit(balance);
var response = card.Deposit(depositAmount);
Assert.That(response.Status, Is.EqualTo(expectedStatus));
Assert.That(response.ErrorMessage, Is.EqualTo(expectedErrorMessage));
Assert.That(card.Balance, Is.EqualTo(finalBalance));
}
public void Can_withdraw_multiple_amounts_simultaneously()
{
var pinValidationService = Substitute.For <IPinValidationService>();
pinValidationService.IsPinCorrect(Arg.Any <EncryptedPin>(), Arg.Any <string>()).ReturnsForAnyArgs(true)
.AndDoes(async _ => await Task.Delay(1000));
var card = new CashCard(TestPin, pinValidationService);
card.Deposit(100);
var tf = new TaskFactory();
var tasks = new List <Task>();
for (var i = 1; i <= 4; i++)
{
tasks.Add(tf.StartNew(() =>
{
var resp = card.Withdraw(10, TestPin);
Assert.That(resp.Status, Is.EqualTo(WithdrawalStatus.Successful));
}));
}
Task.WaitAll(tasks.ToArray());
// One final one to ensure we end up with the right value
var response = card.Withdraw(10, TestPin);
Assert.That(response.Status, Is.EqualTo(WithdrawalStatus.Successful));
Assert.That(response.ErrorMessage, Is.EqualTo(""));
Assert.That(card.Balance, Is.EqualTo(50));
}
public void Cannot_withdraw_more_than_balance_with_multiple_simultaneous_requests()
{
var pinValidationService = Substitute.For <IPinValidationService>();
pinValidationService.IsPinCorrect(Arg.Any <EncryptedPin>(), Arg.Any <string>()).ReturnsForAnyArgs(true)
.AndDoes(async _ => await Task.Delay(1500));
var card = new CashCard(TestPin, pinValidationService);
card.Deposit(25);
var tf = new TaskFactory();
var tasks = new List <Task>();
var responses = new List <WithdrawalStatus>();
for (var i = 1; i <= 4; i++)
{
tasks.Add(tf.StartNew(() =>
{
var resp = card.Withdraw(10, TestPin);
responses.Add(resp.Status);
}));
}
Task.WaitAll(tasks.ToArray());
Assert.That(responses.Count(r => r == WithdrawalStatus.Successful), Is.EqualTo(2));
Assert.That(responses.Count(r => r == WithdrawalStatus.InsufficientFunds), Is.EqualTo(2));
Assert.That(card.Balance, Is.EqualTo(5));
}
public void Cannot_withdraw_with_incorrect_pin()
{
var card = new CashCard(TestPin, _pinValidationService);
card.Deposit(50);
var response = card.Withdraw(25, "4321");
Assert.That(response.Status, Is.EqualTo(WithdrawalStatus.Error));
Assert.That(response.ErrorMessage, Is.EqualTo(ErrorCodes.InvalidPin));
Assert.That(card.Balance, Is.EqualTo(50));
}