public void PaymentProvider_OnUpdateCardBalance_UpdatesCardBalance()
{
IPaymentProvider paymentProvider =
new CashCardPaymentProvider(
new CashCard(new Account("HSBC", "Avinash Jethani", new Payment(1m, CurrencyEnum.GBP)),
"12345"));
var isValid = paymentProvider.IsValidPin("12345");
var updatesCardBalance = paymentProvider.UpdateCardBalance(new Payment(0.5m, CurrencyEnum.GBP));
Assert.That(isValid, Is.EqualTo(true));
Assert.That(updatesCardBalance, Is.EqualTo(true));
Assert.That(paymentProvider.CardBalance, Is.EqualTo(new Payment(0.5m, CurrencyEnum.GBP)));
}
