public void When_SuccessfullTop_Except_BalanceToBeAdjusted()
{
_virtalCashCardWithBalance.Topup(_validPinNumber, 300.00M);
_virtalCashCardWithBalance.CheckBalance(_validPinNumber).Should().Be(800.00M);
}
public void WhenNoPinNumberIsProvidedToTopupMoney_Expect_InvalidOperationException()
{
Action action = () => _virtalCashCard.Topup(string.Empty, 0);
action.Should().Throw <ArgumentException>().WithMessage("Pin number must be provided");
}