public void When_NewAccountIsCreated_Expect_InitialBalance()
{
_virtalCashCardWithBalance.CheckBalance(_validPinNumber).Should().Be(500.00M);
}
public void When_NoPinNumberIsProvidedToCheckBalance_Expect_InvalidOperation()
{
Action action = () => _virtalCashCard.CheckBalance(string.Empty);
action.Should().Throw <ArgumentException>().WithMessage("Pin number must be provided");
}