public void ArgumentExceptionIsThrown_WhenValidatedBetIsNotMultipleOfFive()
{
var casino = new Casino();
var bets = Enumerable
.Range(1, 100)
.Where(bet => bet % 5 != 0);
foreach (var bet in bets)
{
Assert.ThrowsException <ArgumentException>(() => casino.ValidateBet(bet));
}
}