public void ValidCoin_Quarter()
 {
     Assert.AreEqual(25, CoinBank.CoinValue(CoinBank.QUARTER.Item1, CoinBank.QUARTER.Item2));
 }
 public void ValidCoin_Nickel()
 {
     Assert.AreEqual(5, CoinBank.CoinValue(CoinBank.NICKEL.Item1, CoinBank.NICKEL.Item2));
 }
 public void ValidCoin_Dime()
 {
     Assert.AreEqual(10, CoinBank.CoinValue(CoinBank.DIME.Item1, CoinBank.DIME.Item2));
 }
 public void ValidCoin_Penny()
 {
     Assert.AreEqual(0, CoinBank.CoinValue(CoinBank.PENNY.Item1, CoinBank.PENNY.Item2));
 }