public void AbleToMakeChange_25NoQuarters()
 {
     testCoinBank = new CoinBank(20, 10);
     Assert.IsTrue(testCoinBank.AbleToMakeChange(25));
 }
 public void AbleToMakeChange_Unable()
 {
     testCoinBank = new CoinBank(4);
     Assert.IsFalse(testCoinBank.AbleToMakeChange(25));
 }
 public void AbleToMakeChange_NoChange()
 {
     Assert.IsTrue(testCoinBank.AbleToMakeChange(0));
 }