public void GivenIPayOneDollarsWithABankTotalOfThree()
{
var bank = new CoinBank();
bank.DecreaseBalance(1.0M);
Assert.AreEqual(bank.HasChange(), true);
}
public void GivenIPayTwoDollarsWithABankTotalOfThree()
{
var bank = new CoinBank();
bank.DecreaseBalance(2.1M);
Assert.AreEqual(bank.HasChange(), false);
}