public void RefundCalculator_When5OfEachDenominationInVault_CanMakeChange()
{
var calculator = new RefundCalculator();
var vault = Enumerable.Repeat(Coin.Nickel, 5)
.Concat(Enumerable.Repeat(Coin.Dime, 5))
.Concat(Enumerable.Repeat(Coin.Quarter, 5));
Assert.IsTrue(calculator.CanMakeChange(vault));
}
public void RefundCalculator_WhenNoCoinsInVault_ExactChangeOnly()
{
var calculator = new RefundCalculator();
Assert.IsFalse(calculator.CanMakeChange(Enumerable.Empty <Coin>()));
}
public void RefundCalculator_WhenLessThan5QuartersInVault_ExactChangeOnly()
{
var calculator = new RefundCalculator();
Assert.IsFalse(calculator.CanMakeChange(Enumerable.Repeat(Coin.Quarter, 4)));
}
public override string Display()
{
var refundCalculator = new RefundCalculator();
return(refundCalculator.CanMakeChange(Vault) ? "INSERT COIN" : "EXACT CHANGE ONLY");
}