public void ToString_Remainder_DenominationsAndRemainder()
{
var subject = new ChangeSolution(new[] { new Denomination(2) },
new Money(5, CurrencyIsoCode.EUR));
using (CultureReseter.Set(CultureInfo.InvariantCulture))
{
Assert.That(subject.ToString(), Is.EqualTo("< < 1 * 2 > > + < 5,00 € >"));
}
}
public void ToString_NoRemainder_OnlyDenominations()
{
var subject = new ChangeSolution(new[] { new Denomination(2) },
Money.Zero(CurrencyIsoCode.EUR));
using (CultureReseter.Set(CultureInfo.InvariantCulture))
{
Assert.That(subject.ToString(), Is.EqualTo("< < 1 * 2 > >"));
}
}
public void ToString_CanReceiveCustomFormatsAndProviders()
{
var denominations = new[] { new Denomination(2), new Denomination(.2m), new Denomination(.2m) };
var subject = new ChangeSolution(denominations, Money.Zero(CurrencyIsoCode.EUR));
var snailDecimalSeparator = (NumberFormatInfo)CultureInfo.InvariantCulture.NumberFormat.Clone();
snailDecimalSeparator.NumberDecimalSeparator = "@";
Assert.That(subject.ToString(".000", snailDecimalSeparator), Is.EqualTo("< < 1 * 2@000 > | < 2 * @200 > >"));
}
public void ToString_ValueString_AsPerCurrentCulture()
{
var denominations = new[] { new Denomination(2), new Denomination(.2m), new Denomination(.2m) };
var subject = new ChangeSolution(denominations, Money.Zero(CurrencyIsoCode.EUR));
using (CultureReseter.Set("en-US"))
{
Assert.That(subject.ToString(), Is.EqualTo("< < 1 * 2 > | < 2 * 0.2 > >"), "US decimals with a dot");
}
using (CultureReseter.Set("da-DK"))
{
Assert.That(subject.ToString(), Is.EqualTo("< < 1 * 2 > | < 2 * 0,2 > >"), "DK decimals with a comma");
}
}
public void Money_MakeChange()
{
Money moneyBack = 1m.Usd().Minus(.37m.Usd()); // ¢63
Denomination[] usCoins =
{
new Denomination(.25m), // quarters
new Denomination(.10m), // dimes
new Denomination(.05m), // nickels
new Denomination(.01m) // pennies
};
uint seventyThree = moneyBack.CountWaysToMakeChange(usCoins);
// --> 73 ways to make change of ¢63
Assert.That(seventyThree, Is.EqualTo(73));
// optimal for canonical systems
ChangeSolution change = moneyBack.MakeChange(usCoins);
// --> six coins: 2 quarters, 1 dime, 3 pennies
Assert.That(change.TotalCount, Is.EqualTo(6));
OptimalChangeSolution sameChange = moneyBack.MakeOptimalChange(usCoins);
// --> six coins as well: 2 quarters, 1 dime, 3 pennies
Assert.That(sameChange.TotalCount, Is.EqualTo(6));
var nonCanonicalDenominations = new[]
{
new Denomination(.25m), // quarters
new Denomination(.10m), // dimes
new Denomination(.05m), // nickels
new Denomination(.01m), // pennies
new Denomination(.21m) // ?
};
ChangeSolution subOptimal = moneyBack.MakeChange(nonCanonicalDenominations);
// --> six coins: 2 quarters, 1 dime, 3 pennies
Assert.That(subOptimal.TotalCount, Is.EqualTo(6));
OptimalChangeSolution optimal = moneyBack.MakeOptimalChange(nonCanonicalDenominations);
// --> three coins: 3 of .21
Assert.That(optimal.TotalCount, Is.EqualTo(3));
}
public void GetChangeBankNotesAndCoinsReturnsCorrectSolution(int change, ChangeSolution expected)
{
var result = this.sut.GetChangeBankNotesAndCoins(change);
result.Should().BeEquivalentTo(expected);
}