public void Should_Different_Plus()
{
MoneyExpression sum = Money.Dollar(5).Plus(Money.Franc(10));
Bank bank = new Bank();
bank.AddRate("CHF", "USD", 2);
Assert.AreEqual(Money.Dollar(10), sum.Reduce(bank, USD));
}
public void Test_Sum_Times()
{
MoneyExpression fiveBucks = Money.Dollar(5);
MoneyExpression tenFrancs = Money.Franc(10);
Bank bank = new Bank();
bank.AddRate("CHF", "USD", 2);
MoneyExpression sum = new Sum(fiveBucks, tenFrancs).Times(2);
Money result = bank.Reduce(sum, USD);
Assert.AreEqual(Money.Dollar(20), result);
}
public MoneyExpression Plus(MoneyExpression addend) => new SumExpression(this, addend);
public SumExpression(MoneyExpression augend, MoneyExpression addend)
{
Augend = augend;
Addend = addend;
}
public MoneyExpression Plus(MoneyExpression fiveBucks)
{
return(new Sum(this, addend));
}
public Sum(MoneyExpression augend, MoneyExpression addend)
{
this.augend = augend;
this.addend = addend;
}
public Money Reduce(MoneyExpression source, string to) => source.Reduce(this, to);
public Money Reduce(MoneyExpression source, string to)
{
return(source.Reduce(this, to));
}