public void TestReduceMoneyDifferentCurrency()
{
Bank bank = new Bank();
bank.AddRate("CHF", "USD", 2);
Money result = bank.Reduce(Money.CreateFranc(2), "USD");
Assert.AreEqual(Money.CreateDollar(1), result);
}
public void TestMixedAddition()
{
Expression fiveDollars = Money.CreateDollar(5);
Expression tenFrancs = Money.CreateFranc(10);
Bank bank = new Bank();
bank.AddRate("CHF", "USD", 2);
Money result = bank.Reduce(fiveDollars.Plus(tenFrancs), "USD");
Assert.AreEqual(Money.CreateDollar(10), result);
}
public Money Reduce(Bank bank, string targetCurrency)
{
int rate = bank.GetRate(_currency, targetCurrency);
return new Money(Amount / rate, targetCurrency);
}
public void TestSimpleAddition()
{
Money five = Money.CreateDollar(5);
Expression sum = five.Plus(five);
Bank bank = new Bank();
Money reduced = bank.Reduce(sum, "USD");
Assert.AreEqual(Money.CreateDollar(10), reduced);
}
public void TestReduceSum()
{
Expression sum = new Sum(Money.CreateDollar(3), Money.CreateDollar(4));
Bank bank = new Bank();
Money result = bank.Reduce(sum, "USD");
Assert.AreEqual(Money.CreateDollar(7), result);
}
public void TestReduceMoney()
{
Bank bank = new Bank();
Money result = bank.Reduce(Money.CreateDollar(1), "USD");
Assert.AreEqual(Money.CreateDollar(1), result);
}
public void TestSumTimes()
{
Expression fiveDollars = Money.CreateDollar(5);
Expression tenFrancs = Money.CreateFranc(10);
Bank bank = new Bank();
bank.AddRate("CHF", "USD", 2);
Expression sum = new Sum(fiveDollars, tenFrancs).Times(2);
Money result = bank.Reduce(sum, "USD");
Assert.AreEqual(Money.CreateDollar(20), result);
}
public Money Reduce(Bank bank, string targetCurrency)
{
int amount = Augend.Reduce(bank, targetCurrency).Amount + Addend.Reduce(bank, targetCurrency).Amount;
return new Money(amount, targetCurrency);
}
