IMoney ms1= MoneyBag.create(new Money(12, "CHF"), new Money(3, "USD"));
Money expected= new Money(4, "USD");
assertEquals(expected, fMB1.subtract(ms1));
}
@Test public void testNormalize4() { // [12 CHF] - {[12 CHF][3 USD]} == [-3 USD]
IMoney ms1= MoneyBag.create(new Money(12, "CHF"), new Money(3, "USD"));
Money expected= new Money(-3, "USD");
assertEquals(expected, f12CHF.subtract(ms1));
}