protected String validateAnyAmountField(final Money newAmount) { return newAmount != null && newAmount.isLessThanZero() ? AMOUNT_CANNOT_BE_NEGATIVE : checkCurrency(newAmount); }
public void testIsLessThanZero() { Money m1 = new Money(-1, "usd"); assertTrue(m1.isLessThanZero()); }
public void testIsLessThanZeroFailsWhenZero() { Money m1 = new Money(0, "usd"); assertFalse(m1.isLessThanZero()); }