public void testToStandardSeconds() {
        Hours test = Hours.hours(3);
        Seconds expected = Seconds.seconds(3 * 60 * 60);
        assertEquals(expected, test.toStandardSeconds());
        
        try {
            Hours.MAX_VALUE.toStandardSeconds();
            fail();
        } catch (ArithmeticException ex) {
            // expected
        }
    }