public function testHourFormat()
{
$Time = new Duration();
$this->assertEquals('24:00:00', $Time->fromSeconds(24 * 3600)->string(Duration::FORMAT_WITH_HOURS));
$this->assertEquals('27:13:08', $Time->fromSeconds(27 * 3600 + 13 * 60 + 8)->string(Duration::FORMAT_WITH_HOURS));
}
