public function testSecondsToTimeString()
{
$this->assertEquals('0:00:00', StringUtils::secondsToTimeString(0));
$this->assertEquals('00:00', StringUtils::secondsToTimeString(0, true));
$this->assertEquals('0:00:05', StringUtils::secondsToTimeString(5));
$this->assertEquals('0:15:36', StringUtils::secondsToTimeString(936));
$this->assertEquals('15:36', StringUtils::secondsToTimeString(936, true));
$this->assertEquals('14:54:23', StringUtils::secondsToTimeString(53663));
$this->assertEquals('-0:00:05', StringUtils::secondsToTimeString(-5));
$this->assertEquals('-0:15:36', StringUtils::secondsToTimeString(-936));
$this->assertEquals('-15:36', StringUtils::secondsToTimeString(-936, true));
$this->assertEquals('-14:54:23', StringUtils::secondsToTimeString(-53663));
}