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