public function testFromFrames()
{
$this->assertNull(TimeHelper::fromFrames(null));
$this->assertNull(TimeHelper::fromFrames('dsasd'));
$this->assertEquals('00:00:00.000', TimeHelper::fromFrames(0));
$this->assertEquals('00:00:01.800', TimeHelper::fromFrames(45));
$this->assertEquals('00:07:02.360', TimeHelper::fromFrames(10559));
$this->assertEquals('02:23:13.400', TimeHelper::fromFrames(214835));
$this->assertEquals('02:23:13', TimeHelper::fromFrames(214835, 'HH:MM:SS'));
$this->assertEquals('02:23:13:10', TimeHelper::fromFrames(214835, 221321));
}