public function testGetPlaylistById()
{
//get one of the playlist
$GOOGLE_CHANNELID = 'UCK8sQmJBp8GCxrOtXWBpyEA';
$response = $this->youtube->getPlaylistsByChannelId($GOOGLE_CHANNELID);
$playlist = $response[0];
$response = $this->youtube->getPlaylistById($playlist->id);
$this->assertEquals('youtube#playlist', $response->kind);
}