public function testGetPlaylistItemsByPlaylistId()
{
$GOOGLE_ZEITGEIST_PLAYLIST = 'PL590L5WQmH8fJ54F369BLDSqIwcs-TCfs';
$response = $this->youtube->getPlaylistItemsByPlaylistId($GOOGLE_ZEITGEIST_PLAYLIST);
$data = $response['results'];
$this->assertTrue(count($data) > 0);
$this->assertEquals('youtube#playlistItem', $data[0]->kind);
}