public function testCommentOnAComment()
{
$developerKey = constant('TESTS_ZEND_GDATA_YOUTUBE_DEVELOPER_KEY');
$clientId = constant('TESTS_ZEND_GDATA_YOUTUBE_CLIENT_ID');
$client = ClientLogin::getHttpClient($this->user, $this->pass, 'youtube', null, 'ZF_UnitTest', null, null, 'https://www.google.com/youtube/accounts/ClientLogin');
$youtube = new YouTube($client, 'ZF_UnitTest', $clientId, $developerKey);
$youtube->setMajorProtocolVersion(2);
$mostDiscussedFeed = $youtube->getVideoFeed('https://gdata.youtube.com/feeds/api/standardfeeds/most_discussed');
// get first entry
$mostDiscussedFeed->rewind();
$firstEntry = $mostDiscussedFeed->current();
$this->assertTrue($firstEntry instanceof YouTube\VideoEntry);
$commentFeed = $youtube->getVideoCommentFeed($firstEntry->getVideoId());
// get first comment
$commentFeed->rewind();
$firstCommentEntry = $commentFeed->current();
$commentedComment = $youtube->replyToCommentEntry($firstCommentEntry, 'awesome ! (ZFUnitTest-test)');
$this->assertTrue($commentedComment instanceof YouTube\CommentEntry);
}