public function testAddLink()
{
$query = new Query();
$binding = $this->createHttpBinding();
$postRid = $this->post_id . ':0';
$commentRid = $this->comment_id . ':1';
$records = $binding->command('SELECT FROM ' . $postRid)->getResult();
$before = count($records[0]->comments);
$query->add(array('comments' => $commentRid), 'post')->where('@rid = ?', $postRid);
$this->assertHttpStatus(200, $this->doQuery($query, $binding));
$records = $binding->command('SELECT FROM ' . $postRid)->getResult();
$after = count($records[0]->comments);
$this->assertSame($after, $before + 1);
}