public function testGetRetweetsByAuthorsOverFollowerCount()
 {
     $post_dao = new PostMySQLDAO();
     $big_retweeters = $post_dao->getRetweetsByAuthorsOverFollowerCount('134', 'twitter', 10);
     $this->assertEqual(sizeof($big_retweeters), 3);
     $this->assertIsA($big_retweeters[0], 'User');
     $this->assertEqual($big_retweeters[0]->follower_count, 90);
     $this->assertEqual($big_retweeters[0]->username, 'user1');
     $this->assertEqual($big_retweeters[1]->follower_count, 80);
     $this->assertEqual($big_retweeters[1]->username, 'user2');
     $this->assertEqual($big_retweeters[2]->follower_count, 70);
     $this->assertEqual($big_retweeters[2]->username, 'linkbaiter');
 }