Gist do post "Usando PHPUnit no Codeigniter via Hooks" Link: http://willmendesnetoprojects.wordpress.com/2013/02/24/usando-phpunit-no-codeigniter-via-hooks/

Post.php

<?php

class Post extends CI_Model
{
    public function getAll()
    {
        $query = $this->db->get('posts');
        $posts = array();

        foreach ($query->result_array() as $row) {
            $posts[] = $row;
        }

        return $posts;
    }
}