Could not use the model which the default controller has been created in the testcase

[shelverizr]

I want to reuse some model, so I wrote the code like this

<?php
/**
* 模型基础测试类
* 用于设置一些公共的自动加载功能
*/
abstract class CIModelTestCase extends CITestCase
{
    protected $CI;

    public function __construct()
    {
        parent::__construct();
    }

    public static function setUpBeforeClass()
    {
        $CI =& get_instance();
        $CI->load->model('category');
        $CI->load->model('flow_record');
        $CI->load->model('order');
        $CI->load->model('mall_m');
        $CI->load->model('cart');
        $CI->load->database();
    }

    public static function tearDownAfterClass()
    {
        $CI =& get_instance();
        $CI->db->close();
    }
}

But I found that some model were useless. When I hack the Loader.php in the function model():

foreach ($this->_ci_model_paths as $mod_path)
{
    if ( ! file_exists($mod_path.'models/'.$path.$model.'.php'))
    {
        continue;
    }

    require_once($mod_path.'models/'.$path.$model.'.php');
    $this->_ci_models[] = $name;
    $CI->$name = new $model();
        // added this line
    var_dump($name, new $model());
    return $this;
}

The result:

Model ‘cart’, ‘order’, ‘mall_m’ were not in the ‘stubmodel’.

But if I change the default controller from

$route['default_controller'] = 'mall';

To

$route['default_controller'] = 'supermarket';

The result:

This time, the model ‘goods’ is not found in the ‘stubmodel’, but model ‘cart’, ‘order’, ‘mall_m’ were appeared.

How Should I fix it?

By the way:

Mall.php(only construct)

class Mall extends CI_Controller
{
    public $data;
    public $user;
    function __construct()
    {
        //调用父类的构造函数
        parent::__construct();
        $this->load->helper('url');
        $this->load->helper('cookie');
        $this->load->library('session');
        $this->load->model('cart');
        $this->load->model('order');
        $this->load->model("mall_m");//User_model模型类实例化对象

        $user=$this->mall_m->user_selecet(array('username'=>$this->session->username,'password'=>$this->session->password));

    }
}

Supermarket.php(only construct)

<?php
/**
* 超市控制器
*/
class Supermarket extends CI_Controller
{
    // 超市所属分类id
    const SUPERMARKET_TYPE_ID = 212;

    function __construct()
    {
        // 调用父类方法
        parent::__construct();
        // 加载商品分类类
        $this->load->model('category');
        // 加载商品类
        $this->load->model('goods');
        // 加载数据库
        $this->load->database();
    }
}

CategoryTest.php(A simple testcase)

<?php

require_once(__DIR__ . '/../CIModelTestCase.php');

/**
* 栏目类测试类
*/
class CategoryTest extends CIModelTestCase
{
    public function test_get_all_children()
    {
        $this->assertEquals($this->CI->category->get_all_children('212'), $this->CI->db->query("SELECT * FROM typelist WHERE reid='212'")->result());
    }
}