如何创建学说实体的模拟对象?

I'm trying to write a unit test with phpunit for a model that uses doctrine 2. I want to mock the doctrine entities but I really don't have a clue of how to do this. Can anyone explain to me how I need to do this? I'm using Zend Framework.

需要测试的模型

class Country extends App_Model
{
    public function findById($id)
    {
        try {
            return $this->_em->find('EntitiesCountry', $id);
        } catch (DoctrineORMORMException $e) {
            return NULL;
        }
    }

    public function findByIso($iso)
    {
        try {
            return $this->_em->getRepository('EntitiesCountry')->findOneByIso($iso);
        } catch (DoctrineORMORMException $e) {
            return NULL;
        }
    }
}

Bootstrap.php

protected function _initDoctrine()
{
    Some configuration of doctrine
    ... 
    // Create EntityManager
    $em = EntityManager::create($connectionOptions, $dcConf);
    Zend_Registry::set('EntityManager', $em);
}

扩展模型

class App_Model
{
    // Doctrine 2.0 entity manager
    protected $_em;

    public function __construct()
    {
        $this->_em = Zend_Registry::get('EntityManager');
    }
}

推荐答案

Doctrine 2 实体应该像任何旧类一样对待.您可以像 PHPUnit 中的任何其他对象一样模拟它们.

$mockCountry = $this->getMock('Country');