这是我正在单元测试的类。目前我正在测试doSomething函数:classFooClass{publicfunctiondoSomething($user){$conn=$this->getUniqueConnection($user->id);$conn->doSomethingDestructive();}privatefunctiongetUniqueConnection($id){returnnewUniqueConnection($id);}}如您所见，doSomething函数根据它接收的参数的属性获取UniqueConnection的新实例(我未在此处测试的类)。问题是