模拟DB / SQL无脂肪框架（F3）phpunit

Question

我正在尝试为返回false或object的函数编写测试。

class Environment {


    protected $db , $env, $envMapper= "";

    public function __construct($dbConnection) {
        $this->db = $dbConnection;
        $this->setMapper($this->db);
    }


    public function setMapper($db){
        $this->envMapper=new DB\SQL\Mapper($this->db,'environment');
    }

    public function save($envName) {
        $this->envMapper->name = $envName;
        return $this->envMapper->save();
    }

    /**
     * @param $envId
     */
    public function get($envId) {

    }

    /***
     * @param $envName
     */
    public function getByName($envName) {

    }
} 

试验：

class EnvironmentTest extends PHPUnit_Framework_TestCase {

    protected $db = "";


    public function setup()
    {
        $this->db = $this->getMockBuilder('SqlHelper')
            ->setMethods(array('connect'))
            ->getMock();
    }


    public function testSave() {
        $object = new StdClass();
        $env = new Environment($this->db);
        $this->assertEquals($object, $env->save('Test'));
    }
}

我不知道应该如何更改，以便它可以测试，它总是返回

  

EnvironmentTest :: testSave   PHPUnit_Framework_MockObject_RuntimeException：您无法序列化或   反序列化PDO实例