public function setUp()
{
$this->client = $this->getMock('MongoClient');
$this->aclCollection = $this->getMockBuilder('MongoCollection')->disableOriginalConstructor()->getMock();
$this->aclGroupCollection = $this->getMockBuilder('MongoCollection')->disableOriginalConstructor()->getMock();
$this->adapter = new MongoDB(null, $this->client, $this->aclCollection, $this->aclGroupCollection);
}