public function setUp()
{
$this->_db = new MongoDb($this->_testConfig);
$this->_db->server = new MockMongoConnection();
$this->_db->connection = new MockMongoConnection();
Connections::add('mockconn', array('object' => $this->_db));
MockMongoPost::config(array('meta' => array('key' => '_id', 'connection' => 'mockconn')));
$type = 'create';
$this->_query = new Query(compact('model', 'type') + array('entity' => new Document(array('model' => $this->_model))));
}