public function testSniff()
 {
     $params['connectionPoolClass'] = '\\Elasticsearch\\ConnectionPool\\SniffingConnectionPool';
     $params['connectionPoolParams']['sniffingInterval'] = -10;
     $params['hosts'] = array($_SERVER['ES_TEST_HOST']);
     $client = new \Elasticsearch\Client($params);
     $client->ping();
 }
 /**
  * Indicates if connection to the search engine is up or not
  *
  * @return bool
  */
 public function getStatus()
 {
     return $this->_client->ping();
 }