protected function _addServerOrSkipTest($host, $port)
{
$socket = @fsockopen($host, $port);
if (is_resource($socket)) {
@fclose($socket);
$this->rediska->addServer($host, $port, array('persistent' => true));
} else {
$this->markTestSkipped("You must start server {$host}:{$port} before run test");
}
}