public function testHDel()
{
$redis = $this->getRedis();
list($hashKey, $key) = RedisHelper::hashKey('group_', 'group');
$status = $redis->hDel($hashKey, $key);
$this->assertEmpty($redis->hGet($hashKey, $key));
}
/**
* to do hash
*/
public function destroy($sessionId)
{
list($hashKey, $key) = RedisHelper::hashKey($this->prefix, $sessionId);
return $this->redis->hDel($hashKey, $key);
}