added setExpectedException and check empty($search)

redis/RedisDebug.php

@@ -25,6 +25,12 @@ class RedisDebug
     {
         $command = $this->r_implode(', ', $arguments);
         $profiler = Profiler::getInstance()->profilerCommand('Redis->' . $name, $command);
+
+        $search = array_search($name, get_class_methods($this->redis));
+
+        if (empty($search)) {
+            throw new GeneralException('undefined method:'.$name);
+        }
         $data = call_user_func_array(array($this->redis, $name), $arguments);
         $profiler->end();
         return $data;