code: def verify_application(self):
      app = random.choice(self.applications)
      for _ in range(100):
          try:
              r = requests.get("http://127.0.0.1:8000/" + app)
              assert r.text == app
          except Exception:
              print("Request to {} failed.".format(app))
              time.sleep(0.1)
  
imports: import asyncio
  import logging
  import os
  import random
  import string
  import time
  from typing import List
  import requests
  import ray
  from ray import serve
  from ray.serve.context import _get_global_client
  from ray.cluster_utils import Cluster
  from ray._private.test_utils import safe_write_to_results_json
label_desc: Use image node_id 4 for calling the RandomTest obj's underlying member method code with example usage: obj.verify_application() without return types