code: def test_global_running(self):
      self.add_worker(n_cpu=1)
      self.assertEqual(actor.add(1, 2), 13)
      master.exit()
      os.killpg(os.getpgid(p_worker.pid), signal.SIGTERM)
  
imports: import unittest
  from parl.utils import logger
  import parl
  from parl.remote.client import disconnect
  from parl.remote.master import Master
  from parl.utils import get_free_tcp_port
  from parl.remote.worker import Worker
  from parl.utils.test_utils import XparlTestCase
  import time
  import threading
  import os
  import signal
  import subprocess
label_desc: Use image node_id 1 for calling the TestRecursive_actor obj's underlying member method code with example usage: obj.test_global_running() without return types