code: def test_update_job(self):
      worker_manager = WorkerManager("localhost", ["gpu"])
      worker_manager.add_worker(self.worker1)
      worker_manager.add_worker(self.worker2)
  
      job = InitializedJob(
          job_address="192.168.0.1:{}".format(2000),
          worker_heartbeat_address="192.168.0.1:{}".format(2000 + 1),
          ping_heartbeat_address="192.168.0.1:{}".format(2000 + 3),
          worker_address="192.168.0.1:8000",
          pid=2000,
      )
      worker_manager.update_job(
          "192.168.0.1:1000", job, "192.168.0.1:8000"
      )
  
      current_job_address = set(
          list(
              worker_manager.worker_vacant_jobs[
                  "192.168.0.1:8000"
              ].keys()
          )
      )
      self.assertEqual(
          current_job_address,
          set(
              [
                  "192.168.0.1:1001",
                  "192.168.0.1:1002",
                  "192.168.0.1:1003",
                  "192.168.0.1:2000",
              ]
          ),
      )
      all_job_address = set(
          list(
              worker_manager.worker_vacant_jobs[
                  self.worker1.worker_address
              ].keys()
          )
          + list(
              worker_manager.worker_vacant_jobs[
                  self.worker2.worker_address
              ].keys()
          )
      )
      self.assertEqual(
          all_job_address,
          set(
              [
                  "192.168.0.1:1001",
                  "192.168.0.1:1002",
                  "192.168.0.1:1003",
                  "192.168.0.1:2000",
                  "192.168.0.2:1000",
                  "192.168.0.2:1001",
                  "192.168.0.2:1002",
                  "192.168.0.2:1003",
              ]
          ),
      )
  
      worker_manager.remove_worker(self.worker2.worker_address)
      self.assertEqual(4, len(self.worker1.initialized_jobs))
  
file_path: PARL/parl/remote/tests/gpu/worker_manager_test.py
imports: import unittest
  import socket
  from parl.remote.worker_manager import WorkerManager
  from parl.remote.message import InitializedWorker, InitializedJob, AllocatedCpu, AllocatedGpu
  from parl.utils.test_utils import XparlTestCase
label_desc: Use image node_id 5 for calling the ImportTest obj's underlying member method code with example usage: obj.test_update_job() without return types