code: def test_get_job(self):
      p = fiber.Process(name="test_get_job")
      popen = fspawn.Popen(p, launch=False)
  
      job = popen._get_job(["echo", "hello fiber"])
      assert job.command == ["echo", "hello fiber"]
      # assert job.image == "fiber-test:latest"
      # by default, do image should be provided. Backend should decide if
      # to use default image or current container image.
      assert job.image is None
  
file_path: fiber/tests/test_popen.py
imports: import multiprocessing
  import io
  import re
  import time
  import logging
  import socket
  import fiber
  import fiber.popen_fiber_spawn
  import docker
  import pytest
label_desc: Use image node_id 4 for calling the TestPopen obj's underlying member method code with example usage: obj.test_get_job() without return types