code: def test_batch_template(batch_launcher, work_dir):
      launcher = batch_launcher
      batch_file = os.path.join(work_dir, launcher.batch_file_name)
      assert launcher.batch_file == batch_file
      launcher.write_batch_script(1)
      assert os.path.isfile(batch_file)
  
imports: import logging
  import os
  import sys
  import time
  from subprocess import Popen
  import entrypoints
  import pytest
  from traitlets.config import Config
  from ipyparallel.cluster import launcher
label_desc: Use image node_id 11 for calling a global function with example usage: test_batch_template(batch_launcher, work_dir) without return types