code: def _test():
      import doctest
  
      failure_count = doctest.testmod()[0]
      if failure_count:
          sys.exit(-1)
  
file_path: spark/dev/sparktestsupport/utils.py
imports: import os
  import sys
  import subprocess
  from sparktestsupport import modules
  from sparktestsupport.shellutils import run_cmd
  from sparktestsupport.toposort import toposort_flatten
label_desc: Use image node_id 5 for calling a global function with example usage: _test() without return types