code: def test_show_help(self):
      # smoke test, just makes sure some help is displayed
      self.addCleanup(log.set_threshold, log._global_log.threshold)
      dist = Distribution()
      sys.argv = []
      dist.help = 1
      dist.script_name = "setup.py"
      with captured_stdout() as s:
          dist.parse_command_line()
  
      output = [
          line
          for line in s.getvalue().split("\n")
          if line.strip() != ""
      ]
      self.assertTrue(output)
  
imports: import os
  import StringIO
  import sys
  import unittest
  import warnings
  import textwrap
  from distutils.dist import Distribution, fix_help_options
  from distutils.cmd import Command
  import distutils.dist
  from test.test_support import TESTFN, captured_stdout, run_unittest, unlink
  from distutils.tests import support
  from distutils import log
label_desc: Use image node_id 16 for calling the MetadataTestCase obj's underlying member method code with example usage: obj.test_show_help() without return types