code: def test_debug_mode(self):
      # this covers the code called when DEBUG is set
      sys.argv = ["setup.py", "--name"]
      with captured_stdout() as stdout:
          distutils.core.setup(name="bar")
      stdout.seek(0)
      self.assertEqual(stdout.read(), "bar\n")
  
      distutils.core.DEBUG = True
      try:
          with captured_stdout() as stdout:
              distutils.core.setup(name="bar")
      finally:
          distutils.core.DEBUG = False
      stdout.seek(0)
      wanted = "options (after parsing config files):\n"
      self.assertEqual(stdout.readlines()[0], wanted)
  
imports: import StringIO
  import distutils.core
  import os
  import shutil
  import sys
  import test.test_support
  from test.test_support import captured_stdout, run_unittest
  import unittest
  from distutils.tests import support
  from distutils import log
label_desc: Use image node_id 7 for calling the CoreTestCase obj's underlying member method code with example usage: obj.test_debug_mode() without return types