code: def test_non_existing_config_file_created(self):
      self.assertFalse(isfile(NiftyNetGlobalConfigTestBase.config_file))
      global_config = NiftyNetGlobalConfig().setup()
      self.assertTrue(isfile(NiftyNetGlobalConfigTestBase.config_file))
      self.assertEqual(
          global_config.get_niftynet_config_folder(),
          NiftyNetGlobalConfigTestBase.config_home,
      )
  
imports: from glob import glob
  from os import remove, makedirs
  from os.path import expanduser, join, isdir, isfile
  from os.path import getmtime
  from shutil import rmtree
  from unittest import TestCase
  from niftynet.utilities.niftynet_global_config import NiftyNetGlobalConfig
label_desc: Use image node_id 1 for calling the TestNonExistingConfigFileCreated obj's underlying member method code with example usage: obj.test_non_existing_config_file_created() without return types