code: def test_directory(self):
      dirname = os.path.join(
          os_helper.TESTFN, "Gr\xfc\xdf-\u66e8\u66e9\u66eb"
      )
      filename = "\xdf-\u66e8\u66e9\u66eb"
      with os_helper.temp_cwd(dirname):
          with open(filename, "wb") as f:
              f.write((filename + "\n").encode("utf-8"))
          os.access(filename, os.R_OK)
          os.remove(filename)
  
imports: import os
  import sys
  import unittest
  import warnings
  from unicodedata import normalize
  from test.support import os_helper
  from test import support
label_desc: Use image node_id 9 for calling the UnicodeFileTests obj's underlying member method code with example usage: obj.test_directory() without return types