code: def setUp(self):
      try:
          os.mkdir(os_helper.TESTFN)
      except FileExistsError:
          pass
      self.addCleanup(os_helper.rmtree, os_helper.TESTFN)
  
      files = set()
      for name in self.files:
          name = os.path.join(os_helper.TESTFN, self.norm(name))
          with open(name, "wb") as f:
              f.write((name + "\n").encode("utf-8"))
          os.stat(name)
          files.add(name)
      self.files = files
  
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 1 for calling the UnicodeFileTests obj's underlying member method code with example usage: obj.setUp() without return types