code: def test_rename(self):
      for name in self.files:
          os.rename(name, "tmp")
          os.rename("tmp", name)
  
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 8 for calling the UnicodeFileTests obj's underlying member method code with example usage: obj.test_rename() without return types