def METHOD_NAME(self):
    sf0 = set(self.files)
    f1 = os.listdir(test_support.TESTFN)
    f2 = os.listdir(unicode(test_support.TESTFN,
                            sys.getfilesystemencoding()))
    sf2 = set(os.path.join(unicode(test_support.TESTFN), f) for f in f2)
    self.assertEqual(sf0, sf2)
    self.assertEqual(len(f1), len(f2))