def METHOD_NAME(self):
    # For all 'equivalent' combinations:
    #  Make dir with encoded, chdir with unicode, checkdir with encoded
    #  (or unicode/encoded/unicode, etc
    ext = ".dir"
    self._do_directory(TESTFN_UNICODE+ext, TESTFN_UNICODE+ext)
    # Our directory name that can't use a non-unicode name.
    if TESTFN_UNENCODABLE is not None:
        self._do_directory(TESTFN_UNENCODABLE+ext,
                           TESTFN_UNENCODABLE+ext)