def METHOD_NAME(self):
    if hasattr(compat_str, 'casefold'):
        # don't bother to test str.casefold() (again)
        return
    # thanks https://bugs.python.org/file24232/casefolding.patch
    self.assertEqual(compat_casefold('hello'), 'hello')
    self.assertEqual(compat_casefold('hELlo'), 'hello')
    self.assertEqual(compat_casefold('ß'), 'ss')
    self.assertEqual(compat_casefold('ﬁ'), 'fi')
    self.assertEqual(compat_casefold('\u03a3'), '\u03c3')
    self.assertEqual(compat_casefold('A\u0345\u03a3'), 'a\u03b9\u03c3')