def METHOD_NAME(self):
    # Test handling of GNU style scanning mode.
    cmdline = ['-a', 'arg1', '-b', '1', '--alpha', '--beta=2']
    # GNU style
    opts, args = getopt.gnu_getopt(cmdline, 'ab:', ['alpha', 'beta='])
    self.assertEqual(args, ['arg1'])
    self.assertEqual(opts, [('-a', ''), ('-b', '1'),
                            ('--alpha', ''), ('--beta', '2')])
    # recognize "-" as an argument
    opts, args = getopt.gnu_getopt(['-a', '-', '-b', '-'], 'ab:', [])
    self.assertEqual(args, ['-'])
    self.assertEqual(opts, [('-a', ''), ('-b', '-')])
    # Posix style via +
    opts, args = getopt.gnu_getopt(cmdline, '+ab:', ['alpha', 'beta='])
    self.assertEqual(opts, [('-a', '')])
    self.assertEqual(args, ['arg1', '-b', '1', '--alpha', '--beta=2'])
    # Posix style via POSIXLY_CORRECT
    self.env["POSIXLY_CORRECT"] = "1"
    opts, args = getopt.gnu_getopt(cmdline, 'ab:', ['alpha', 'beta='])
    self.assertEqual(opts, [('-a', '')])
    self.assertEqual(args, ['arg1', '-b', '1', '--alpha', '--beta=2'])