def METHOD_NAME():
    ret = xargs.partition(
        ('ninechars',), (
            # Just match the end (with spaces)
            '.' * 5, '.' * 4,
            # Just match the end (single arg)
            '.' * 10,
            # Goes over the end
            '.' * 5,
            '.' * 6,
        ),
        1,
        _max_length=21,
    )
    assert ret == (
        ('ninechars', '.' * 5, '.' * 4),
        ('ninechars', '.' * 10),
        ('ninechars', '.' * 5),
        ('ninechars', '.' * 6),
    )