arglist = ['historical', any_date.isoformat()] + arglist

    try:

        config = config_from(os.devnull, arglist)

    except SystemExit:

        pass

    else:

        assert not vars(config.args), "bad arglist succeeded"

@pytest.mark.parametrize('date_s,expect_year,expect_month,expect_day', [

    ('5', 1965, 7, 5),

    ('05', 1965, 7, 5),

    ('14', 1965, 7, 14),

    ('15', 1965, 7, 15),

    ('16', 1965, 6, 16),

    ('3-6', 1965, 3, 6),

    ('11.10', 1964, 11, 10),

    ('07-14', 1965, 7, 14),

    ('07/15', 1965, 7, 15),

    ('7.16', 1964, 7, 16),

    ('917/12/12', 917, 12, 12),

    ('2017-11-1', 2017, 11, 1),

])

def test_good_date_parsing(date_s, expect_year, expect_month, expect_day):

    oxrlib.config.Configuration.TODAY = datetime.date(1965, 7, 15)

    config = config_from(os.devnull, ['historical', date_s])

    actual_date = config.args.date

    assert actual_date.year == expect_year

    assert actual_date.month == expect_month

    assert actual_date.day == expect_day

@pytest.mark.parametrize('date_s', [

    '99',

    '8-88',

    '77-7',

    '0xf-1-2',

    '0b1-3-4',

    '2017/5.9',

    '2018-6/10',

    '1-2-3-4',

    '12/11/10',

])

def test_bad_date_parsing(date_s):

    try:

        config = config_from(os.devnull, ['historical', date_s])

    except SystemExit:

        pass

    else:

        assert not config.args.date, "date parsed from {!r}".format(date_s)