module time

fn test_days_from_unix_epoch() {
    s := '2000-05-10 22:11:03'
    time_test := parse(s) or {
        eprintln('> failing format: ${s} | err: ${err}')
        assert false
        return
    }
    one_day_in_seconds := 86400

    assert time_test.days_from_unix_epoch() == 11087
    assert time_test.days_from_unix_epoch() == int(time_test.unix / one_day_in_seconds)
    assert days_from_unix_epoch(1970, 1, 1) == 0
    assert days_from_unix_epoch(1970, 2, 1) == 31
    assert days_from_unix_epoch(1970, 3, 1) == 59
    assert days_from_unix_epoch(2022, 11, 10) == 19306
}

fn test_date_from_days_after_unix_epoch() {
    assert date_from_days_after_unix_epoch(11087).year == 2000
    assert date_from_days_after_unix_epoch(11087).month == 5
    assert date_from_days_after_unix_epoch(11087).day == 10
    assert date_from_days_after_unix_epoch(1).year == 1970
    assert date_from_days_after_unix_epoch(1).month == 1
    assert date_from_days_after_unix_epoch(1).day == 2

    assert date_from_days_after_unix_epoch(31).year == 1970
    assert date_from_days_after_unix_epoch(31).month == 2
    assert date_from_days_after_unix_epoch(31).day == 1

    assert date_from_days_after_unix_epoch(59).year == 1970
    assert date_from_days_after_unix_epoch(59).month == 3
    assert date_from_days_after_unix_epoch(59).day == 1
}