recurring 0.1.5

A recurring event series implementation based on jiff
Documentation 
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use jiff::ToSpan;
use jiff::civil::{DateTime, date, time};
use pretty_assertions::assert_eq;
use recurring::pattern::Daily;
use recurring::{DateTimeRange, Pattern};

#[test]
fn daily_next_after() {
    let start = date(2025, 1, 1).at(0, 0, 0, 0);
    let end = date(2025, 2, 1).at(0, 0, 0, 0);
    let range = DateTimeRange::from(start..end);
    let daily = Daily::new(2);
    assert_eq!(
        daily.next_after(DateTime::MIN, range),
        Some(date(2025, 1, 1).at(0, 0, 0, 0))
    );
    assert_eq!(
        daily.next_after(range.start() - 1.nanosecond(), range),
        Some(date(2025, 1, 1).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.next_after(range.start(), range),
        Some(date(2025, 1, 3).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.next_after(date(2025, 1, 1).at(0, 30, 0, 0), range),
        Some(date(2025, 1, 3).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.next_after(range.end() - 1.day().nanoseconds(1), range),
        Some(date(2025, 1, 31).at(0, 0, 0, 0))
    );
    assert_eq!(daily.next_after(range.end() - 1.day(), range), None);
    assert_eq!(daily.next_after(range.end(), range), None);
    assert_eq!(daily.next_after(DateTime::MAX, range), None);
}

#[test]
fn daily_at_next_after() {
    let start = date(2025, 1, 1).at(0, 0, 0, 0);
    let end = date(2025, 2, 1).at(0, 0, 0, 0);
    let range = DateTimeRange::from(start..end);
    let daily = Daily::new(2).at(time(12, 0, 0, 0));
    assert_eq!(
        daily.next_after(DateTime::MIN, range),
        Some(date(2025, 1, 1).at(12, 0, 0, 0))
    );
    assert_eq!(
        daily.next_after(range.start() - 1.nanosecond(), range),
        Some(date(2025, 1, 1).at(12, 0, 0, 0))
    );

    assert_eq!(
        daily.next_after(range.start(), range),
        Some(date(2025, 1, 1).at(12, 0, 0, 0))
    );

    assert_eq!(
        daily.next_after(date(2025, 1, 1).at(12, 0, 0, 0), range),
        Some(date(2025, 1, 3).at(12, 0, 0, 0))
    );

    assert_eq!(
        daily.next_after(date(2025, 1, 1).at(11, 59, 59, 999), range),
        Some(date(2025, 1, 1).at(12, 0, 0, 0))
    );

    assert_eq!(
        daily.next_after(range.end() - 2.days(), range),
        Some(date(2025, 1, 31).at(12, 0, 0, 0))
    );
    assert_eq!(daily.next_after(range.end() - 12.hours(), range), None);
    assert_eq!(daily.next_after(range.end(), range), None);
    assert_eq!(daily.next_after(DateTime::MAX, range), None);
}

#[test]
fn daily_previous_before() {
    let start = date(2025, 1, 1).at(0, 0, 0, 0);
    let end = date(2025, 2, 1).at(0, 0, 0, 0);
    let range = DateTimeRange::from(start..end);
    let daily = Daily::new(2);
    assert_eq!(daily.previous_before(DateTime::MIN, range), None);
    assert_eq!(daily.previous_before(range.start(), range), None);
    assert_eq!(
        daily.previous_before(range.start() + 1.second(), range),
        Some(date(2025, 1, 1).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.previous_before(date(2025, 1, 1).at(0, 30, 0, 0), range),
        Some(date(2025, 1, 1).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.previous_before(date(2025, 1, 4).at(0, 0, 0, 0), range),
        Some(date(2025, 1, 3).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.previous_before(range.end(), range),
        Some(date(2025, 1, 31).at(0, 0, 0, 0))
    );
}

#[test]
fn daily_at_previous_before() {
    let start = date(2025, 1, 1).at(0, 0, 0, 0);
    let end = date(2025, 2, 1).at(0, 0, 0, 0);
    let range = DateTimeRange::from(start..end);
    let daily = Daily::new(2).at(time(12, 0, 0, 0));
    assert_eq!(daily.previous_before(DateTime::MIN, range), None);
    assert_eq!(daily.previous_before(range.start(), range), None);
    assert_eq!(
        daily.previous_before(range.start() + 12.hours(), range),
        None
    );
    assert_eq!(
        daily.previous_before(range.start() + 12.hours().seconds(1), range),
        Some(date(2025, 1, 1).at(12, 0, 0, 0))
    );

    assert_eq!(
        daily.previous_before(date(2025, 1, 4).at(0, 0, 0, 0), range),
        Some(date(2025, 1, 3).at(12, 0, 0, 0))
    );

    assert_eq!(
        daily.previous_before(range.end(), range),
        Some(date(2025, 1, 31).at(12, 0, 0, 0))
    );
}

#[test]
fn daily_closest_to() {
    let start = date(2025, 1, 1).at(0, 0, 0, 0);
    let end = date(2025, 2, 1).at(0, 0, 0, 0);
    let range = DateTimeRange::from(start..end);
    let daily = Daily::new(2);

    assert_eq!(
        daily.closest_to(date(2025, 1, 1).at(0, 0, 0, 0), range),
        Some(date(2025, 1, 1).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.closest_to(date(2025, 1, 2).at(0, 0, 0, 0), range),
        Some(date(2025, 1, 3).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.closest_to(date(2025, 1, 2).at(0, 0, 0, 0) - 1.nanosecond(), range),
        Some(date(2025, 1, 1).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.closest_to(date(2024, 12, 31).at(0, 30, 0, 0), range),
        Some(date(2025, 1, 1).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.closest_to(date(2025, 2, 1).at(0, 0, 0, 0), range),
        Some(date(2025, 1, 31).at(0, 0, 0, 0))
    );

    assert_eq!(
        daily.closest_to(date(2025, 2, 10).at(0, 30, 0, 0), range),
        Some(date(2025, 1, 31).at(0, 0, 0, 0))
    );
}

#[test]
fn daily_closest_to_datetime_max() {
    let start = date(2025, 1, 1).at(0, 0, 0, 0);
    let range = DateTimeRange::from(start..DateTime::MAX);
    let daily = Daily::new(2);

    assert_eq!(
        daily.closest_to(DateTime::MAX, range),
        Some(date(9999, 12, 30).at(0, 0, 0, 0))
    );
}