extern crate chrono;
extern crate chrono_tz;
extern crate rrule;

use chrono::prelude::*;
use chrono_tz::{Tz, UTC};
use rrule::{Frequenzy, ParsedOptions, RRule};

#[cfg(test)]
mod test {
    use super::*;

    fn ymd_hms(
        year: i32,
        month: u32,
        day: u32,
        hour: u32,
        minute: u32,
        second: u32,
    ) -> DateTime<Tz> {
        UTC.ymd(year, month, day).and_hms(hour, minute, second)
    }

    fn test_recurring(options: ParsedOptions, expected_dates: &Vec<DateTime<Tz>>) {
        let mut rrule = RRule::new(options);
        let res = rrule.all();

        assert_eq!(
            res.len(),
            expected_dates.len(),
            "Expected number of returned dates to be equal to the expected"
        );

        println!("Acutal: {:?}", res);
        for (actual, exptected) in res.iter().zip(expected_dates) {
            assert_eq!(actual, exptected);
        }
    }

    #[test]
    fn yearly() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1998, 9, 2, 9, 0, 0),
                ymd_hms(1999, 9, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_interval() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1999, 9, 2, 9, 0, 0),
                ymd_hms(2001, 9, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_interval_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 40,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(2037, 9, 2, 9, 0, 0),
                ymd_hms(2077, 9, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_easter() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: Some(0),
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 12, 9, 0, 0),
                ymd_hms(1999, 4, 4, 9, 0, 0),
                ymd_hms(2000, 4, 23, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_easterpos() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: Some(1),
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 13, 9, 0, 0),
                ymd_hms(1999, 4, 5, 9, 0, 0),
                ymd_hms(2000, 4, 24, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_easterpos_neg() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: Some(-2),
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1999, 4, 2, 9, 0, 0),
                ymd_hms(2000, 4, 21, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_month() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 2, 9, 0, 0),
                ymd_hms(1998, 3, 2, 9, 0, 0),
                ymd_hms(1999, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 3, 9, 0, 0),
                ymd_hms(1997, 10, 1, 9, 0, 0),
                ymd_hms(1997, 10, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_month_and_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![5, 7],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 5, 9, 0, 0),
                ymd_hms(1998, 1, 7, 9, 0, 0),
                ymd_hms(1998, 3, 5, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
                ymd_hms(1997, 9, 9, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_nweekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![vec![1, 1], vec![3, -1]],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 25, 9, 0, 0),
                ymd_hms(1998, 1, 6, 9, 0, 0),
                ymd_hms(1998, 12, 31, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_nweekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![vec![1, 13], vec![3, -13]],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 10, 2, 9, 0, 0),
                ymd_hms(1998, 3, 31, 9, 0, 0),
                ymd_hms(1998, 10, 8, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_month_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 1, 6, 9, 0, 0),
                ymd_hms(1998, 1, 8, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_month_and_nweekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![vec![1, 1], vec![3, -1]],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 6, 9, 0, 0),
                ymd_hms(1998, 1, 29, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_month_and_nweekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![vec![1, 3], vec![3, -3]],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 15, 9, 0, 0),
                ymd_hms(1998, 1, 20, 9, 0, 0),
                ymd_hms(1998, 3, 12, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 2, 3, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_month_and_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
                ymd_hms(2001, 3, 1, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_yeardayneg() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![-365, -266, -166, -1],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_month_and_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(4),
            bymonth: vec![4, 7],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
                ymd_hms(1999, 4, 10, 9, 0, 0),
                ymd_hms(1999, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_weekno() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![20],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 5, 11, 9, 0, 0),
                ymd_hms(1998, 5, 12, 9, 0, 0),
                ymd_hms(1998, 5, 13, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_weekno_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 29, 9, 0, 0),
                ymd_hms(1999, 1, 4, 9, 0, 0),
                ymd_hms(2000, 1, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_weekno_and_weekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![52],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 9, 0, 0),
                ymd_hms(1998, 12, 27, 9, 0, 0),
                ymd_hms(2000, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_weekno_and_weekday_last() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![-1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 9, 0, 0),
                ymd_hms(1999, 1, 3, 9, 0, 0),
                ymd_hms(2000, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_weekno_and_weekday53_last() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![53],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 12, 28, 9, 0, 0),
                ymd_hms(2004, 12, 27, 9, 0, 0),
                ymd_hms(2009, 12, 28, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_hour() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 0),
                ymd_hms(1998, 9, 2, 6, 0, 0),
                ymd_hms(1998, 9, 2, 18, 0, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 0),
                ymd_hms(1997, 9, 2, 9, 18, 0),
                ymd_hms(1998, 9, 2, 9, 6, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 6),
                ymd_hms(1997, 9, 2, 9, 0, 18),
                ymd_hms(1998, 9, 2, 9, 0, 6),
            ],
        );
    }

    #[test]
    fn yearly_by_hour_and_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 0),
                ymd_hms(1997, 9, 2, 18, 18, 0),
                ymd_hms(1998, 9, 2, 6, 6, 0),
            ],
        );
    }

    #[test]
    fn yearly_by_hour_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 6),
                ymd_hms(1997, 9, 2, 18, 0, 18),
                ymd_hms(1998, 9, 2, 6, 0, 6),
            ],
        );
    }

    #[test]
    fn yearly_by_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 6),
                ymd_hms(1997, 9, 2, 9, 6, 18),
                ymd_hms(1997, 9, 2, 9, 18, 6),
            ],
        );
    }

    #[test]
    fn yearly_by_hour_and_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![9],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 6),
                ymd_hms(1997, 9, 2, 18, 6, 18),
                ymd_hms(1997, 9, 2, 18, 18, 6),
            ],
        );
    }

    #[test]
    fn yearly_by_setpos() {
        let options = ParsedOptions {
            freq: Frequenzy::Yearly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![3, -3],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![15],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 11, 15, 18, 0, 0),
                ymd_hms(1998, 2, 15, 6, 0, 0),
                ymd_hms(1998, 11, 15, 18, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 10, 2, 9, 0, 0),
                ymd_hms(1997, 11, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_interval() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 11, 2, 9, 0, 0),
                ymd_hms(1998, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_interval_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 18,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1999, 3, 2, 9, 0, 0),
                ymd_hms(2000, 9, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_easter() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: Some(0),
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 12, 9, 0, 0),
                ymd_hms(1999, 4, 4, 9, 0, 0),
                ymd_hms(2000, 4, 23, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_easterpos() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: Some(1),
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 13, 9, 0, 0),
                ymd_hms(1999, 4, 5, 9, 0, 0),
                ymd_hms(2000, 4, 24, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_easterpos_neg() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: Some(-2),
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1999, 4, 2, 9, 0, 0),
                ymd_hms(2000, 4, 21, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_neg_by_monthday_janfeb_for_nonleapyear() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(2013, 12, 1, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![-1],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(2013, 12, 31, 9, 0, 0),
                ymd_hms(2014, 1, 31, 9, 0, 0),
                ymd_hms(2014, 2, 28, 9, 0, 0),
                ymd_hms(2014, 3, 31, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_neg_by_monthday_janfeb_for_leapyear() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(2015, 12, 1, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![-1],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(2015, 12, 31, 9, 0, 0),
                ymd_hms(2016, 1, 31, 9, 0, 0),
                ymd_hms(2016, 2, 29, 9, 0, 0),
                ymd_hms(2016, 3, 31, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_neg_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(6),
            bymonth: vec![],
            dtstart: ymd_hms(2015, 12, 1, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![-1, -3],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(2015, 12, 29, 9, 0, 0),
                ymd_hms(2015, 12, 31, 9, 0, 0),
                ymd_hms(2016, 1, 29, 9, 0, 0),
                ymd_hms(2016, 1, 31, 9, 0, 0),
                ymd_hms(2016, 2, 27, 9, 0, 0),
                ymd_hms(2016, 2, 29, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_month() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 2, 9, 0, 0),
                ymd_hms(1998, 3, 2, 9, 0, 0),
                ymd_hms(1999, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 3, 9, 0, 0),
                ymd_hms(1997, 10, 1, 9, 0, 0),
                ymd_hms(1997, 10, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_month_and_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![5, 7],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 5, 9, 0, 0),
                ymd_hms(1998, 1, 7, 9, 0, 0),
                ymd_hms(1998, 3, 5, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
                ymd_hms(1997, 9, 9, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_nweekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![vec![1, 1], vec![3, -1]],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 25, 9, 0, 0),
                ymd_hms(1997, 10, 7, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_nweekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![vec![1, 3], vec![3, -3]],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 11, 9, 0, 0),
                ymd_hms(1997, 9, 16, 9, 0, 0),
                ymd_hms(1997, 10, 16, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_month_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 1, 6, 9, 0, 0),
                ymd_hms(1998, 1, 8, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_month_and_nweekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![vec![1, 1], vec![3, -1]],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 6, 9, 0, 0),
                ymd_hms(1998, 1, 29, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_month_and_nweekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![vec![1, 3], vec![3, -3]],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 15, 9, 0, 0),
                ymd_hms(1998, 1, 20, 9, 0, 0),
                ymd_hms(1998, 3, 12, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 2, 3, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_month_and_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
                ymd_hms(2001, 3, 1, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_yeardayneg() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![-365, -266, -166, -1],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_month_and_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(4),
            bymonth: vec![4, 7],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
                ymd_hms(1999, 4, 10, 9, 0, 0),
                ymd_hms(1999, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_weekno() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![20],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 5, 11, 9, 0, 0),
                ymd_hms(1998, 5, 12, 9, 0, 0),
                ymd_hms(1998, 5, 13, 9, 0, 0),
            ],
        );
    }

    // That's a nice one. The first days of week number one
    // may be in the last year.
    #[test]
    fn monthly_by_weekno_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 29, 9, 0, 0),
                ymd_hms(1999, 1, 4, 9, 0, 0),
                ymd_hms(2000, 1, 3, 9, 0, 0),
            ],
        );
    }

    // Another nice test. The last days of week number 52/53
    // may be in the next year.
    #[test]
    fn monthly_by_weekno_and_weekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![52],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 9, 0, 0),
                ymd_hms(1998, 12, 27, 9, 0, 0),
                ymd_hms(2000, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_weekno_and_weekday_last() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![-1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 9, 0, 0),
                ymd_hms(1999, 1, 3, 9, 0, 0),
                ymd_hms(2000, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_weekno_and_weekday53() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![53],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 12, 28, 9, 0, 0),
                ymd_hms(2004, 12, 27, 9, 0, 0),
                ymd_hms(2009, 12, 28, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_hour() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 0),
                ymd_hms(1997, 10, 2, 6, 0, 0),
                ymd_hms(1997, 10, 2, 18, 0, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 0),
                ymd_hms(1997, 9, 2, 9, 18, 0),
                ymd_hms(1997, 10, 2, 9, 6, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 6),
                ymd_hms(1997, 9, 2, 9, 0, 18),
                ymd_hms(1997, 10, 2, 9, 0, 6),
            ],
        );
    }

    #[test]
    fn monthly_by_hour_and_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 0),
                ymd_hms(1997, 9, 2, 18, 18, 0),
                ymd_hms(1997, 10, 2, 6, 6, 0),
            ],
        );
    }

    #[test]
    fn monthly_by_hour_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 6),
                ymd_hms(1997, 9, 2, 18, 0, 18),
                ymd_hms(1997, 10, 2, 6, 0, 6),
            ],
        );
    }

    #[test]
    fn monthly_by_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 6),
                ymd_hms(1997, 9, 2, 9, 6, 18),
                ymd_hms(1997, 9, 2, 9, 18, 6),
            ],
        );
    }

    #[test]
    fn monthly_by_hour_and_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![2],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 6),
                ymd_hms(1997, 9, 2, 18, 6, 18),
                ymd_hms(1997, 9, 2, 18, 18, 6),
            ],
        );
    }

    #[test]
    fn monthly_by_setpos() {
        let options = ParsedOptions {
            freq: Frequenzy::Monthly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![3, -3],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![13, 17],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 13, 18, 0, 0),
                ymd_hms(1997, 9, 17, 6, 0, 0),
                ymd_hms(1997, 10, 13, 18, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 9, 9, 0, 0),
                ymd_hms(1997, 9, 16, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_interval() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 16, 9, 0, 0),
                ymd_hms(1997, 9, 30, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_interval_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 20,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1998, 1, 20, 9, 0, 0),
                ymd_hms(1998, 6, 9, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_month() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(6),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 6, 9, 0, 0),
                ymd_hms(1998, 1, 13, 9, 0, 0),
                ymd_hms(1998, 1, 20, 9, 0, 0),
                ymd_hms(1998, 1, 27, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
                ymd_hms(1998, 3, 10, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 3, 9, 0, 0),
                ymd_hms(1997, 10, 1, 9, 0, 0),
                ymd_hms(1997, 10, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_month_and_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![5, 7],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 5, 9, 0, 0),
                ymd_hms(1998, 1, 7, 9, 0, 0),
                ymd_hms(1998, 3, 5, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
                ymd_hms(1997, 9, 9, 9, 0, 0),
            ],
        );
    }

    // ! why isnt this using nweekday ???
    #[test]
    fn weekly_by_nweekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
                ymd_hms(1997, 9, 9, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_month_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 1, 6, 9, 0, 0),
                ymd_hms(1998, 1, 8, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 2, 3, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_month_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
                ymd_hms(2001, 3, 1, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_yeardayneg() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![-365, -266, -166, -1],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_month_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(4),
            bymonth: vec![1, 7],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
                ymd_hms(1999, 1, 1, 9, 0, 0),
                ymd_hms(1999, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_weekno() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![20],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 5, 11, 9, 0, 0),
                ymd_hms(1998, 5, 12, 9, 0, 0),
                ymd_hms(1998, 5, 13, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_weekno_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 29, 9, 0, 0),
                ymd_hms(1999, 1, 4, 9, 0, 0),
                ymd_hms(2000, 1, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_weekno_and_weekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![52],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 9, 0, 0),
                ymd_hms(1998, 12, 27, 9, 0, 0),
                ymd_hms(2000, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_weekno_and_weekday_last() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![-1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 9, 0, 0),
                ymd_hms(1999, 1, 3, 9, 0, 0),
                ymd_hms(2000, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_weekno_and_weekday53() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![53],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 12, 28, 9, 0, 0),
                ymd_hms(2004, 12, 27, 9, 0, 0),
                ymd_hms(2009, 12, 28, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_hour() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 0),
                ymd_hms(1997, 9, 9, 6, 0, 0),
                ymd_hms(1997, 9, 9, 18, 0, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 0),
                ymd_hms(1997, 9, 2, 9, 18, 0),
                ymd_hms(1997, 9, 9, 9, 6, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 6),
                ymd_hms(1997, 9, 2, 9, 0, 18),
                ymd_hms(1997, 9, 9, 9, 0, 6),
            ],
        );
    }

    #[test]
    fn weekly_by_hour_and_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 0),
                ymd_hms(1997, 9, 2, 18, 18, 0),
                ymd_hms(1997, 9, 9, 6, 6, 0),
            ],
        );
    }

    #[test]
    fn weekly_by_hour_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 6),
                ymd_hms(1997, 9, 2, 18, 0, 18),
                ymd_hms(1997, 9, 9, 6, 0, 6),
            ],
        );
    }

    #[test]
    fn weekly_by_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 6),
                ymd_hms(1997, 9, 2, 9, 6, 18),
                ymd_hms(1997, 9, 2, 9, 18, 6),
            ],
        );
    }

    #[test]
    fn weekly_by_hour_and_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(5),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 6),
                ymd_hms(1997, 9, 2, 18, 6, 18),
                ymd_hms(1997, 9, 2, 18, 18, 6),
                ymd_hms(1997, 9, 2, 18, 18, 18),
                ymd_hms(1997, 9, 9, 6, 6, 6),
            ],
        );
    }

    #[test]
    fn weekly_by_setpos() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![6, 18],
            bysetpos: vec![3, -3],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 0),
                ymd_hms(1997, 9, 4, 6, 0, 0),
                ymd_hms(1997, 9, 9, 18, 0, 0),
            ],
        );
    }

    #[test]
    fn daily() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 3, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_interval() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
                ymd_hms(1997, 9, 6, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_interval_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 92,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 12, 3, 9, 0, 0),
                ymd_hms(1998, 3, 5, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_month() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 1, 2, 9, 0, 0),
                ymd_hms(1998, 1, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 3, 9, 0, 0),
                ymd_hms(1997, 10, 1, 9, 0, 0),
                ymd_hms(1997, 10, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_month_and_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![5, 7],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 5, 9, 0, 0),
                ymd_hms(1998, 1, 7, 9, 0, 0),
                ymd_hms(1998, 3, 5, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
                ymd_hms(1997, 9, 9, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_month_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 1, 6, 9, 0, 0),
                ymd_hms(1998, 1, 8, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 2, 3, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_month_and_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 3, 3, 9, 0, 0),
                ymd_hms(2001, 3, 1, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_yeardayneg() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![-365, -266, -166, -1],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_month_and_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(4),
            bymonth: vec![1, 7],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
                ymd_hms(1999, 1, 1, 9, 0, 0),
                ymd_hms(1999, 7, 19, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_weekno() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![20],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 5, 11, 9, 0, 0),
                ymd_hms(1998, 5, 12, 9, 0, 0),
                ymd_hms(1998, 5, 13, 9, 0, 0),
            ],
        );
    }

    // That's a nice one. The first days of week number one
    // may be in the last year.
    #[test]
    fn daily_by_weekno_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 29, 9, 0, 0),
                ymd_hms(1999, 1, 4, 9, 0, 0),
                ymd_hms(2000, 1, 3, 9, 0, 0),
            ],
        );
    }

    // Another nice test. The last days of week number 52/53
    // may be in the next year.
    #[test]
    fn daily_by_weekno_and_weekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![52],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 9, 0, 0),
                ymd_hms(1998, 12, 27, 9, 0, 0),
                ymd_hms(2000, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_weekno_and_weekday_last() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![-1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 9, 0, 0),
                ymd_hms(1999, 1, 3, 9, 0, 0),
                ymd_hms(2000, 1, 2, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_weekno_and_weekday53() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![53],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 12, 28, 9, 0, 0),
                ymd_hms(2004, 12, 27, 9, 0, 0),
                ymd_hms(2009, 12, 28, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_hour() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 0),
                ymd_hms(1997, 9, 3, 6, 0, 0),
                ymd_hms(1997, 9, 3, 18, 0, 0),
            ],
        );
    }

    #[test]
    fn daily_by_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 0),
                ymd_hms(1997, 9, 2, 9, 18, 0),
                ymd_hms(1997, 9, 3, 9, 6, 0),
            ],
        );
    }

    #[test]
    fn daily_by_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 6),
                ymd_hms(1997, 9, 2, 9, 0, 18),
                ymd_hms(1997, 9, 3, 9, 0, 6),
            ],
        );
    }

    #[test]
    fn daily_by_hour_and_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 0),
                ymd_hms(1997, 9, 2, 18, 18, 0),
                ymd_hms(1997, 9, 3, 6, 6, 0),
            ],
        );
    }

    #[test]
    fn daily_by_hour_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 6),
                ymd_hms(1997, 9, 2, 18, 0, 18),
                ymd_hms(1997, 9, 3, 6, 0, 6),
            ],
        );
    }

    #[test]
    fn daily_by_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 6),
                ymd_hms(1997, 9, 2, 9, 6, 18),
                ymd_hms(1997, 9, 2, 9, 18, 6),
            ],
        );
    }

    #[test]
    fn daily_by_hour_and_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 6),
                ymd_hms(1997, 9, 2, 18, 6, 18),
                ymd_hms(1997, 9, 2, 18, 18, 6),
            ],
        );
    }

    #[test]
    fn daily_by_setpos() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![3, -3],
            byweekno: vec![],
            byminute: vec![15, 45],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 15, 0),
                ymd_hms(1997, 9, 3, 6, 45, 0),
                ymd_hms(1997, 9, 3, 18, 15, 0),
            ],
        );
    }

    #[test]
    fn hourly() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 2, 10, 0, 0),
                ymd_hms(1997, 9, 2, 11, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_interval() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 2, 11, 0, 0),
                ymd_hms(1997, 9, 2, 13, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_interval_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 769,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 10, 4, 10, 0, 0),
                ymd_hms(1997, 11, 5, 11, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_month() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 1, 0, 0),
                ymd_hms(1998, 1, 1, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 3, 0, 0, 0),
                ymd_hms(1997, 9, 3, 1, 0, 0),
                ymd_hms(1997, 9, 3, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_month_and_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![5, 7],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 5, 0, 0, 0),
                ymd_hms(1998, 1, 5, 1, 0, 0),
                ymd_hms(1998, 1, 5, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(5),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 5,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 2, 14, 0, 0),
                ymd_hms(1997, 9, 2, 19, 0, 0),
                ymd_hms(1997, 9, 4, 1, 0, 0),
                ymd_hms(1997, 9, 4, 6, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_month_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 1, 0, 0),
                ymd_hms(1998, 1, 1, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 1, 0, 0),
                ymd_hms(1998, 1, 1, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_month_and_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 1, 0, 0),
                ymd_hms(1998, 1, 1, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(8),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 12,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1997, 12, 31, 21, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 1, 1, 21, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 4, 10, 21, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
                ymd_hms(1998, 7, 19, 21, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_yeardayneg() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(8),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![-365, -266, -166, -1],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 12,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 9, 0, 0),
                ymd_hms(1997, 12, 31, 21, 0, 0),
                ymd_hms(1998, 1, 1, 9, 0, 0),
                ymd_hms(1998, 1, 1, 21, 0, 0),
                ymd_hms(1998, 4, 10, 9, 0, 0),
                ymd_hms(1998, 4, 10, 21, 0, 0),
                ymd_hms(1998, 7, 19, 9, 0, 0),
                ymd_hms(1998, 7, 19, 21, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_month_and_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(4),
            bymonth: vec![4, 7],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 10, 0, 0, 0),
                ymd_hms(1998, 4, 10, 1, 0, 0),
                ymd_hms(1998, 4, 10, 2, 0, 0),
                ymd_hms(1998, 4, 10, 3, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_weekno() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![20],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 5, 11, 0, 0, 0),
                ymd_hms(1998, 5, 11, 1, 0, 0),
                ymd_hms(1998, 5, 11, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_weekno_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 29, 0, 0, 0),
                ymd_hms(1997, 12, 29, 1, 0, 0),
                ymd_hms(1997, 12, 29, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_weekno_and_weekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![52],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 0, 0, 0),
                ymd_hms(1997, 12, 28, 1, 0, 0),
                ymd_hms(1997, 12, 28, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_weekno_and_weekday_last() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![-1],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 0, 0, 0),
                ymd_hms(1997, 12, 28, 1, 0, 0),
                ymd_hms(1997, 12, 28, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_weekno_and_weekday53() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![53],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 12, 28, 0, 0, 0),
                ymd_hms(1998, 12, 28, 1, 0, 0),
                ymd_hms(1998, 12, 28, 2, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_hour() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 0),
                ymd_hms(1997, 9, 3, 6, 0, 0),
                ymd_hms(1997, 9, 3, 18, 0, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 0),
                ymd_hms(1997, 9, 2, 9, 18, 0),
                ymd_hms(1997, 9, 2, 10, 6, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 6),
                ymd_hms(1997, 9, 2, 9, 0, 18),
                ymd_hms(1997, 9, 2, 10, 0, 6),
            ],
        );
    }

    #[test]
    fn hourly_by_hour_and_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 0),
                ymd_hms(1997, 9, 2, 18, 18, 0),
                ymd_hms(1997, 9, 3, 6, 6, 0),
            ],
        );
    }

    #[test]
    fn hourly_by_hour_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 6),
                ymd_hms(1997, 9, 2, 18, 0, 18),
                ymd_hms(1997, 9, 3, 6, 0, 6),
            ],
        );
    }

    #[test]
    fn hourly_by_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 6),
                ymd_hms(1997, 9, 2, 9, 6, 18),
                ymd_hms(1997, 9, 2, 9, 18, 6),
            ],
        );
    }

    #[test]
    fn hourly_by_hour_and_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(5),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 6),
                ymd_hms(1997, 9, 2, 18, 6, 18),
                ymd_hms(1997, 9, 2, 18, 18, 6),
                ymd_hms(1997, 9, 2, 18, 18, 18),
                ymd_hms(1997, 9, 3, 6, 6, 6),
            ],
        );
    }

    #[test]
    fn hourly_by_setpos() {
        let options = ParsedOptions {
            freq: Frequenzy::Hourly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![3, -3],
            byweekno: vec![],
            byminute: vec![15, 45],
            bysecond: vec![15, 45],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 15, 45),
                ymd_hms(1997, 9, 2, 9, 45, 15),
                ymd_hms(1997, 9, 2, 10, 15, 45),
            ],
        );
    }

    #[test]
    fn minutely() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 2, 9, 1, 0),
                ymd_hms(1997, 9, 2, 9, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_interval() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 2, 9, 2, 0),
                ymd_hms(1997, 9, 2, 9, 4, 0),
            ],
        );
    }

    #[test]
    fn minutely_interval_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1501,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 3, 10, 1, 0),
                ymd_hms(1997, 9, 4, 11, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_month() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 0, 1, 0),
                ymd_hms(1998, 1, 1, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 3, 0, 0, 0),
                ymd_hms(1997, 9, 3, 0, 1, 0),
                ymd_hms(1997, 9, 3, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_month_and_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![5, 7],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 5, 0, 0, 0),
                ymd_hms(1998, 1, 5, 0, 1, 0),
                ymd_hms(1998, 1, 5, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![3, 5],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 4, 0, 0, 0),
                ymd_hms(1997, 9, 4, 0, 1, 0),
                ymd_hms(1997, 9, 4, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_month_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 0, 1, 0),
                ymd_hms(1998, 1, 1, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 0, 1, 0),
                ymd_hms(1998, 1, 1, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_month_and_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 0, 1, 0),
                ymd_hms(1998, 1, 1, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 0, 0, 0),
                ymd_hms(1997, 12, 31, 0, 1, 0),
                ymd_hms(1997, 12, 31, 0, 2, 0),
                ymd_hms(1997, 12, 31, 0, 3, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_yeardayneg() {
        let start  = std::time::SystemTime::now();
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![-365, -266, -166, -1],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 0, 0, 0),
                ymd_hms(1997, 12, 31, 0, 1, 0),
                ymd_hms(1997, 12, 31, 0, 2, 0),
                ymd_hms(1997, 12, 31, 0, 3, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_month_and_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(4),
            bymonth: vec![4, 7],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 10, 0, 0, 0),
                ymd_hms(1998, 4, 10, 0, 1, 0),
                ymd_hms(1998, 4, 10, 0, 2, 0),
                ymd_hms(1998, 4, 10, 0, 3, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_weekno() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![20],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 5, 11, 0, 0, 0),
                ymd_hms(1998, 5, 11, 0, 1, 0),
                ymd_hms(1998, 5, 11, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_weekno_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![1],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 29, 0, 0, 0),
                ymd_hms(1997, 12, 29, 0, 1, 0),
                ymd_hms(1997, 12, 29, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_weekno_and_weekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![52],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 0, 0, 0),
                ymd_hms(1997, 12, 28, 0, 1, 0),
                ymd_hms(1997, 12, 28, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_weekno_and_weekday_last() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![-1],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 0, 0, 0),
                ymd_hms(1997, 12, 28, 0, 1, 0),
                ymd_hms(1997, 12, 28, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_weekno_and_weekday53() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![53],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 12, 28, 0, 0, 0),
                ymd_hms(1998, 12, 28, 0, 1, 0),
                ymd_hms(1998, 12, 28, 0, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_hour() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 0),
                ymd_hms(1997, 9, 2, 18, 1, 0),
                ymd_hms(1997, 9, 2, 18, 2, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 0),
                ymd_hms(1997, 9, 2, 9, 18, 0),
                ymd_hms(1997, 9, 2, 10, 6, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 6),
                ymd_hms(1997, 9, 2, 9, 0, 18),
                ymd_hms(1997, 9, 2, 9, 1, 6),
            ],
        );
    }

    #[test]
    fn minutely_by_hour_and_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 0),
                ymd_hms(1997, 9, 2, 18, 18, 0),
                ymd_hms(1997, 9, 3, 6, 6, 0),
            ],
        );
    }

    #[test]
    fn minutely_by_hour_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 6),
                ymd_hms(1997, 9, 2, 18, 0, 18),
                ymd_hms(1997, 9, 2, 18, 1, 6),
            ],
        );
    }

    #[test]
    fn minutely_by_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 6),
                ymd_hms(1997, 9, 2, 9, 6, 18),
                ymd_hms(1997, 9, 2, 9, 18, 6),
            ],
        );
    }

    #[test]
    fn minutely_by_hour_and_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(5),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 6),
                ymd_hms(1997, 9, 2, 18, 6, 18),
                ymd_hms(1997, 9, 2, 18, 18, 6),
                ymd_hms(1997, 9, 2, 18, 18, 18),
                ymd_hms(1997, 9, 3, 6, 6, 6),
            ],
        );
    }

    #[test]
    fn minutely_by_setpos() {
        let options = ParsedOptions {
            freq: Frequenzy::Minutely,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![3, -3],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![15, 30, 45],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 15),
                ymd_hms(1997, 9, 2, 9, 0, 45),
                ymd_hms(1997, 9, 2, 9, 1, 15),
            ],
        );
    }

    #[test]
    fn secondly() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 2, 9, 0, 1),
                ymd_hms(1997, 9, 2, 9, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_interval() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 2, 9, 0, 2),
                ymd_hms(1997, 9, 2, 9, 0, 4),
            ],
        );
    }

    #[test]
    fn secondly_interval_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 90061,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 3, 10, 1, 1),
                ymd_hms(1997, 9, 4, 11, 2, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_month() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 0, 0, 1),
                ymd_hms(1998, 1, 1, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 3, 0, 0, 0),
                ymd_hms(1997, 9, 3, 0, 0, 1),
                ymd_hms(1997, 9, 3, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_month_and_monthday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![5, 7],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 5, 0, 0, 0),
                ymd_hms(1998, 1, 5, 0, 0, 1),
                ymd_hms(1998, 1, 5, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![3, 5],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 4, 0, 0, 0),
                ymd_hms(1997, 9, 4, 0, 0, 1),
                ymd_hms(1997, 9, 4, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_month_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 0, 0, 1),
                ymd_hms(1998, 1, 1, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 0, 0, 1),
                ymd_hms(1998, 1, 1, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_month_and_monthday_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![1, 3],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![1, 3],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![1, 3],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 1, 1, 0, 0, 0),
                ymd_hms(1998, 1, 1, 0, 0, 1),
                ymd_hms(1998, 1, 1, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 0, 0, 0),
                ymd_hms(1997, 12, 31, 0, 0, 1),
                ymd_hms(1997, 12, 31, 0, 0, 2),
                ymd_hms(1997, 12, 31, 0, 0, 3),
            ],
        );
    }

    #[test]
    fn secondly_by_yeardayneg() {
        let start  = std::time::SystemTime::now();
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![-365, -266, -166, -1],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 31, 0, 0, 0),
                ymd_hms(1997, 12, 31, 0, 0, 1),
                ymd_hms(1997, 12, 31, 0, 0, 2),
                ymd_hms(1997, 12, 31, 0, 0, 3),
            ],
        );
    }

    #[test]
    fn secondly_by_month_and_yearday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(4),
            bymonth: vec![4, 7],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![1, 100, 200, 365],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 4, 10, 0, 0, 0),
                ymd_hms(1998, 4, 10, 0, 0, 1),
                ymd_hms(1998, 4, 10, 0, 0, 2),
                ymd_hms(1998, 4, 10, 0, 0, 3),
            ],
        );
    }

    #[test]
    fn secondly_by_weekno() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![20],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 5, 11, 0, 0, 0),
                ymd_hms(1998, 5, 11, 0, 0, 1),
                ymd_hms(1998, 5, 11, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_weekno_and_weekday() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![1],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 29, 0, 0, 0),
                ymd_hms(1997, 12, 29, 0, 0, 1),
                ymd_hms(1997, 12, 29, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_weekno_and_weekday_large() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![52],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 0, 0, 0),
                ymd_hms(1997, 12, 28, 0, 0, 1),
                ymd_hms(1997, 12, 28, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_weekno_and_weekday_last() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![6],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![-1],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 12, 28, 0, 0, 0),
                ymd_hms(1997, 12, 28, 0, 0, 1),
                ymd_hms(1997, 12, 28, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_weekno_and_weekday53() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![0],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![53],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1998, 12, 28, 0, 0, 0),
                ymd_hms(1998, 12, 28, 0, 0, 1),
                ymd_hms(1998, 12, 28, 0, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_hour() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 0),
                ymd_hms(1997, 9, 2, 18, 0, 1),
                ymd_hms(1997, 9, 2, 18, 0, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 0),
                ymd_hms(1997, 9, 2, 9, 6, 1),
                ymd_hms(1997, 9, 2, 9, 6, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 6),
                ymd_hms(1997, 9, 2, 9, 0, 18),
                ymd_hms(1997, 9, 2, 9, 1, 6),
            ],
        );
    }

    #[test]
    fn secondly_by_hour_and_minute() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 0),
                ymd_hms(1997, 9, 2, 18, 6, 1),
                ymd_hms(1997, 9, 2, 18, 6, 2),
            ],
        );
    }

    #[test]
    fn secondly_by_hour_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 0, 6),
                ymd_hms(1997, 9, 2, 18, 0, 18),
                ymd_hms(1997, 9, 2, 18, 1, 6),
            ],
        );
    }

    #[test]
    fn secondly_by_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 6, 6),
                ymd_hms(1997, 9, 2, 9, 6, 18),
                ymd_hms(1997, 9, 2, 9, 18, 6),
            ],
        );
    }

    #[test]
    fn secondly_by_hour_and_minute_and_second() {
        let options = ParsedOptions {
            freq: Frequenzy::Secondly,
            count: Some(5),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            byweekday: vec![],
            byhour: vec![6, 18],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![6, 18],
            bysecond: vec![6, 18],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            until: None,
            wkst: 0,
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 18, 6, 6),
                ymd_hms(1997, 9, 2, 18, 6, 18),
                ymd_hms(1997, 9, 2, 18, 18, 6),
                ymd_hms(1997, 9, 2, 18, 18, 18),
                ymd_hms(1997, 9, 3, 6, 6, 6),
            ],
        );
    }

    #[test]
    fn until_not_matching() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            until: Some(ymd_hms(1997, 9, 5, 8, 0, 0)),
            wkst: 0,
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 3, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn until_matching() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            until: Some(ymd_hms(1997, 9, 4, 9, 0, 0)),
            wkst: 0,
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 3, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn until_single() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(1),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            until: Some(ymd_hms(1997, 9, 2, 9, 0, 0)),
            wkst: 0,
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(options, &vec![ymd_hms(1997, 9, 2, 9, 0, 0)]);
    }

    #[test]
    fn until_empty() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(1),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            until: Some(ymd_hms(1997, 9, 1, 9, 0, 0)),
            wkst: 0,
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(options, &vec![]);
    }

    #[test]
    fn until_with_date() {
        let options = ParsedOptions {
            freq: Frequenzy::Daily,
            count: Some(4),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            until: Some(ymd_hms(1997, 9, 5, 0, 0, 0)),
            wkst: 0,
            byweekday: vec![],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            tzid: UTC,
            interval: 1,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 3, 9, 0, 0),
                ymd_hms(1997, 9, 4, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn wkst_interval_mo() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            until: None,
            wkst: 0,
            byweekday: vec![1, 6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 7, 9, 0, 0),
                ymd_hms(1997, 9, 16, 9, 0, 0),
            ],
        );
    }

    #[test]
    fn wkst_interval_su() {
        let options = ParsedOptions {
            freq: Frequenzy::Weekly,
            count: Some(3),
            bymonth: vec![],
            dtstart: ymd_hms(1997, 9, 2, 9, 0, 0),
            until: None,
            wkst: 6,
            byweekday: vec![1, 6],
            byhour: vec![9],
            bysetpos: vec![],
            byweekno: vec![],
            byminute: vec![0],
            bysecond: vec![0],
            byyearday: vec![],
            bymonthday: vec![],
            bynweekday: vec![],
            bynmonthday: vec![],
            tzid: UTC,
            interval: 2,
            byeaster: None,
        };
        test_recurring(
            options,
            &vec![
                ymd_hms(1997, 9, 2, 9, 0, 0),
                ymd_hms(1997, 9, 14, 9, 0, 0),
                ymd_hms(1997, 9, 16, 9, 0, 0),
            ],
        );
    }
}