#[cfg(test)]
mod tests {
    use chrono::{DateTime, FixedOffset, NaiveDate, TimeZone};
    use chrono_tz::{
        America::{New_York, Phoenix},
        Tz,
        US::Mountain,
    };

    #[test]
    fn it_saves_with_offset() {
        let date = Phoenix.with_ymd_and_hms(2023, 10, 13, 23, 0, 0).unwrap();
        assert_eq!(date.to_rfc3339(), "2023-10-13T23:00:00-07:00");
        assert_eq!(date.date_naive().to_string(), "2023-10-13");
        assert_eq!(
            date.with_timezone(&New_York).to_rfc3339(),
            "2023-10-14T02:00:00-04:00"
        );
        assert_eq!(
            date.with_timezone(&New_York).date_naive().to_string(),
            "2023-10-14"
        );
    }

    #[test]
    fn it_can_parse_with_offset() {
        let reference = "2023-10-13T23:00:00-08:00";
        let date = DateTime::parse_from_rfc3339(reference).unwrap();
        assert_eq!(
            date,
            FixedOffset::west_opt(8 * 60 * 60)
                .unwrap()
                .with_ymd_and_hms(2023, 10, 13, 23, 0, 0)
                .unwrap()
        );
        assert_eq!(
            date.with_timezone(&New_York),
            FixedOffset::west_opt(4 * 60 * 60)
                .unwrap()
                .with_ymd_and_hms(2023, 10, 14, 03, 0, 0)
                .unwrap()
        );
        assert_eq!(
            date.date_naive(),
            NaiveDate::from_ymd_opt(2023, 10, 13).unwrap()
        );
        assert_eq!(
            date.with_timezone(&New_York).date_naive(),
            NaiveDate::from_ymd_opt(2023, 10, 14).unwrap()
        );
    }
}