rjango 0.1.1

A full-stack Rust backend framework inspired by Django
Documentation 
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use chrono::{NaiveDate, NaiveDateTime, NaiveTime};

/// Default date format.
pub const DATE_FORMAT: &str = "%b. %-d, %Y";
/// Default time format.
pub const TIME_FORMAT: &str = "%H:%M";
/// Default datetime format.
pub const DATETIME_FORMAT: &str = "%b. %-d, %Y, %-I:%M %p";

#[must_use]
pub fn date_format(date: &NaiveDate) -> String {
    date.format(DATE_FORMAT).to_string()
}

#[must_use]
pub fn time_format(time: &NaiveTime) -> String {
    time.format(TIME_FORMAT).to_string()
}

#[must_use]
pub fn datetime_format(dt: &NaiveDateTime) -> String {
    dt.format(DATETIME_FORMAT).to_string()
}

#[cfg(test)]
mod tests {
    use super::{
        DATE_FORMAT, DATETIME_FORMAT, TIME_FORMAT, date_format, datetime_format, time_format,
    };
    use chrono::{NaiveDate, NaiveTime};

    #[test]
    fn date_format_uses_expected_default_pattern() {
        let date = NaiveDate::from_ymd_opt(2024, 10, 7).unwrap();

        assert_eq!(DATE_FORMAT, "%b. %-d, %Y");
        assert_eq!(date_format(&date), "Oct. 7, 2024");
    }

    #[test]
    fn time_format_uses_24_hour_clock() {
        let time = NaiveTime::from_hms_opt(14, 30, 0).unwrap();

        assert_eq!(TIME_FORMAT, "%H:%M");
        assert_eq!(time_format(&time), "14:30");
    }

    #[test]
    fn datetime_format_combines_date_and_time() {
        let dt = NaiveDate::from_ymd_opt(2024, 10, 7)
            .unwrap()
            .and_hms_opt(14, 30, 0)
            .unwrap();

        assert_eq!(DATETIME_FORMAT, "%b. %-d, %Y, %-I:%M %p");
        assert_eq!(datetime_format(&dt), "Oct. 7, 2024, 2:30 PM");
    }
}