use chrono::naive::NaiveDateTime;
use failure::Fallible as Result;
use failure::err_msg;
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct DateTimeRange(NaiveDateTime, NaiveDateTime);
impl DateTimeRange {
pub fn new(start: NaiveDateTime, end: NaiveDateTime) -> Result<DateTimeRange> {
if start < end {
Ok(DateTimeRange(start, end))
} else {
Err(err_msg("End date before start date"))
}
}
}
#[cfg(test)]
mod tests {
use chrono::naive::NaiveDateTime;
use chrono::naive::NaiveDate;
use chrono::naive::NaiveTime;
use super::DateTimeRange;
#[test]
fn test_new_returns_error_if_start_after_end_date() {
#[allow(clippy::zero_prefixed_literal)]
let start = NaiveDateTime::new(
NaiveDate::from_ymd(2000, 02, 02),
NaiveTime::from_hms(12, 00, 02)
);
#[allow(clippy::zero_prefixed_literal)]
let end = NaiveDateTime::new(
NaiveDate::from_ymd(2000, 02, 02),
NaiveTime::from_hms(12, 00, 01)
);
let res = DateTimeRange::new(start, end);
assert!(res.is_err());
}
#[test]
fn test_new_returns_ok_if_start_is_before_end() {
#[allow(clippy::zero_prefixed_literal)]
let start = NaiveDateTime::new(
NaiveDate::from_ymd(2000, 02, 02),
NaiveTime::from_hms(12, 00, 01)
);
#[allow(clippy::zero_prefixed_literal)]
let end = NaiveDateTime::new(
NaiveDate::from_ymd(2000, 02, 02),
NaiveTime::from_hms(12, 00, 02)
);
let res = DateTimeRange::new(start, end);
assert!(res.is_ok());
}
}