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Tweak implementation of Arbitrary for NaiveDate and NaiveTime to make it infallible

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This commit is contained in:
Sergey Potapov 2022-10-17 12:36:23 +02:00 committed by Dirkjan Ochtman
parent 2eda0f1a61
commit c879b18dbf
2 changed files with 7 additions and 4 deletions
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3
src/naive/date.rs
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@ -197,7 +197,8 @@ pub const MAX_DATE: NaiveDate = NaiveDate::MAX;
impl arbitrary::Arbitrary<'_> for NaiveDate {
fn arbitrary(u: &mut arbitrary::Unstructured) -> arbitrary::Result<NaiveDate> {
let year = u.int_in_range(MIN_YEAR..=MAX_YEAR)?;
let ord = u.int_in_range(1..=366)?;
let max_days = YearFlags::from_year(year).ndays();
let ord = u.int_in_range(1..=max_days)?;
NaiveDate::from_yo_opt(year, ord).ok_or(arbitrary::Error::IncorrectFormat)
}
}

8
src/naive/time/mod.rs
View File

@ -197,9 +197,11 @@ pub struct NaiveTime {
#[cfg(feature = "arbitrary")]
impl arbitrary::Arbitrary<'_> for NaiveTime {
fn arbitrary(u: &mut arbitrary::Unstructured) -> arbitrary::Result<NaiveTime> {
let secs = u.int_in_range(0..=86_400)?;
let frac = u.int_in_range(0..=2_000_000_000)?;
Ok(NaiveTime { secs, frac })
let secs = u.int_in_range(0..=86_399)?;
let nano = u.int_in_range(0..=1_999_999_999)?;
let time = NaiveTime::from_num_seconds_from_midnight_opt(secs, nano)
.expect("Could not generate a valid chrono::NaiveTime. It looks like implementation of Arbitrary for NaiveTime is erroneous.");
Ok(time)
}
}