use super::{Days, Months, NaiveDate, MAX_YEAR, MIN_YEAR}; use crate::naive::internals::{YearFlags, A, AG, B, BA, C, CB, D, DC, E, ED, F, FE, G, GF}; use crate::{Datelike, TimeDelta, Weekday}; // as it is hard to verify year flags in `NaiveDate::MIN` and `NaiveDate::MAX`, // we use a separate run-time test. #[test] fn test_date_bounds() { let calculated_min = NaiveDate::from_ymd_opt(MIN_YEAR, 1, 1).unwrap(); let calculated_max = NaiveDate::from_ymd_opt(MAX_YEAR, 12, 31).unwrap(); assert!( NaiveDate::MIN == calculated_min, "`NaiveDate::MIN` should have year flag {:?}", calculated_min.year_flags() ); assert!( NaiveDate::MAX == calculated_max, "`NaiveDate::MAX` should have year flag {:?} and ordinal {}", calculated_max.year_flags(), calculated_max.ordinal() ); // let's also check that the entire range do not exceed 2^44 seconds // (sometimes used for bounding `TimeDelta` against overflow) let maxsecs = NaiveDate::MAX.signed_duration_since(NaiveDate::MIN).num_seconds(); let maxsecs = maxsecs + 86401; // also take care of DateTime assert!( maxsecs < (1 << MAX_BITS), "The entire `NaiveDate` range somehow exceeds 2^{} seconds", MAX_BITS ); const BEFORE_MIN: NaiveDate = NaiveDate::BEFORE_MIN; assert_eq!(BEFORE_MIN.year_flags(), YearFlags::from_year(BEFORE_MIN.year())); assert_eq!((BEFORE_MIN.month(), BEFORE_MIN.day()), (12, 31)); const AFTER_MAX: NaiveDate = NaiveDate::AFTER_MAX; assert_eq!(AFTER_MAX.year_flags(), YearFlags::from_year(AFTER_MAX.year())); assert_eq!((AFTER_MAX.month(), AFTER_MAX.day()), (1, 1)); } #[test] fn diff_months() { // identity assert_eq!( NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_add_months(Months::new(0)), Some(NaiveDate::from_ymd_opt(2022, 8, 3).unwrap()) ); // add with months exceeding `i32::MAX` assert_eq!( NaiveDate::from_ymd_opt(2022, 8, 3) .unwrap() .checked_add_months(Months::new(i32::MAX as u32 + 1)), None ); // sub with months exceeding `i32::MIN` assert_eq!( NaiveDate::from_ymd_opt(2022, 8, 3) .unwrap() .checked_sub_months(Months::new(i32::MIN.unsigned_abs() + 1)), None ); // add overflowing year assert_eq!(NaiveDate::MAX.checked_add_months(Months::new(1)), None); // add underflowing year assert_eq!(NaiveDate::MIN.checked_sub_months(Months::new(1)), None); // sub crossing year 0 boundary assert_eq!( NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_sub_months(Months::new(2050 * 12)), Some(NaiveDate::from_ymd_opt(-28, 8, 3).unwrap()) ); // add crossing year boundary assert_eq!( NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_add_months(Months::new(6)), Some(NaiveDate::from_ymd_opt(2023, 2, 3).unwrap()) ); // sub crossing year boundary assert_eq!( NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_sub_months(Months::new(10)), Some(NaiveDate::from_ymd_opt(2021, 10, 3).unwrap()) ); // add clamping day, non-leap year assert_eq!( NaiveDate::from_ymd_opt(2022, 1, 29).unwrap().checked_add_months(Months::new(1)), Some(NaiveDate::from_ymd_opt(2022, 2, 28).unwrap()) ); // add to leap day assert_eq!( NaiveDate::from_ymd_opt(2022, 10, 29).unwrap().checked_add_months(Months::new(16)), Some(NaiveDate::from_ymd_opt(2024, 2, 29).unwrap()) ); // add into december assert_eq!( NaiveDate::from_ymd_opt(2022, 10, 31).unwrap().checked_add_months(Months::new(2)), Some(NaiveDate::from_ymd_opt(2022, 12, 31).unwrap()) ); // sub into december assert_eq!( NaiveDate::from_ymd_opt(2022, 10, 31).unwrap().checked_sub_months(Months::new(10)), Some(NaiveDate::from_ymd_opt(2021, 12, 31).unwrap()) ); // add into january assert_eq!( NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_add_months(Months::new(5)), Some(NaiveDate::from_ymd_opt(2023, 1, 3).unwrap()) ); // sub into january assert_eq!( NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_sub_months(Months::new(7)), Some(NaiveDate::from_ymd_opt(2022, 1, 3).unwrap()) ); } #[test] fn test_readme_doomsday() { for y in NaiveDate::MIN.year()..=NaiveDate::MAX.year() { // even months let d4 = NaiveDate::from_ymd_opt(y, 4, 4).unwrap(); let d6 = NaiveDate::from_ymd_opt(y, 6, 6).unwrap(); let d8 = NaiveDate::from_ymd_opt(y, 8, 8).unwrap(); let d10 = NaiveDate::from_ymd_opt(y, 10, 10).unwrap(); let d12 = NaiveDate::from_ymd_opt(y, 12, 12).unwrap(); // nine to five, seven-eleven let d59 = NaiveDate::from_ymd_opt(y, 5, 9).unwrap(); let d95 = NaiveDate::from_ymd_opt(y, 9, 5).unwrap(); let d711 = NaiveDate::from_ymd_opt(y, 7, 11).unwrap(); let d117 = NaiveDate::from_ymd_opt(y, 11, 7).unwrap(); // "March 0" let d30 = NaiveDate::from_ymd_opt(y, 3, 1).unwrap().pred_opt().unwrap(); let weekday = d30.weekday(); let other_dates = [d4, d6, d8, d10, d12, d59, d95, d711, d117]; assert!(other_dates.iter().all(|d| d.weekday() == weekday)); } } #[test] fn test_date_from_ymd() { let from_ymd = NaiveDate::from_ymd_opt; assert!(from_ymd(2012, 0, 1).is_none()); assert!(from_ymd(2012, 1, 1).is_some()); assert!(from_ymd(2012, 2, 29).is_some()); assert!(from_ymd(2014, 2, 29).is_none()); assert!(from_ymd(2014, 3, 0).is_none()); assert!(from_ymd(2014, 3, 1).is_some()); assert!(from_ymd(2014, 3, 31).is_some()); assert!(from_ymd(2014, 3, 32).is_none()); assert!(from_ymd(2014, 12, 31).is_some()); assert!(from_ymd(2014, 13, 1).is_none()); } #[test] fn test_date_from_yo() { let from_yo = NaiveDate::from_yo_opt; let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); assert_eq!(from_yo(2012, 0), None); assert_eq!(from_yo(2012, 1), Some(ymd(2012, 1, 1))); assert_eq!(from_yo(2012, 2), Some(ymd(2012, 1, 2))); assert_eq!(from_yo(2012, 32), Some(ymd(2012, 2, 1))); assert_eq!(from_yo(2012, 60), Some(ymd(2012, 2, 29))); assert_eq!(from_yo(2012, 61), Some(ymd(2012, 3, 1))); assert_eq!(from_yo(2012, 100), Some(ymd(2012, 4, 9))); assert_eq!(from_yo(2012, 200), Some(ymd(2012, 7, 18))); assert_eq!(from_yo(2012, 300), Some(ymd(2012, 10, 26))); assert_eq!(from_yo(2012, 366), Some(ymd(2012, 12, 31))); assert_eq!(from_yo(2012, 367), None); assert_eq!(from_yo(2012, 1 << 28 | 60), None); assert_eq!(from_yo(2014, 0), None); assert_eq!(from_yo(2014, 1), Some(ymd(2014, 1, 1))); assert_eq!(from_yo(2014, 2), Some(ymd(2014, 1, 2))); assert_eq!(from_yo(2014, 32), Some(ymd(2014, 2, 1))); assert_eq!(from_yo(2014, 59), Some(ymd(2014, 2, 28))); assert_eq!(from_yo(2014, 60), Some(ymd(2014, 3, 1))); assert_eq!(from_yo(2014, 100), Some(ymd(2014, 4, 10))); assert_eq!(from_yo(2014, 200), Some(ymd(2014, 7, 19))); assert_eq!(from_yo(2014, 300), Some(ymd(2014, 10, 27))); assert_eq!(from_yo(2014, 365), Some(ymd(2014, 12, 31))); assert_eq!(from_yo(2014, 366), None); } #[test] fn test_date_from_isoywd() { let from_isoywd = NaiveDate::from_isoywd_opt; let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); assert_eq!(from_isoywd(2004, 0, Weekday::Sun), None); assert_eq!(from_isoywd(2004, 1, Weekday::Mon), Some(ymd(2003, 12, 29))); assert_eq!(from_isoywd(2004, 1, Weekday::Sun), Some(ymd(2004, 1, 4))); assert_eq!(from_isoywd(2004, 2, Weekday::Mon), Some(ymd(2004, 1, 5))); assert_eq!(from_isoywd(2004, 2, Weekday::Sun), Some(ymd(2004, 1, 11))); assert_eq!(from_isoywd(2004, 52, Weekday::Mon), Some(ymd(2004, 12, 20))); assert_eq!(from_isoywd(2004, 52, Weekday::Sun), Some(ymd(2004, 12, 26))); assert_eq!(from_isoywd(2004, 53, Weekday::Mon), Some(ymd(2004, 12, 27))); assert_eq!(from_isoywd(2004, 53, Weekday::Sun), Some(ymd(2005, 1, 2))); assert_eq!(from_isoywd(2004, 54, Weekday::Mon), None); assert_eq!(from_isoywd(2011, 0, Weekday::Sun), None); assert_eq!(from_isoywd(2011, 1, Weekday::Mon), Some(ymd(2011, 1, 3))); assert_eq!(from_isoywd(2011, 1, Weekday::Sun), Some(ymd(2011, 1, 9))); assert_eq!(from_isoywd(2011, 2, Weekday::Mon), Some(ymd(2011, 1, 10))); assert_eq!(from_isoywd(2011, 2, Weekday::Sun), Some(ymd(2011, 1, 16))); assert_eq!(from_isoywd(2018, 51, Weekday::Mon), Some(ymd(2018, 12, 17))); assert_eq!(from_isoywd(2018, 51, Weekday::Sun), Some(ymd(2018, 12, 23))); assert_eq!(from_isoywd(2018, 52, Weekday::Mon), Some(ymd(2018, 12, 24))); assert_eq!(from_isoywd(2018, 52, Weekday::Sun), Some(ymd(2018, 12, 30))); assert_eq!(from_isoywd(2018, 53, Weekday::Mon), None); } #[test] fn test_date_from_isoywd_and_iso_week() { for year in 2000..2401 { for week in 1..54 { for &weekday in [ Weekday::Mon, Weekday::Tue, Weekday::Wed, Weekday::Thu, Weekday::Fri, Weekday::Sat, Weekday::Sun, ] .iter() { let d = NaiveDate::from_isoywd_opt(year, week, weekday); if let Some(d) = d { assert_eq!(d.weekday(), weekday); let w = d.iso_week(); assert_eq!(w.year(), year); assert_eq!(w.week(), week); } } } } for year in 2000..2401 { for month in 1..13 { for day in 1..32 { let d = NaiveDate::from_ymd_opt(year, month, day); if let Some(d) = d { let w = d.iso_week(); let d_ = NaiveDate::from_isoywd_opt(w.year(), w.week(), d.weekday()); assert_eq!(d, d_.unwrap()); } } } } } #[test] fn test_date_from_num_days_from_ce() { let from_ndays_from_ce = NaiveDate::from_num_days_from_ce_opt; assert_eq!(from_ndays_from_ce(1), Some(NaiveDate::from_ymd_opt(1, 1, 1).unwrap())); assert_eq!(from_ndays_from_ce(2), Some(NaiveDate::from_ymd_opt(1, 1, 2).unwrap())); assert_eq!(from_ndays_from_ce(31), Some(NaiveDate::from_ymd_opt(1, 1, 31).unwrap())); assert_eq!(from_ndays_from_ce(32), Some(NaiveDate::from_ymd_opt(1, 2, 1).unwrap())); assert_eq!(from_ndays_from_ce(59), Some(NaiveDate::from_ymd_opt(1, 2, 28).unwrap())); assert_eq!(from_ndays_from_ce(60), Some(NaiveDate::from_ymd_opt(1, 3, 1).unwrap())); assert_eq!(from_ndays_from_ce(365), Some(NaiveDate::from_ymd_opt(1, 12, 31).unwrap())); assert_eq!(from_ndays_from_ce(365 + 1), Some(NaiveDate::from_ymd_opt(2, 1, 1).unwrap())); assert_eq!(from_ndays_from_ce(365 * 2 + 1), Some(NaiveDate::from_ymd_opt(3, 1, 1).unwrap())); assert_eq!(from_ndays_from_ce(365 * 3 + 1), Some(NaiveDate::from_ymd_opt(4, 1, 1).unwrap())); assert_eq!(from_ndays_from_ce(365 * 4 + 2), Some(NaiveDate::from_ymd_opt(5, 1, 1).unwrap())); assert_eq!(from_ndays_from_ce(146097 + 1), Some(NaiveDate::from_ymd_opt(401, 1, 1).unwrap())); assert_eq!( from_ndays_from_ce(146097 * 5 + 1), Some(NaiveDate::from_ymd_opt(2001, 1, 1).unwrap()) ); assert_eq!(from_ndays_from_ce(719163), Some(NaiveDate::from_ymd_opt(1970, 1, 1).unwrap())); assert_eq!(from_ndays_from_ce(0), Some(NaiveDate::from_ymd_opt(0, 12, 31).unwrap())); // 1 BCE assert_eq!(from_ndays_from_ce(-365), Some(NaiveDate::from_ymd_opt(0, 1, 1).unwrap())); assert_eq!(from_ndays_from_ce(-366), Some(NaiveDate::from_ymd_opt(-1, 12, 31).unwrap())); // 2 BCE for days in (-9999..10001).map(|x| x * 100) { assert_eq!(from_ndays_from_ce(days).map(|d| d.num_days_from_ce()), Some(days)); } assert_eq!(from_ndays_from_ce(NaiveDate::MIN.num_days_from_ce()), Some(NaiveDate::MIN)); assert_eq!(from_ndays_from_ce(NaiveDate::MIN.num_days_from_ce() - 1), None); assert_eq!(from_ndays_from_ce(NaiveDate::MAX.num_days_from_ce()), Some(NaiveDate::MAX)); assert_eq!(from_ndays_from_ce(NaiveDate::MAX.num_days_from_ce() + 1), None); assert_eq!(from_ndays_from_ce(i32::MIN), None); assert_eq!(from_ndays_from_ce(i32::MAX), None); } #[test] fn test_date_from_weekday_of_month_opt() { let ymwd = NaiveDate::from_weekday_of_month_opt; assert_eq!(ymwd(2018, 8, Weekday::Tue, 0), None); assert_eq!(ymwd(2018, 8, Weekday::Wed, 1), Some(NaiveDate::from_ymd_opt(2018, 8, 1).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Thu, 1), Some(NaiveDate::from_ymd_opt(2018, 8, 2).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Sun, 1), Some(NaiveDate::from_ymd_opt(2018, 8, 5).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Mon, 1), Some(NaiveDate::from_ymd_opt(2018, 8, 6).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Tue, 1), Some(NaiveDate::from_ymd_opt(2018, 8, 7).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Wed, 2), Some(NaiveDate::from_ymd_opt(2018, 8, 8).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Sun, 2), Some(NaiveDate::from_ymd_opt(2018, 8, 12).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Thu, 3), Some(NaiveDate::from_ymd_opt(2018, 8, 16).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Thu, 4), Some(NaiveDate::from_ymd_opt(2018, 8, 23).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Thu, 5), Some(NaiveDate::from_ymd_opt(2018, 8, 30).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Fri, 5), Some(NaiveDate::from_ymd_opt(2018, 8, 31).unwrap())); assert_eq!(ymwd(2018, 8, Weekday::Sat, 5), None); } #[test] fn test_date_fields() { fn check(year: i32, month: u32, day: u32, ordinal: u32) { let d1 = NaiveDate::from_ymd_opt(year, month, day).unwrap(); assert_eq!(d1.year(), year); assert_eq!(d1.month(), month); assert_eq!(d1.day(), day); assert_eq!(d1.ordinal(), ordinal); let d2 = NaiveDate::from_yo_opt(year, ordinal).unwrap(); assert_eq!(d2.year(), year); assert_eq!(d2.month(), month); assert_eq!(d2.day(), day); assert_eq!(d2.ordinal(), ordinal); assert_eq!(d1, d2); } check(2012, 1, 1, 1); check(2012, 1, 2, 2); check(2012, 2, 1, 32); check(2012, 2, 29, 60); check(2012, 3, 1, 61); check(2012, 4, 9, 100); check(2012, 7, 18, 200); check(2012, 10, 26, 300); check(2012, 12, 31, 366); check(2014, 1, 1, 1); check(2014, 1, 2, 2); check(2014, 2, 1, 32); check(2014, 2, 28, 59); check(2014, 3, 1, 60); check(2014, 4, 10, 100); check(2014, 7, 19, 200); check(2014, 10, 27, 300); check(2014, 12, 31, 365); } #[test] fn test_date_weekday() { assert_eq!(NaiveDate::from_ymd_opt(1582, 10, 15).unwrap().weekday(), Weekday::Fri); // May 20, 1875 = ISO 8601 reference date assert_eq!(NaiveDate::from_ymd_opt(1875, 5, 20).unwrap().weekday(), Weekday::Thu); assert_eq!(NaiveDate::from_ymd_opt(2000, 1, 1).unwrap().weekday(), Weekday::Sat); } #[test] fn test_date_with_fields() { let d = NaiveDate::from_ymd_opt(2000, 2, 29).unwrap(); assert_eq!(d.with_year(-400), Some(NaiveDate::from_ymd_opt(-400, 2, 29).unwrap())); assert_eq!(d.with_year(-100), None); assert_eq!(d.with_year(1600), Some(NaiveDate::from_ymd_opt(1600, 2, 29).unwrap())); assert_eq!(d.with_year(1900), None); assert_eq!(d.with_year(2000), Some(NaiveDate::from_ymd_opt(2000, 2, 29).unwrap())); assert_eq!(d.with_year(2001), None); assert_eq!(d.with_year(2004), Some(NaiveDate::from_ymd_opt(2004, 2, 29).unwrap())); assert_eq!(d.with_year(i32::MAX), None); let d = NaiveDate::from_ymd_opt(2000, 4, 30).unwrap(); assert_eq!(d.with_month(0), None); assert_eq!(d.with_month(1), Some(NaiveDate::from_ymd_opt(2000, 1, 30).unwrap())); assert_eq!(d.with_month(2), None); assert_eq!(d.with_month(3), Some(NaiveDate::from_ymd_opt(2000, 3, 30).unwrap())); assert_eq!(d.with_month(4), Some(NaiveDate::from_ymd_opt(2000, 4, 30).unwrap())); assert_eq!(d.with_month(12), Some(NaiveDate::from_ymd_opt(2000, 12, 30).unwrap())); assert_eq!(d.with_month(13), None); assert_eq!(d.with_month(u32::MAX), None); let d = NaiveDate::from_ymd_opt(2000, 2, 8).unwrap(); assert_eq!(d.with_day(0), None); assert_eq!(d.with_day(1), Some(NaiveDate::from_ymd_opt(2000, 2, 1).unwrap())); assert_eq!(d.with_day(29), Some(NaiveDate::from_ymd_opt(2000, 2, 29).unwrap())); assert_eq!(d.with_day(30), None); assert_eq!(d.with_day(u32::MAX), None); } #[test] fn test_date_with_ordinal() { let d = NaiveDate::from_ymd_opt(2000, 5, 5).unwrap(); assert_eq!(d.with_ordinal(0), None); assert_eq!(d.with_ordinal(1), Some(NaiveDate::from_ymd_opt(2000, 1, 1).unwrap())); assert_eq!(d.with_ordinal(60), Some(NaiveDate::from_ymd_opt(2000, 2, 29).unwrap())); assert_eq!(d.with_ordinal(61), Some(NaiveDate::from_ymd_opt(2000, 3, 1).unwrap())); assert_eq!(d.with_ordinal(366), Some(NaiveDate::from_ymd_opt(2000, 12, 31).unwrap())); assert_eq!(d.with_ordinal(367), None); assert_eq!(d.with_ordinal(1 << 28 | 60), None); let d = NaiveDate::from_ymd_opt(1999, 5, 5).unwrap(); assert_eq!(d.with_ordinal(366), None); assert_eq!(d.with_ordinal(u32::MAX), None); } #[test] fn test_date_num_days_from_ce() { assert_eq!(NaiveDate::from_ymd_opt(1, 1, 1).unwrap().num_days_from_ce(), 1); for year in -9999..10001 { assert_eq!( NaiveDate::from_ymd_opt(year, 1, 1).unwrap().num_days_from_ce(), NaiveDate::from_ymd_opt(year - 1, 12, 31).unwrap().num_days_from_ce() + 1 ); } } #[test] fn test_date_succ() { let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); assert_eq!(ymd(2014, 5, 6).succ_opt(), Some(ymd(2014, 5, 7))); assert_eq!(ymd(2014, 5, 31).succ_opt(), Some(ymd(2014, 6, 1))); assert_eq!(ymd(2014, 12, 31).succ_opt(), Some(ymd(2015, 1, 1))); assert_eq!(ymd(2016, 2, 28).succ_opt(), Some(ymd(2016, 2, 29))); assert_eq!(ymd(NaiveDate::MAX.year(), 12, 31).succ_opt(), None); } #[test] fn test_date_pred() { let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); assert_eq!(ymd(2016, 3, 1).pred_opt(), Some(ymd(2016, 2, 29))); assert_eq!(ymd(2015, 1, 1).pred_opt(), Some(ymd(2014, 12, 31))); assert_eq!(ymd(2014, 6, 1).pred_opt(), Some(ymd(2014, 5, 31))); assert_eq!(ymd(2014, 5, 7).pred_opt(), Some(ymd(2014, 5, 6))); assert_eq!(ymd(NaiveDate::MIN.year(), 1, 1).pred_opt(), None); } #[test] fn test_date_checked_add_signed() { fn check(lhs: Option, delta: TimeDelta, rhs: Option) { assert_eq!(lhs.unwrap().checked_add_signed(delta), rhs); assert_eq!(lhs.unwrap().checked_sub_signed(-delta), rhs); } let ymd = NaiveDate::from_ymd_opt; check(ymd(2014, 1, 1), TimeDelta::zero(), ymd(2014, 1, 1)); check(ymd(2014, 1, 1), TimeDelta::try_seconds(86399).unwrap(), ymd(2014, 1, 1)); // always round towards zero check(ymd(2014, 1, 1), TimeDelta::try_seconds(-86399).unwrap(), ymd(2014, 1, 1)); check(ymd(2014, 1, 1), TimeDelta::try_days(1).unwrap(), ymd(2014, 1, 2)); check(ymd(2014, 1, 1), TimeDelta::try_days(-1).unwrap(), ymd(2013, 12, 31)); check(ymd(2014, 1, 1), TimeDelta::try_days(364).unwrap(), ymd(2014, 12, 31)); check(ymd(2014, 1, 1), TimeDelta::try_days(365 * 4 + 1).unwrap(), ymd(2018, 1, 1)); check(ymd(2014, 1, 1), TimeDelta::try_days(365 * 400 + 97).unwrap(), ymd(2414, 1, 1)); check(ymd(-7, 1, 1), TimeDelta::try_days(365 * 12 + 3).unwrap(), ymd(5, 1, 1)); // overflow check check( ymd(0, 1, 1), TimeDelta::try_days(MAX_DAYS_FROM_YEAR_0 as i64).unwrap(), ymd(MAX_YEAR, 12, 31), ); check(ymd(0, 1, 1), TimeDelta::try_days(MAX_DAYS_FROM_YEAR_0 as i64 + 1).unwrap(), None); check(ymd(0, 1, 1), TimeDelta::MAX, None); check( ymd(0, 1, 1), TimeDelta::try_days(MIN_DAYS_FROM_YEAR_0 as i64).unwrap(), ymd(MIN_YEAR, 1, 1), ); check(ymd(0, 1, 1), TimeDelta::try_days(MIN_DAYS_FROM_YEAR_0 as i64 - 1).unwrap(), None); check(ymd(0, 1, 1), TimeDelta::MIN, None); } #[test] fn test_date_signed_duration_since() { fn check(lhs: Option, rhs: Option, delta: TimeDelta) { assert_eq!(lhs.unwrap().signed_duration_since(rhs.unwrap()), delta); assert_eq!(rhs.unwrap().signed_duration_since(lhs.unwrap()), -delta); } let ymd = NaiveDate::from_ymd_opt; check(ymd(2014, 1, 1), ymd(2014, 1, 1), TimeDelta::zero()); check(ymd(2014, 1, 2), ymd(2014, 1, 1), TimeDelta::try_days(1).unwrap()); check(ymd(2014, 12, 31), ymd(2014, 1, 1), TimeDelta::try_days(364).unwrap()); check(ymd(2015, 1, 3), ymd(2014, 1, 1), TimeDelta::try_days(365 + 2).unwrap()); check(ymd(2018, 1, 1), ymd(2014, 1, 1), TimeDelta::try_days(365 * 4 + 1).unwrap()); check(ymd(2414, 1, 1), ymd(2014, 1, 1), TimeDelta::try_days(365 * 400 + 97).unwrap()); check( ymd(MAX_YEAR, 12, 31), ymd(0, 1, 1), TimeDelta::try_days(MAX_DAYS_FROM_YEAR_0 as i64).unwrap(), ); check( ymd(MIN_YEAR, 1, 1), ymd(0, 1, 1), TimeDelta::try_days(MIN_DAYS_FROM_YEAR_0 as i64).unwrap(), ); } #[test] fn test_date_add_days() { fn check(lhs: Option, days: Days, rhs: Option) { assert_eq!(lhs.unwrap().checked_add_days(days), rhs); } let ymd = NaiveDate::from_ymd_opt; check(ymd(2014, 1, 1), Days::new(0), ymd(2014, 1, 1)); // always round towards zero check(ymd(2014, 1, 1), Days::new(1), ymd(2014, 1, 2)); check(ymd(2014, 1, 1), Days::new(364), ymd(2014, 12, 31)); check(ymd(2014, 1, 1), Days::new(365 * 4 + 1), ymd(2018, 1, 1)); check(ymd(2014, 1, 1), Days::new(365 * 400 + 97), ymd(2414, 1, 1)); check(ymd(-7, 1, 1), Days::new(365 * 12 + 3), ymd(5, 1, 1)); // overflow check check(ymd(0, 1, 1), Days::new(MAX_DAYS_FROM_YEAR_0.try_into().unwrap()), ymd(MAX_YEAR, 12, 31)); check(ymd(0, 1, 1), Days::new(u64::try_from(MAX_DAYS_FROM_YEAR_0).unwrap() + 1), None); } #[test] fn test_date_sub_days() { fn check(lhs: Option, days: Days, rhs: Option) { assert_eq!(lhs.unwrap().checked_sub_days(days), rhs); } let ymd = NaiveDate::from_ymd_opt; check(ymd(2014, 1, 1), Days::new(0), ymd(2014, 1, 1)); check(ymd(2014, 1, 2), Days::new(1), ymd(2014, 1, 1)); check(ymd(2014, 12, 31), Days::new(364), ymd(2014, 1, 1)); check(ymd(2015, 1, 3), Days::new(365 + 2), ymd(2014, 1, 1)); check(ymd(2018, 1, 1), Days::new(365 * 4 + 1), ymd(2014, 1, 1)); check(ymd(2414, 1, 1), Days::new(365 * 400 + 97), ymd(2014, 1, 1)); check(ymd(MAX_YEAR, 12, 31), Days::new(MAX_DAYS_FROM_YEAR_0.try_into().unwrap()), ymd(0, 1, 1)); check( ymd(0, 1, 1), Days::new((-MIN_DAYS_FROM_YEAR_0).try_into().unwrap()), ymd(MIN_YEAR, 1, 1), ); } #[test] fn test_date_addassignment() { let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); let mut date = ymd(2016, 10, 1); date += TimeDelta::try_days(10).unwrap(); assert_eq!(date, ymd(2016, 10, 11)); date += TimeDelta::try_days(30).unwrap(); assert_eq!(date, ymd(2016, 11, 10)); } #[test] fn test_date_subassignment() { let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); let mut date = ymd(2016, 10, 11); date -= TimeDelta::try_days(10).unwrap(); assert_eq!(date, ymd(2016, 10, 1)); date -= TimeDelta::try_days(2).unwrap(); assert_eq!(date, ymd(2016, 9, 29)); } #[test] fn test_date_fmt() { assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(2012, 3, 4).unwrap()), "2012-03-04"); assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(0, 3, 4).unwrap()), "0000-03-04"); assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(-307, 3, 4).unwrap()), "-0307-03-04"); assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(12345, 3, 4).unwrap()), "+12345-03-04"); assert_eq!(NaiveDate::from_ymd_opt(2012, 3, 4).unwrap().to_string(), "2012-03-04"); assert_eq!(NaiveDate::from_ymd_opt(0, 3, 4).unwrap().to_string(), "0000-03-04"); assert_eq!(NaiveDate::from_ymd_opt(-307, 3, 4).unwrap().to_string(), "-0307-03-04"); assert_eq!(NaiveDate::from_ymd_opt(12345, 3, 4).unwrap().to_string(), "+12345-03-04"); // the format specifier should have no effect on `NaiveTime` assert_eq!(format!("{:+30?}", NaiveDate::from_ymd_opt(1234, 5, 6).unwrap()), "1234-05-06"); assert_eq!(format!("{:30?}", NaiveDate::from_ymd_opt(12345, 6, 7).unwrap()), "+12345-06-07"); } #[test] fn test_date_from_str() { // valid cases let valid = [ "-0000000123456-1-2", " -123456 - 1 - 2 ", "-12345-1-2", "-1234-12-31", "-7-6-5", "350-2-28", "360-02-29", "0360-02-29", "2015-2 -18", "2015-02-18", "+70-2-18", "+70000-2-18", "+00007-2-18", ]; for &s in &valid { eprintln!("test_date_from_str valid {:?}", s); let d = match s.parse::() { Ok(d) => d, Err(e) => panic!("parsing `{}` has failed: {}", s, e), }; eprintln!("d {:?} (NaiveDate)", d); let s_ = format!("{:?}", d); eprintln!("s_ {:?}", s_); // `s` and `s_` may differ, but `s.parse()` and `s_.parse()` must be same let d_ = match s_.parse::() { Ok(d) => d, Err(e) => { panic!("`{}` is parsed into `{:?}`, but reparsing that has failed: {}", s, d, e) } }; eprintln!("d_ {:?} (NaiveDate)", d_); assert!( d == d_, "`{}` is parsed into `{:?}`, but reparsed result \ `{:?}` does not match", s, d, d_ ); } // some invalid cases // since `ParseErrorKind` is private, all we can do is to check if there was an error let invalid = [ "", // empty "x", // invalid "Fri, 09 Aug 2013 GMT", // valid date, wrong format "Sat Jun 30 2012", // valid date, wrong format "1441497364.649", // valid datetime, wrong format "+1441497364.649", // valid datetime, wrong format "+1441497364", // valid datetime, wrong format "2014/02/03", // valid date, wrong format "2014", // datetime missing data "2014-01", // datetime missing data "2014-01-00", // invalid day "2014-11-32", // invalid day "2014-13-01", // invalid month "2014-13-57", // invalid month, day "9999999-9-9", // invalid year (out of bounds) ]; for &s in &invalid { eprintln!("test_date_from_str invalid {:?}", s); assert!(s.parse::().is_err()); } } #[test] fn test_date_parse_from_str() { let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); assert_eq!( NaiveDate::parse_from_str("2014-5-7T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), Ok(ymd(2014, 5, 7)) ); // ignore time and offset assert_eq!( NaiveDate::parse_from_str("2015-W06-1=2015-033", "%G-W%V-%u = %Y-%j"), Ok(ymd(2015, 2, 2)) ); assert_eq!(NaiveDate::parse_from_str("Fri, 09 Aug 13", "%a, %d %b %y"), Ok(ymd(2013, 8, 9))); assert!(NaiveDate::parse_from_str("Sat, 09 Aug 2013", "%a, %d %b %Y").is_err()); assert!(NaiveDate::parse_from_str("2014-57", "%Y-%m-%d").is_err()); assert!(NaiveDate::parse_from_str("2014", "%Y").is_err()); // insufficient assert_eq!( NaiveDate::parse_from_str("2020-01-0", "%Y-%W-%w").ok(), NaiveDate::from_ymd_opt(2020, 1, 12), ); assert_eq!( NaiveDate::parse_from_str("2019-01-0", "%Y-%W-%w").ok(), NaiveDate::from_ymd_opt(2019, 1, 13), ); } #[test] fn test_day_iterator_limit() { assert_eq!(NaiveDate::from_ymd_opt(MAX_YEAR, 12, 29).unwrap().iter_days().take(4).count(), 2); assert_eq!( NaiveDate::from_ymd_opt(MIN_YEAR, 1, 3).unwrap().iter_days().rev().take(4).count(), 2 ); } #[test] fn test_week_iterator_limit() { assert_eq!(NaiveDate::from_ymd_opt(MAX_YEAR, 12, 12).unwrap().iter_weeks().take(4).count(), 2); assert_eq!( NaiveDate::from_ymd_opt(MIN_YEAR, 1, 15).unwrap().iter_weeks().rev().take(4).count(), 2 ); } #[test] fn test_weeks_from() { // tests per: https://github.com/chronotope/chrono/issues/961 // these internally use `weeks_from` via the parsing infrastructure assert_eq!( NaiveDate::parse_from_str("2020-01-0", "%Y-%W-%w").ok(), NaiveDate::from_ymd_opt(2020, 1, 12), ); assert_eq!( NaiveDate::parse_from_str("2019-01-0", "%Y-%W-%w").ok(), NaiveDate::from_ymd_opt(2019, 1, 13), ); // direct tests for (y, starts_on) in &[ (2019, Weekday::Tue), (2020, Weekday::Wed), (2021, Weekday::Fri), (2022, Weekday::Sat), (2023, Weekday::Sun), (2024, Weekday::Mon), (2025, Weekday::Wed), (2026, Weekday::Thu), ] { for day in &[ Weekday::Mon, Weekday::Tue, Weekday::Wed, Weekday::Thu, Weekday::Fri, Weekday::Sat, Weekday::Sun, ] { assert_eq!( NaiveDate::from_ymd_opt(*y, 1, 1).map(|d| d.weeks_from(*day)), Some(if day == starts_on { 1 } else { 0 }) ); // last day must always be in week 52 or 53 assert!( [52, 53].contains(&NaiveDate::from_ymd_opt(*y, 12, 31).unwrap().weeks_from(*day)), ); } } let base = NaiveDate::from_ymd_opt(2019, 1, 1).unwrap(); // 400 years covers all year types for day in &[ Weekday::Mon, Weekday::Tue, Weekday::Wed, Weekday::Thu, Weekday::Fri, Weekday::Sat, Weekday::Sun, ] { // must always be below 54 for dplus in 1..(400 * 366) { assert!((base + Days::new(dplus)).weeks_from(*day) < 54) } } } #[test] fn test_with_0_overflow() { let dt = NaiveDate::from_ymd_opt(2023, 4, 18).unwrap(); assert!(dt.with_month0(4294967295).is_none()); assert!(dt.with_day0(4294967295).is_none()); assert!(dt.with_ordinal0(4294967295).is_none()); } #[test] fn test_leap_year() { for year in 0..=MAX_YEAR { let date = NaiveDate::from_ymd_opt(year, 1, 1).unwrap(); let is_leap = year % 4 == 0 && (year % 100 != 0 || year % 400 == 0); assert_eq!(date.leap_year(), is_leap); assert_eq!(date.leap_year(), date.with_ordinal(366).is_some()); } } #[test] fn test_date_yearflags() { for (year, year_flags, _) in YEAR_FLAGS { assert_eq!(NaiveDate::from_yo_opt(year, 1).unwrap().year_flags(), year_flags); } } #[test] fn test_weekday_with_yearflags() { for (year, year_flags, first_weekday) in YEAR_FLAGS { let first_day_of_year = NaiveDate::from_yo_opt(year, 1).unwrap(); dbg!(year); assert_eq!(first_day_of_year.year_flags(), year_flags); assert_eq!(first_day_of_year.weekday(), first_weekday); let mut prev = first_day_of_year.weekday(); for ordinal in 2u32..=year_flags.ndays() { let date = NaiveDate::from_yo_opt(year, ordinal).unwrap(); let expected = prev.succ(); assert_eq!(date.weekday(), expected); prev = expected; } } } #[test] fn test_isoweekdate_with_yearflags() { for (year, year_flags, _) in YEAR_FLAGS { // January 4 should be in the first week let jan4 = NaiveDate::from_ymd_opt(year, 1, 4).unwrap(); let iso_week = jan4.iso_week(); assert_eq!(jan4.year_flags(), year_flags); assert_eq!(iso_week.week(), 1); } } #[test] fn test_date_to_mdf_to_date() { for (year, year_flags, _) in YEAR_FLAGS { for ordinal in 1..=year_flags.ndays() { let date = NaiveDate::from_yo_opt(year, ordinal).unwrap(); assert_eq!(date, NaiveDate::from_mdf(date.year(), date.mdf()).unwrap()); } } } // Used for testing some methods with all combinations of `YearFlags`. // (year, flags, first weekday of year) const YEAR_FLAGS: [(i32, YearFlags, Weekday); 14] = [ (2006, A, Weekday::Sun), (2005, B, Weekday::Sat), (2010, C, Weekday::Fri), (2009, D, Weekday::Thu), (2003, E, Weekday::Wed), (2002, F, Weekday::Tue), (2001, G, Weekday::Mon), (2012, AG, Weekday::Sun), (2000, BA, Weekday::Sat), (2016, CB, Weekday::Fri), (2004, DC, Weekday::Thu), (2020, ED, Weekday::Wed), (2008, FE, Weekday::Tue), (2024, GF, Weekday::Mon), ]; #[test] #[cfg(feature = "rkyv-validation")] fn test_rkyv_validation() { let date_min = NaiveDate::MIN; let bytes = rkyv::to_bytes::<_, 4>(&date_min).unwrap(); assert_eq!(rkyv::from_bytes::(&bytes).unwrap(), date_min); let date_max = NaiveDate::MAX; let bytes = rkyv::to_bytes::<_, 4>(&date_max).unwrap(); assert_eq!(rkyv::from_bytes::(&bytes).unwrap(), date_max); } // MAX_YEAR-12-31 minus 0000-01-01 // = (MAX_YEAR-12-31 minus 0000-12-31) + (0000-12-31 - 0000-01-01) // = MAX_YEAR * 365 + (# of leap years from 0001 to MAX_YEAR) + 365 // = (MAX_YEAR + 1) * 365 + (# of leap years from 0001 to MAX_YEAR) const MAX_DAYS_FROM_YEAR_0: i32 = (MAX_YEAR + 1) * 365 + MAX_YEAR / 4 - MAX_YEAR / 100 + MAX_YEAR / 400; // MIN_YEAR-01-01 minus 0000-01-01 // = MIN_YEAR * 365 + (# of leap years from MIN_YEAR to 0000) const MIN_DAYS_FROM_YEAR_0: i32 = MIN_YEAR * 365 + MIN_YEAR / 4 - MIN_YEAR / 100 + MIN_YEAR / 400; // only used for testing, but duplicated in naive::datetime const MAX_BITS: usize = 44;