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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
//! This module contains types and implementations for the Korean Dangi calendar.
//!
//! ```rust
//! use icu::calendar::dangi::Dangi;
//! use icu::calendar::{Date, DateTime, Ref};
//!
//! let dangi = Dangi::new();
//! let dangi = Ref(&dangi); // to avoid cloning
//!
//! // `Date` type
//! let dangi_date = Date::try_new_dangi_date_with_calendar(4356, 6, 6, dangi)
//! .expect("Failed to initialize Dangi Date instance.");
//!
//! // `DateTime` type
//! let dangi_datetime = DateTime::try_new_dangi_datetime_with_calendar(
//! 4356, 6, 6, 13, 1, 0, dangi,
//! )
//! .expect("Failed to initialize Dangi DateTime instance.");
//!
//! // `Date` checks
//! assert_eq!(dangi_date.year().number, 4356);
//! assert_eq!(dangi_date.year().related_iso, Some(2023));
//! assert_eq!(dangi_date.year().cyclic.unwrap().get(), 40);
//! assert_eq!(dangi_date.month().ordinal, 6);
//! assert_eq!(dangi_date.day_of_month().0, 6);
//!
//! // `DateTime` checks
//! assert_eq!(dangi_datetime.date.year().number, 4356);
//! assert_eq!(dangi_datetime.date.year().related_iso, Some(2023));
//! assert_eq!(dangi_datetime.date.year().cyclic.unwrap().get(), 40);
//! assert_eq!(dangi_datetime.date.month().ordinal, 6);
//! assert_eq!(dangi_datetime.date.day_of_month().0, 6);
//! assert_eq!(dangi_datetime.time.hour.number(), 13);
//! assert_eq!(dangi_datetime.time.minute.number(), 1);
//! assert_eq!(dangi_datetime.time.second.number(), 0);
//! ```
use crate::calendar_arithmetic::CalendarArithmetic;
use crate::calendar_arithmetic::PrecomputedDataSource;
use crate::chinese_based::{
chinese_based_ordinal_lunar_month_from_code, ChineseBasedPrecomputedData,
ChineseBasedWithDataLoading, ChineseBasedYearInfo,
};
use crate::provider::chinese_based::DangiCacheV1Marker;
use crate::AsCalendar;
use crate::{
chinese_based::ChineseBasedDateInner,
types::{self, Era, FormattableYear},
AnyCalendarKind, Calendar, CalendarError, Date, DateTime, Iso, Time,
};
use core::cmp::Ordering;
use core::num::NonZeroU8;
use icu_provider::prelude::*;
use tinystr::tinystr;
/// The Dangi Calendar
///
/// The Dangi Calendar is a lunisolar calendar used traditionally in North and South Korea.
/// It is often used today to track important cultural events and holidays like Seollal
/// (Korean lunar new year). It is similar to the Chinese lunar calendar (see `Chinese`),
/// except that observations are based in Korea (currently UTC+9) rather than China (UTC+8).
/// This can cause some differences; for example, 2012 was a leap year, but in the Dangi
/// calendar the leap month was 3, while in the Chinese calendar the leap month was 4.
///
/// This calendar is currently in a preview state: formatting for this calendar is not
/// going to be perfect.
///
/// ```rust
/// use icu::calendar::{chinese::Chinese, dangi::Dangi, Date};
/// use tinystr::tinystr;
///
/// let iso_a = Date::try_new_iso_date(2012, 4, 23).unwrap();
/// let dangi_a = iso_a.to_calendar(Dangi::new());
/// let chinese_a = iso_a.to_calendar(Chinese::new());
///
/// assert_eq!(dangi_a.month().code.0, tinystr!(4, "M03L"));
/// assert_eq!(chinese_a.month().code.0, tinystr!(4, "M04"));
///
/// let iso_b = Date::try_new_iso_date(2012, 5, 23).unwrap();
/// let dangi_b = iso_b.to_calendar(Dangi::new());
/// let chinese_b = iso_b.to_calendar(Chinese::new());
///
/// assert_eq!(dangi_b.month().code.0, tinystr!(4, "M04"));
/// assert_eq!(chinese_b.month().code.0, tinystr!(4, "M04L"));
/// ```
/// # Era codes
///
/// This Calendar supports a single era code "dangi" based on the year -2332 ISO (2333 BCE) as year 1. Typically
/// years will be formatted using cyclic years and the related ISO year.
///
/// # Month codes
///
/// This calendar is a lunisolar calendar. It supports regular month codes `"M01" - "M12"` as well
/// as leap month codes `"M01L" - "M12L"`.
#[derive(Clone, Debug, Default)]
pub struct Dangi {
data: Option<DataPayload<DangiCacheV1Marker>>,
}
/// The inner date type used for representing [`Date`]s of [`Dangi`]. See [`Date`] and [`Dangi`] for more detail.
#[derive(Debug, Eq, PartialEq, PartialOrd, Ord)]
pub struct DangiDateInner(ChineseBasedDateInner<Dangi>);
type Inner = ChineseBasedDateInner<Dangi>;
// we want these impls without the `C: Copy/Clone` bounds
impl Copy for DangiDateInner {}
impl Clone for DangiDateInner {
fn clone(&self) -> Self {
*self
}
}
// These impls just make custom derives on types containing C
// work. They're basically no-ops
impl PartialEq for Dangi {
fn eq(&self, _: &Self) -> bool {
true
}
}
impl Eq for Dangi {}
#[allow(clippy::non_canonical_partial_ord_impl)] // this is intentional
impl PartialOrd for Dangi {
fn partial_cmp(&self, _: &Self) -> Option<Ordering> {
Some(Ordering::Equal)
}
}
impl Ord for Dangi {
fn cmp(&self, _: &Self) -> Ordering {
Ordering::Equal
}
}
impl Dangi {
/// Creates a new [`Dangi`] with some precomputed calendrical calculations.
///
/// ✨ *Enabled with the `compiled_data` Cargo feature.*
///
/// [📚 Help choosing a constructor](icu_provider::constructors)
#[cfg(feature = "compiled_data")]
pub const fn new() -> Self {
Self {
data: Some(DataPayload::from_static_ref(
crate::provider::Baked::SINGLETON_CALENDAR_DANGICACHE_V1,
)),
}
}
icu_provider::gen_any_buffer_data_constructors!(locale: skip, options: skip, error: CalendarError,
#[cfg(skip)]
functions: [
new,
try_new_with_any_provider,
try_new_with_buffer_provider,
try_new_unstable,
Self,
]);
#[doc = icu_provider::gen_any_buffer_unstable_docs!(UNSTABLE, Self::new)]
pub fn try_new_unstable<D: DataProvider<DangiCacheV1Marker> + ?Sized>(
provider: &D,
) -> Result<Self, CalendarError> {
Ok(Self {
data: Some(provider.load(Default::default())?.take_payload()?),
})
}
/// Construct a new [`Dangi`] without any precomputed calendrical calculations.
pub fn new_always_calculating() -> Self {
Dangi { data: None }
}
pub(crate) const DEBUG_NAME: &'static str = "Dangi";
}
impl Calendar for Dangi {
type DateInner = DangiDateInner;
fn date_from_codes(
&self,
era: crate::types::Era,
year: i32,
month_code: crate::types::MonthCode,
day: u8,
) -> Result<Self::DateInner, crate::Error> {
let year_info = self.get_precomputed_data().load_or_compute_info(year);
let month = if let Some(ordinal) =
chinese_based_ordinal_lunar_month_from_code(month_code, year_info)
{
ordinal
} else {
return Err(CalendarError::UnknownMonthCode(
month_code.0,
self.debug_name(),
));
};
if era.0 != tinystr!(16, "dangi") {
return Err(CalendarError::UnknownEra(era.0, self.debug_name()));
}
let arithmetic = Inner::new_from_ordinals(year, month, day, year_info);
Ok(DangiDateInner(ChineseBasedDateInner(arithmetic?)))
}
fn date_from_iso(&self, iso: Date<crate::Iso>) -> Self::DateInner {
let fixed = Iso::fixed_from_iso(iso.inner);
DangiDateInner(Inner::chinese_based_date_from_fixed(
self,
fixed,
iso.inner.0,
))
}
fn date_to_iso(&self, date: &Self::DateInner) -> Date<crate::Iso> {
let fixed = Inner::fixed_from_chinese_based_date_inner(date.0);
Iso::iso_from_fixed(fixed)
}
fn months_in_year(&self, date: &Self::DateInner) -> u8 {
date.0.months_in_year_inner()
}
fn days_in_year(&self, date: &Self::DateInner) -> u16 {
date.0.days_in_year_inner()
}
fn days_in_month(&self, date: &Self::DateInner) -> u8 {
date.0.days_in_month_inner()
}
fn offset_date(&self, date: &mut Self::DateInner, offset: crate::DateDuration<Self>) {
date.0 .0.offset_date(offset, &self.get_precomputed_data());
}
fn until(
&self,
date1: &Self::DateInner,
date2: &Self::DateInner,
_calendar2: &Self,
largest_unit: crate::DateDurationUnit,
smallest_unit: crate::DateDurationUnit,
) -> crate::DateDuration<Self> {
date1.0 .0.until(date2.0 .0, largest_unit, smallest_unit)
}
fn debug_name(&self) -> &'static str {
Self::DEBUG_NAME
}
fn year(&self, date: &Self::DateInner) -> crate::types::FormattableYear {
Self::format_dangi_year(date.0 .0.year, Some(date.0 .0.year_info))
}
fn is_in_leap_year(&self, date: &Self::DateInner) -> bool {
Self::is_leap_year(date.0 .0.year, date.0 .0.year_info)
}
fn month(&self, date: &Self::DateInner) -> crate::types::FormattableMonth {
date.0.month()
}
fn day_of_month(&self, date: &Self::DateInner) -> crate::types::DayOfMonth {
types::DayOfMonth(date.0 .0.day as u32)
}
fn day_of_year_info(&self, date: &Self::DateInner) -> crate::types::DayOfYearInfo {
let prev_year = date.0 .0.year.saturating_sub(1);
let next_year = date.0 .0.year.saturating_add(1);
types::DayOfYearInfo {
day_of_year: date.0 .0.day_of_year(),
days_in_year: date.0.days_in_year_inner(),
prev_year: Self::format_dangi_year(prev_year, None),
days_in_prev_year: date.0.days_in_prev_year(),
next_year: Self::format_dangi_year(next_year, None),
}
}
fn day_of_week(&self, date: &Self::DateInner) -> crate::types::IsoWeekday {
self.date_to_iso(date).day_of_week()
}
fn any_calendar_kind(&self) -> Option<crate::AnyCalendarKind> {
Some(AnyCalendarKind::Dangi)
}
}
impl<A: AsCalendar<Calendar = Dangi>> Date<A> {
/// Construct a new Dangi date from a `year`, `month`, and `day`.
/// `year` represents the Chinese year counted infinitely with -2332 (2333 BCE) as year 1;
/// `month` represents the month of the year ordinally (ex. if it is a leap year, the last month will be 13, not 12);
/// `day` indicates day of month.
///
/// This date will not use any precomputed calendrical calculations,
/// one that loads such data from a provider will be added in the future (#3933)
///
/// ```rust
/// use icu::calendar::dangi::Dangi;
/// use icu::calendar::Date;
///
/// let dangi = Dangi::new();
///
/// let date_dangi = Date::try_new_dangi_date_with_calendar(4356, 6, 18, dangi)
/// .expect("Failed to initialize Dangi Date instance.");
///
/// assert_eq!(date_dangi.year().number, 4356);
/// assert_eq!(date_dangi.year().cyclic.unwrap().get(), 40);
/// assert_eq!(date_dangi.year().related_iso, Some(2023));
/// assert_eq!(date_dangi.month().ordinal, 6);
/// assert_eq!(date_dangi.day_of_month().0, 18);
/// ```
pub fn try_new_dangi_date_with_calendar(
year: i32,
month: u8,
day: u8,
calendar: A,
) -> Result<Date<A>, CalendarError> {
let year_info = calendar
.as_calendar()
.get_precomputed_data()
.load_or_compute_info(year);
let arithmetic = Inner::new_from_ordinals(year, month, day, year_info);
Ok(Date::from_raw(
DangiDateInner(ChineseBasedDateInner(arithmetic?)),
calendar,
))
}
}
impl<A: AsCalendar<Calendar = Dangi>> DateTime<A> {
/// Construct a new Dangi DateTime from integers. See `try_new_dangi_date_with_calendar`.
///
/// This datetime will not use any precomputed calendrical calculations,
/// one that loads such data from a provider will be added in the future (#3933)
///
/// ```rust
/// use icu::calendar::dangi::Dangi;
/// use icu::calendar::DateTime;
///
/// let dangi = Dangi::new();
///
/// let dangi_datetime = DateTime::try_new_dangi_datetime_with_calendar(
/// 4356, 6, 6, 13, 1, 0, dangi,
/// )
/// .expect("Failed to initialize Dangi DateTime instance.");
///
/// assert_eq!(dangi_datetime.date.year().number, 4356);
/// assert_eq!(dangi_datetime.date.year().related_iso, Some(2023));
/// assert_eq!(dangi_datetime.date.year().cyclic.unwrap().get(), 40);
/// assert_eq!(dangi_datetime.date.month().ordinal, 6);
/// assert_eq!(dangi_datetime.date.day_of_month().0, 6);
/// assert_eq!(dangi_datetime.time.hour.number(), 13);
/// assert_eq!(dangi_datetime.time.minute.number(), 1);
/// assert_eq!(dangi_datetime.time.second.number(), 0);
/// ```
pub fn try_new_dangi_datetime_with_calendar(
year: i32,
month: u8,
day: u8,
hour: u8,
minute: u8,
second: u8,
calendar: A,
) -> Result<DateTime<A>, CalendarError> {
Ok(DateTime {
date: Date::try_new_dangi_date_with_calendar(year, month, day, calendar)?,
time: Time::try_new(hour, minute, second, 0)?,
})
}
}
type DangiCB = calendrical_calculations::chinese_based::Dangi;
impl ChineseBasedWithDataLoading for Dangi {
type CB = DangiCB;
fn get_precomputed_data(&self) -> ChineseBasedPrecomputedData<Self::CB> {
ChineseBasedPrecomputedData::new(self.data.as_ref().map(|d| d.get()))
}
}
impl Dangi {
/// Get a `FormattableYear` from an integer Dangi year; optionally, a `ChineseBasedYearInfo`
/// can be passed in for faster results.
fn format_dangi_year(
year: i32,
year_info_option: Option<ChineseBasedYearInfo>,
) -> FormattableYear {
let era = Era(tinystr!(16, "dangi"));
let number = year;
let cyclic = (number as i64 - 1 + 364).rem_euclid(60) as u8;
let cyclic = NonZeroU8::new(cyclic + 1); // 1-indexed
let rata_die_in_year = if let Some(info) = year_info_option {
info.new_year::<DangiCB>(year)
} else {
Inner::fixed_mid_year_from_year(number)
};
let iso_formattable_year = Iso::iso_from_fixed(rata_die_in_year).year();
let related_iso = Some(iso_formattable_year.number);
types::FormattableYear {
era,
number,
cyclic,
related_iso,
}
}
}
#[cfg(test)]
mod test {
use super::*;
use crate::chinese::Chinese;
use calendrical_calculations::rata_die::RataDie;
/// Run a test twice, with two calendars
fn do_twice(
dangi_calculating: &Dangi,
dangi_cached: &Dangi,
test: impl Fn(crate::Ref<Dangi>, &'static str),
) {
test(crate::Ref(dangi_calculating), "calculating");
test(crate::Ref(dangi_cached), "cached");
}
fn check_cyclic_and_rel_iso(year: i32) {
let iso = Date::try_new_iso_date(year, 6, 6).unwrap();
let chinese = iso.to_calendar(Chinese::new_always_calculating());
let dangi = iso.to_calendar(Dangi::new_always_calculating());
let chinese_year = chinese.year().cyclic;
let korean_year = dangi.year().cyclic;
assert_eq!(
chinese_year, korean_year,
"Cyclic year failed for year: {year}"
);
let chinese_rel_iso = chinese.year().related_iso;
let korean_rel_iso = dangi.year().related_iso;
assert_eq!(
chinese_rel_iso, korean_rel_iso,
"Rel. ISO year equality failed for year: {year}"
);
assert_eq!(korean_rel_iso, Some(year), "Dangi Rel. ISO failed!");
}
#[test]
fn test_cyclic_same_as_chinese_near_present_day() {
for year in 1923..=2123 {
check_cyclic_and_rel_iso(year);
}
}
#[test]
fn test_cyclic_same_as_chinese_near_rd_zero() {
for year in -100..=100 {
check_cyclic_and_rel_iso(year);
}
}
#[test]
fn test_iso_to_dangi_roundtrip() {
let mut fixed = -1963020;
let max_fixed = 1963020;
let mut iters = 0;
let max_iters = 560;
let dangi_calculating = Dangi::new_always_calculating();
let dangi_cached = Dangi::new();
while fixed < max_fixed && iters < max_iters {
let rata_die = RataDie::new(fixed);
let iso = Iso::iso_from_fixed(rata_die);
do_twice(&dangi_calculating, &dangi_cached, |dangi, calendar_type| {
let korean = iso.to_calendar(dangi);
let result = korean.to_calendar(Iso);
assert_eq!(
iso, result,
"[{calendar_type}] Failed roundtrip ISO -> Dangi -> ISO for fixed: {fixed}"
);
});
fixed += 7043;
iters += 1;
}
}
#[test]
fn test_dangi_consistent_with_icu() {
// Test cases for this test are derived from existing ICU Intl.DateTimeFormat. If there is a bug in ICU,
// these test cases may be affected, and this calendar's output may not be entirely valid.
// There are a number of test cases which do not match ICU for dates very far in the past or future,
// see #3709.
#[derive(Debug)]
struct TestCase {
iso_year: i32,
iso_month: u8,
iso_day: u8,
expected_rel_iso: i32,
expected_cyclic: u8,
expected_month: u32,
expected_day: u32,
}
let cases = [
TestCase {
// #3709: This test case fails to match ICU
iso_year: 4321,
iso_month: 1,
iso_day: 23,
expected_rel_iso: 4320,
expected_cyclic: 57,
expected_month: 13,
expected_day: 12,
},
TestCase {
iso_year: 3649,
iso_month: 9,
iso_day: 20,
expected_rel_iso: 3649,
expected_cyclic: 46,
expected_month: 9,
expected_day: 1,
},
TestCase {
iso_year: 3333,
iso_month: 3,
iso_day: 3,
expected_rel_iso: 3333,
expected_cyclic: 30,
expected_month: 1,
expected_day: 25,
},
TestCase {
iso_year: 3000,
iso_month: 3,
iso_day: 30,
expected_rel_iso: 3000,
expected_cyclic: 57,
expected_month: 3,
expected_day: 3,
},
TestCase {
iso_year: 2772,
iso_month: 7,
iso_day: 27,
expected_rel_iso: 2772,
expected_cyclic: 9,
expected_month: 7,
expected_day: 5,
},
TestCase {
iso_year: 2525,
iso_month: 2,
iso_day: 25,
expected_rel_iso: 2525,
expected_cyclic: 2,
expected_month: 2,
expected_day: 3,
},
TestCase {
iso_year: 2345,
iso_month: 3,
iso_day: 21,
expected_rel_iso: 2345,
expected_cyclic: 2,
expected_month: 2,
expected_day: 17,
},
TestCase {
iso_year: 2222,
iso_month: 2,
iso_day: 22,
expected_rel_iso: 2222,
expected_cyclic: 59,
expected_month: 1,
expected_day: 11,
},
TestCase {
iso_year: 2167,
iso_month: 6,
iso_day: 22,
expected_rel_iso: 2167,
expected_cyclic: 4,
expected_month: 5,
expected_day: 6,
},
TestCase {
iso_year: 2121,
iso_month: 2,
iso_day: 12,
expected_rel_iso: 2120,
expected_cyclic: 17,
expected_month: 13,
expected_day: 25,
},
TestCase {
iso_year: 2080,
iso_month: 12,
iso_day: 31,
expected_rel_iso: 2080,
expected_cyclic: 37,
expected_month: 12,
expected_day: 21,
},
TestCase {
iso_year: 2030,
iso_month: 3,
iso_day: 20,
expected_rel_iso: 2030,
expected_cyclic: 47,
expected_month: 2,
expected_day: 17,
},
TestCase {
iso_year: 2027,
iso_month: 2,
iso_day: 7,
expected_rel_iso: 2027,
expected_cyclic: 44,
expected_month: 1,
expected_day: 1,
},
TestCase {
iso_year: 2023,
iso_month: 7,
iso_day: 1,
expected_rel_iso: 2023,
expected_cyclic: 40,
expected_month: 6,
expected_day: 14,
},
TestCase {
iso_year: 2022,
iso_month: 3,
iso_day: 1,
expected_rel_iso: 2022,
expected_cyclic: 39,
expected_month: 1,
expected_day: 29,
},
TestCase {
iso_year: 2021,
iso_month: 2,
iso_day: 1,
expected_rel_iso: 2020,
expected_cyclic: 37,
expected_month: 13,
expected_day: 20,
},
TestCase {
iso_year: 2016,
iso_month: 3,
iso_day: 30,
expected_rel_iso: 2016,
expected_cyclic: 33,
expected_month: 2,
expected_day: 22,
},
TestCase {
iso_year: 2016,
iso_month: 7,
iso_day: 30,
expected_rel_iso: 2016,
expected_cyclic: 33,
expected_month: 6,
expected_day: 27,
},
TestCase {
iso_year: 2015,
iso_month: 9,
iso_day: 22,
expected_rel_iso: 2015,
expected_cyclic: 32,
expected_month: 8,
expected_day: 10,
},
TestCase {
iso_year: 2013,
iso_month: 10,
iso_day: 1,
expected_rel_iso: 2013,
expected_cyclic: 30,
expected_month: 8,
expected_day: 27,
},
TestCase {
iso_year: 2010,
iso_month: 2,
iso_day: 1,
expected_rel_iso: 2009,
expected_cyclic: 26,
expected_month: 13,
expected_day: 18,
},
TestCase {
iso_year: 2000,
iso_month: 8,
iso_day: 30,
expected_rel_iso: 2000,
expected_cyclic: 17,
expected_month: 8,
expected_day: 2,
},
TestCase {
iso_year: 1990,
iso_month: 11,
iso_day: 11,
expected_rel_iso: 1990,
expected_cyclic: 7,
expected_month: 10,
expected_day: 24,
},
TestCase {
iso_year: 1970,
iso_month: 6,
iso_day: 10,
expected_rel_iso: 1970,
expected_cyclic: 47,
expected_month: 5,
expected_day: 7,
},
TestCase {
iso_year: 1970,
iso_month: 1,
iso_day: 1,
expected_rel_iso: 1969,
expected_cyclic: 46,
expected_month: 11,
expected_day: 24,
},
TestCase {
iso_year: 1941,
iso_month: 12,
iso_day: 7,
expected_rel_iso: 1941,
expected_cyclic: 18,
expected_month: 11,
expected_day: 19,
},
TestCase {
iso_year: 1812,
iso_month: 5,
iso_day: 4,
expected_rel_iso: 1812,
expected_cyclic: 9,
expected_month: 3,
expected_day: 24,
},
TestCase {
iso_year: 1655,
iso_month: 6,
iso_day: 15,
expected_rel_iso: 1655,
expected_cyclic: 32,
expected_month: 5,
expected_day: 12,
},
TestCase {
iso_year: 1333,
iso_month: 3,
iso_day: 10,
expected_rel_iso: 1333,
expected_cyclic: 10,
expected_month: 2,
expected_day: 16,
},
TestCase {
iso_year: 1000,
iso_month: 10,
iso_day: 10,
expected_rel_iso: 1000,
expected_cyclic: 37,
expected_month: 9,
expected_day: 5,
},
TestCase {
iso_year: 842,
iso_month: 2,
iso_day: 15,
expected_rel_iso: 841,
expected_cyclic: 58,
expected_month: 13,
expected_day: 28,
},
TestCase {
iso_year: 101,
iso_month: 1,
iso_day: 10,
expected_rel_iso: 100,
expected_cyclic: 37,
expected_month: 12,
expected_day: 24,
},
TestCase {
iso_year: -1,
iso_month: 3,
iso_day: 28,
expected_rel_iso: -1,
expected_cyclic: 56,
expected_month: 2,
expected_day: 25,
},
TestCase {
iso_year: -3,
iso_month: 2,
iso_day: 28,
expected_rel_iso: -3,
expected_cyclic: 54,
expected_month: 2,
expected_day: 5,
},
TestCase {
iso_year: -365,
iso_month: 7,
iso_day: 24,
expected_rel_iso: -365,
expected_cyclic: 52,
expected_month: 6,
expected_day: 24,
},
TestCase {
iso_year: -999,
iso_month: 9,
iso_day: 9,
expected_rel_iso: -999,
expected_cyclic: 18,
expected_month: 7,
expected_day: 27,
},
TestCase {
iso_year: -1500,
iso_month: 1,
iso_day: 5,
expected_rel_iso: -1501,
expected_cyclic: 56,
expected_month: 12,
expected_day: 2,
},
TestCase {
iso_year: -2332,
iso_month: 3,
iso_day: 1,
expected_rel_iso: -2332,
expected_cyclic: 5,
expected_month: 1,
expected_day: 16,
},
TestCase {
iso_year: -2332,
iso_month: 2,
iso_day: 15,
expected_rel_iso: -2332,
expected_cyclic: 5,
expected_month: 1,
expected_day: 1,
},
TestCase {
// #3709: This test case fails to match ICU
iso_year: -2332,
iso_month: 2,
iso_day: 14,
expected_rel_iso: -2333,
expected_cyclic: 4,
expected_month: 13,
expected_day: 30,
},
TestCase {
// #3709: This test case fails to match ICU
iso_year: -2332,
iso_month: 1,
iso_day: 17,
expected_rel_iso: -2333,
expected_cyclic: 4,
expected_month: 13,
expected_day: 2,
},
TestCase {
// #3709: This test case fails to match ICU
iso_year: -2332,
iso_month: 1,
iso_day: 16,
expected_rel_iso: -2333,
expected_cyclic: 4,
expected_month: 13,
expected_day: 1,
},
TestCase {
iso_year: -2332,
iso_month: 1,
iso_day: 15,
expected_rel_iso: -2333,
expected_cyclic: 4,
expected_month: 12,
expected_day: 29,
},
TestCase {
iso_year: -2332,
iso_month: 1,
iso_day: 1,
expected_rel_iso: -2333,
expected_cyclic: 4,
expected_month: 12,
expected_day: 15,
},
TestCase {
iso_year: -2333,
iso_month: 1,
iso_day: 16,
expected_rel_iso: -2334,
expected_cyclic: 3,
expected_month: 12,
expected_day: 19,
},
TestCase {
iso_year: -2333,
iso_month: 1,
iso_day: 27,
expected_rel_iso: -2333,
expected_cyclic: 4,
expected_month: 1,
expected_day: 1,
},
TestCase {
iso_year: -2333,
iso_month: 1,
iso_day: 26,
expected_rel_iso: -2334,
expected_cyclic: 3,
expected_month: 12,
expected_day: 29,
},
TestCase {
iso_year: -2600,
iso_month: 9,
iso_day: 16,
expected_rel_iso: -2600,
expected_cyclic: 37,
expected_month: 8,
expected_day: 16,
},
TestCase {
iso_year: -2855,
iso_month: 2,
iso_day: 3,
expected_rel_iso: -2856,
expected_cyclic: 21,
expected_month: 12,
expected_day: 30,
},
TestCase {
// #3709: This test case fails to match ICU
iso_year: -3000,
iso_month: 5,
iso_day: 15,
expected_rel_iso: -3000,
expected_cyclic: 57,
expected_month: 4,
expected_day: 1,
},
TestCase {
// #3709: This test case fails to match ICU
iso_year: -3649,
iso_month: 9,
iso_day: 20,
expected_rel_iso: -3649,
expected_cyclic: 8,
expected_month: 8,
expected_day: 10,
},
TestCase {
// #3709: This test case fails to match ICU
iso_year: -3649,
iso_month: 3,
iso_day: 30,
expected_rel_iso: -3649,
expected_cyclic: 8,
expected_month: 2,
expected_day: 14,
},
TestCase {
// #3709: This test case fails to match ICU
iso_year: -3650,
iso_month: 3,
iso_day: 30,
expected_rel_iso: -3650,
expected_cyclic: 7,
expected_month: 3,
expected_day: 3,
},
];
let dangi_calculating = Dangi::new_always_calculating();
let dangi_cached = Dangi::new();
for case in cases {
let iso = Date::try_new_iso_date(case.iso_year, case.iso_month, case.iso_day).unwrap();
do_twice(&dangi_calculating, &dangi_cached, |dangi, calendar_type| {
let dangi = iso.to_calendar(dangi);
let dangi_rel_iso = dangi.year().related_iso;
let dangi_cyclic = dangi.year().cyclic;
let dangi_month = dangi.month().ordinal;
let dangi_day = dangi.day_of_month().0;
assert_eq!(
dangi_rel_iso,
Some(case.expected_rel_iso),
"[{calendar_type}] Related ISO failed for test case: {case:?}"
);
assert_eq!(
dangi_cyclic.unwrap().get(),
case.expected_cyclic,
"[{calendar_type}] Cyclic year failed for test case: {case:?}"
);
assert_eq!(
dangi_month, case.expected_month,
"[{calendar_type}] Month failed for test case: {case:?}"
);
assert_eq!(
dangi_day, case.expected_day,
"[{calendar_type}] Day failed for test case: {case:?}"
);
});
}
}
}