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// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
// Copyright (C) 2024 Mozilla Corporation. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-temporal.plainmonthday.from
features: [Temporal]
description: Check correct results for 30-day leap months
includes: [temporalHelpers.js]
---*/
// Common leap months should find a result not too far into the past.
//
// Month -> ISO year
//
// M01L <uncommon>
// M02L 1765
// M03L 1955
// M04L 1944
// M05L 1952
// M06L 1941
// M07L 1938
// M08L 1718
// M09L <uncommon>
// M10L <uncommon>
// M11L <uncommon>
// M12L <uncommon>
//
// M02L and M08L with 29 days is common, but with 30 is actually rather uncommon.
//
// See also "The Mathematics of the Chinese Calendar", Table 21 [1] for a
// distribution of leap months.
//
// In this test, we skip the months whose most recent year is outside
// the range 1900-2100.
const monthCodesWithYears = [
{ monthCode: "M03L", referenceYear: 1955 },
{ monthCode: "M04L", referenceYear: 1944 },
{ monthCode: "M05L", referenceYear: 1952 },
{ monthCode: "M06L", referenceYear: 1941 },
{ monthCode: "M07L", referenceYear: 1938 }
];
const calendar = "chinese";
// Months can have up to 30 days.
const day = 30;
for (let {monthCode, referenceYear} of monthCodesWithYears) {
let pmd = Temporal.PlainMonthDay.from({calendar, monthCode, day});
TemporalHelpers.assertPlainMonthDay(pmd, monthCode, day, monthCode, referenceYear);
let constrain = Temporal.PlainMonthDay.from({calendar, monthCode, day: day + 1}, {overflow: "constrain"});
TemporalHelpers.assertPlainMonthDay(constrain, monthCode, day, `${monthCode} (constrained)`, referenceYear);
assert.sameValue(constrain.equals(pmd), true);
assert.throws(RangeError, () => {
Temporal.PlainMonthDay.from({calendar, monthCode, day: day + 1}, {overflow: "reject"});
});
}
reportCompare(0, 0);