Intl Era Monthcode: Calendar PlainYearMonth tests, part 3

test/intl402/Temporal/PlainYearMonth/prototype/add/basic-buddhist.js

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+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.add
+description: >
+  Check various basic calculations not involving leap years or constraining
+  (buddhist calendar)
+features: [Temporal, Intl.Era-monthcode]
+includes: [temporalHelpers.js]
+---*/
+
+const calendar = "buddhist";
+
+const years1 = new Temporal.Duration(1);
+const years1n = new Temporal.Duration(-1);
+const years4 = new Temporal.Duration(4);
+const years4n = new Temporal.Duration(-4);
+
+const date256407 = Temporal.PlainYearMonth.from({ year: 2564, monthCode: "M07", calendar });
+
+TemporalHelpers.assertPlainYearMonth(
+  date256407.add(years1),
+  2565, 7, "M07", "add 1y",
+  "be", 2565, null);
+TemporalHelpers.assertPlainYearMonth(
+  date256407.add(years4),
+  2568, 7, "M07", "add 4y",
+  "be", 2568, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date256407.add(years1n),
+  2563, 7, "M07", "subtract 1y",
+  "be", 2563, null);
+TemporalHelpers.assertPlainYearMonth(
+  date256407.add(years4n),
+  2560, 7, "M07", "subtract 4y",
+  "be", 2560, null);
+
+// Months
+
+const months5 = new Temporal.Duration(0, 5);
+const months5n = new Temporal.Duration(0, -5);
+const months6 = new Temporal.Duration(0, 6);
+const months6n = new Temporal.Duration(0, -6);
+const years1months2 = new Temporal.Duration(1, 2);
+const years1months2n = new Temporal.Duration(-1, -2);
+
+const date255512 = Temporal.PlainYearMonth.from({ year: 2555, monthCode: "M12", calendar });
+
+TemporalHelpers.assertPlainYearMonth(
+  date256407.add(months5),
+  2564, 12, "M12", "add 5mo with result in the same year",
+  "be", 2564, null);
+TemporalHelpers.assertPlainYearMonth(
+  Temporal.PlainYearMonth.from({ year: 2564, monthCode: "M08", calendar }).add(months5),
+  2565, 1, "M01", "add 5mo with result in the next year",
+  "be", 2565, null);
+TemporalHelpers.assertPlainYearMonth(
+  Temporal.PlainYearMonth.from({ year: 2562, monthCode: "M10", calendar }).add(months5),
+  2563, 3, "M03", "add 5mo with result in the next year on day 1 of month",
+  "be", 2563, null);
+TemporalHelpers.assertPlainYearMonth(
+  Temporal.PlainYearMonth.from({ year: 2564, monthCode: "M10", calendar }).add(months5),
+  2565, 3, "M03", "add 5mo with result in the next year on day 31 of month",
+  "be", 2565, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date256407.add(years1months2),
+  2565, 9, "M09", "add 1y 2mo",
+  "be", 2565, null);
+TemporalHelpers.assertPlainYearMonth(
+  Temporal.PlainYearMonth.from({ year: 2564, monthCode: "M11", calendar }).add(years1months2),
+  2566, 1, "M01", "add 1y 2mo with result in the next year",
+  "be", 2566, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date256407.add(months5n),
+  2564, 2, "M02", "subtract 5mo with result in the same year",
+  "be", 2564, null);
+TemporalHelpers.assertPlainYearMonth(
+  Temporal.PlainYearMonth.from({ year: 2564, monthCode: "M01", calendar }).add(months5n),
+  2563, 8, "M08", "subtract 5mo with result in the previous year",
+  "be", 2563, null);
+TemporalHelpers.assertPlainYearMonth(
+  Temporal.PlainYearMonth.from({ year: 2562, monthCode: "M02", calendar }).add(months5n),
+  2561, 9, "M09", "subtract 5mo with result in the previous year on day 1 of month",
+  "be", 2561, null);
+TemporalHelpers.assertPlainYearMonth(
+  Temporal.PlainYearMonth.from({ year: 2564, monthCode: "M03", calendar }).add(months5n),
+  2563, 10, "M10", "subtract 5mo with result in the previous year on day 31 of month",
+  "be", 2563, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date256407.add(years1months2n),
+  2563, 5, "M05", "subtract 1y 2mo",
+  "be", 2563, null);
+TemporalHelpers.assertPlainYearMonth(
+  Temporal.PlainYearMonth.from({ year: 2564, monthCode: "M02", calendar }).add(years1months2n),
+  2562, 12, "M12", "subtract 1y 2mo with result in the previous year",
+  "be", 2562, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date255512.add(months6),
+  2556, 6, "M06", "add 6mo",
+  "be", 2556, null);
+const calculatedStart = date255512.add(months6).add(months6n);
+TemporalHelpers.assertPlainYearMonth(
+  calculatedStart,
+  2555, 12, "M12", "subtract 6mo",
+  "be", 2555, null);

test/intl402/Temporal/PlainYearMonth/prototype/add/basic-chinese.js

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+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.add
+description: Basic addition and subtraction in the chinese calendar
+features: [Temporal, Intl.Era-monthcode]
+includes: [temporalHelpers.js]
+---*/
+
+const calendar = "chinese";
+const options = { overflow: "reject" };
+
+// Years
+
+const years1 = new Temporal.Duration(1);
+const years1n = new Temporal.Duration(-1);
+const years5 = new Temporal.Duration(5);
+const years5n = new Temporal.Duration(-5);
+
+const date201802 = Temporal.PlainYearMonth.from({ year: 2018, monthCode: "M02", calendar }, options);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201802.add(years1),
+  2019, 2, "M02", "Adding 1 year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201802.add(years5),
+  2023, 2, "M02", "Adding 5 years",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201802.add(years1n),
+  2017, 2, "M02", "Subtracting 1 year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201802.add(years5n),
+  2013, 2, "M02", "Subtracting 5 years",
+  undefined, undefined, null);
+
+// Months
+
+const months1 = new Temporal.Duration(0, 1);
+const months1n = new Temporal.Duration(0, -1);
+const months4 = new Temporal.Duration(0, 4);
+const months4n = new Temporal.Duration(0, -4);
+const months6 = new Temporal.Duration(0, 6);
+const months6n = new Temporal.Duration(0, -6);
+
+const date201901 = Temporal.PlainYearMonth.from({ year: 2019, monthCode: "M01", calendar }, options);
+const date201906 = Temporal.PlainYearMonth.from({ year: 2019, monthCode: "M06", calendar }, options);
+const date201911 = Temporal.PlainYearMonth.from({ year: 2019, monthCode: "M11", calendar }, options);
+const date201912 = Temporal.PlainYearMonth.from({ year: 2019, monthCode: "M12", calendar }, options);
+const date200012 = Temporal.PlainYearMonth.from({ year: 2000, monthCode: "M12", calendar }, options);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201911.add(months1),
+  2019, 12, "M12", "Adding 1 month, with result in same year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201912.add(months1),
+  2020, 1, "M01", "Adding 1 month, with result in next year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201906.add(months4),
+  2019, 10, "M10", "Adding 4 months, with result in same year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201912.add(months4),
+  2020, 4, "M04", "Adding 4 months, with result in next year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201911.add(months1n),
+  2019, 10, "M10", "Subtracting 1 month, with result in same year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201901.add(months1n),
+  2018, 12, "M12", "Subtracting 1 month, with result in previous year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201906.add(months4n),
+  2019, 2, "M02", "Subtracting 4 months, with result in same year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date201901.add(months4n),
+  2018, 9, "M09", "Subtracting 4 months, with result in previous year",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date200012.add(months6),
+  2001, 6, "M05", "Adding 6 months, with result in next year (leap year)",
+  undefined, undefined, null);
+
+TemporalHelpers.assertPlainYearMonth(
+  date200012.add(months6n),
+  2000, 6, "M06", "Subtracting 6 months, with result in same year",
+  undefined, undefined, null);

test/intl402/Temporal/PlainYearMonth/prototype/add/basic-coptic.js

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+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.add
+description: Basic addition and subtraction in the coptic calendar
+features: [Temporal, Intl.Era-monthcode]
+includes: [temporalHelpers.js]
+---*/
+
+const calendar = "coptic";
+const options = { overflow: "reject" };
+
+// Years
+
+const years1 = new Temporal.Duration(1);
+const years1n = new Temporal.Duration(-1);
+const years5 = new Temporal.Duration(5);
+const years5n = new Temporal.Duration(-5);
+
+const date174202 = Temporal.PlainYearMonth.from({ year: 1742, monthCode: "M02", calendar }, options);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174202.add(years1),
+  1743, 2, "M02", "Adding 1 year", "am", 1743, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174202.add(years5),
+  1747, 2, "M02", "Adding 5 years", "am", 1747, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174202.add(years1n),
+  1741, 2, "M02", "Subtracting 1 year", "am", 1741, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174202.add(years5n),
+  1737, 2, "M02", "Subtracting 5 years", "am", 1737, null
+);
+
+// Months
+
+const months1 = new Temporal.Duration(0, 1);
+const months1n = new Temporal.Duration(0, -1);
+const months4 = new Temporal.Duration(0, 4);
+const months4n = new Temporal.Duration(0, -4);
+const months6 = new Temporal.Duration(0, 6);
+const months6n = new Temporal.Duration(0, -6);
+
+const date171612 = Temporal.PlainYearMonth.from({ year: 1716, monthCode: "M12", calendar }, options);
+const date174301 = Temporal.PlainYearMonth.from({ year: 1743, monthCode: "M01", calendar }, options);
+const date174306 = Temporal.PlainYearMonth.from({ year: 1743, monthCode: "M06", calendar }, options);
+const date174311 = Temporal.PlainYearMonth.from({ year: 1743, monthCode: "M11", calendar }, options);
+const date174213 = Temporal.PlainYearMonth.from({ year: 1742, monthCode: "M13", calendar }, options);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174311.add(months1),
+  1743, 12, "M12", "Adding 1 month, with result in same year", "am", 1743, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174213.add(months1),
+  1743, 1, "M01", "Adding 1 month, with result in next year", "am", 1743, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174306.add(months4),
+  1743, 10, "M10", "Adding 4 months, with result in same year", "am", 1743, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174213.add(months4),
+  1743, 4, "M04", "Adding 4 months, with result in next year", "am", 1743, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174311.add(months1n),
+  1743, 10, "M10", "Subtracting 1 month, with result in same year", "am", 1743, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174301.add(months1n),
+  1742, 13, "M13", "Subtracting 1 month, with result in previous year", "am", 1742, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174306.add(months4n),
+  1743, 2, "M02", "Subtracting 4 months, with result in same year", "am", 1743, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date174301.add(months4n),
+  1742, 10, "M10", "Subtracting 4 months, with result in previous year", "am", 1742, null
+);
+
+TemporalHelpers.assertPlainYearMonth(
+  date171612.add(months6),
+  1717, 5, "M05", "Adding 6 months, with result in next year", "am", 1717, null
+);
+const calculatedStart = date171612.add(months6).add(months6n);
+TemporalHelpers.assertPlainYearMonth(
+  calculatedStart,
+  1716, 12, "M12", "Subtracting 6 months, with result in previous year", "am", 1716, null
+);