Intl Era Monthcode: Test constraining day at end of Hebrew months

This adds tests for constraining the day when adding years and months in
the Hebrew calendars. Test that 30 gets constrained to 29 in 29-day
months. There are special test cases for the variable lengths of
Cheshvan (M02) and Kislev (M03).

Author: ptomato

test/intl402/Temporal/PlainDate/prototype/add/constrain-day-hebrew.js

@@ -0,0 +1,256 @@
+// 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.plaindate.prototype.with
+description: Constraining the day at end of month (hebrew calendar)
+includes: [temporalHelpers.js]
+features: [Temporal, Intl.Era-monthcode]
+---*/
+
+const calendar = "hebrew";
+const options = { overflow: "reject" };
+
+// 30-day months: 01, 05, 05L, 07, 09, 11
+// 29-day months: 04, 06, 08, 10, 12
+//
+// Cheshvan and Kislev (02, 03) have 29 or 30 days, independent of leap years.
+// Deficient - Cheshvan and Kislev have 29 days
+// Regular - Cheshvan has 29 days, Kislev 30
+// Complete - Cheshvan and Kislev have 30 days
+//
+// Some recent years of each type: 
+// 5778 - regular common year
+// 5779 - complete leap year
+// 5781 - deficient common year
+// 5782 - regular leap year
+// 5783 - complete common year
+// 5784 - deficient leap year
+
+// Years
+
+const rcM03 = Temporal.PlainDate.from({ year: 5778, monthCode: "M03", day: 30, calendar }, options);
+const clM02 = Temporal.PlainDate.from({ year: 5779, monthCode: "M02", day: 30, calendar }, options);
+const clM03 = Temporal.PlainDate.from({ year: 5779, monthCode: "M03", day: 30, calendar }, options);
+
+TemporalHelpers.assertPlainDate(
+  rcM03.with({ year: 5781 }),
+  5781, 3, "M03", 29, "regular-year Kislev constrains to 29 in deficient year",
+  "am", 5781);
+assert.throws(RangeError, function () {
+  rcM03.with({ year: 5781 }, options);
+}, "regular-year Kislev rejects 30 in deficient year");
+
+TemporalHelpers.assertPlainDate(
+  clM02.with({ year: 5782 }),
+  5782, 2, "M02", 29, "complete-year Cheshvan constrains to 29 in regular year",
+  "am", 5782);
+assert.throws(RangeError, function () {
+  clM02.with({ year: 5782 }, options);
+}, "complete-year Cheshvan rejects 30 in regular year");
+
+TemporalHelpers.assertPlainDate(
+  clM02.with({ year: 5781 }),
+  5781, 2, "M02", 29, "complete-year Cheshvan constrains to 29 in deficient year",
+  "am", 5781);
+assert.throws(RangeError, function () {
+  clM02.with({ year: 5781 }, options);
+}, "complete-year Cheshvan rejects 30 in deficient year");
+
+TemporalHelpers.assertPlainDate(
+  clM03.with({ year: 5781 }),
+  5781, 3, "M03", 29, "complete-year Kislev constrains to 29 in deficient year",
+  "am", 5781);
+assert.throws(RangeError, function () {
+  clM03.with({ year: 5781 }, options);
+}, "complete-year Kislev rejects 30 in deficient year");
+
+// Months
+
+const dc0130 = Temporal.PlainDate.from({ year: 5781, monthCode: "M01", day: 30, calendar }, options);
+const rc0130 = Temporal.PlainDate.from({ year: 5778, monthCode: "M01", day: 30, calendar }, options);
+const cc0130 = Temporal.PlainDate.from({ year: 5783, monthCode: "M01", day: 30, calendar }, options);
+const dl0130 = Temporal.PlainDate.from({ year: 5784, monthCode: "M01", day: 30, calendar }, options);
+const rl0130 = Temporal.PlainDate.from({ year: 5782, monthCode: "M01", day: 30, calendar }, options);
+const cl0130 = Temporal.PlainDate.from({ year: 5779, monthCode: "M01", day: 30, calendar }, options);
+
+// Common year
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M02" }),
+  5778, 2, "M02", 29, "regular common year Cheshvan constrains to 29",
+  "am", 5778);
+assert.throws(RangeError, function () {
+  rc0130.with({ monthCode: "M02" }, options);
+}, "regular common year Cheshvan rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  cc0130.with({ monthCode: "M02" }),
+  5783, 2, "M02", 30, "regular common year Cheshvan does not reject 30",
+  "am", 5783);
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M03" }),
+  5778, 3, "M03", 30, "regular common year Kislev does not reject 30",
+  "am", 5778);
+
+TemporalHelpers.assertPlainDate(
+  dc0130.with({ monthCode: "M03" }),
+  5781, 3, "M03", 29, "deficient common year Kislev constrains to 29",
+  "am", 5781);
+assert.throws(RangeError, function () {
+  dc0130.with({ monthCode: "M03" }, options);
+}, "deficient common year Kislev rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M04" }),
+  5778, 4, "M04", 29, "common-year Tevet constrains to 29",
+  "am", 5778);
+assert.throws(RangeError, function () {
+  rc0130.with({ monthCode: "M04" }, options);
+}, "common-year Tevet rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M05" }),
+  5778, 5, "M05", 30, "common-year Shevat does not reject 30",
+  "am", 5778);
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M06" }),
+  5778, 6, "M06", 29, "common-year Adar constrains to 29",
+  "am", 5778);
+assert.throws(RangeError, function () {
+  rc0130.with({ monthCode: "M06" }, options);
+}, "common-year Adar rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M07" }),
+  5778, 7, "M07", 30, "common-year Nisan does not reject 30",
+  "am", 5778);
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M08" }),
+  5778, 8, "M08", 29, "common-year Iyar constrains to 29",
+  "am", 5778);
+assert.throws(RangeError, function () {
+  rc0130.with({ monthCode: "M08" }, options);
+}, "common-year Iyar rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M09" }),
+  5778, 9, "M09", 30, "common-year Sivan does not reject 30",
+  "am", 5778);
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M10" }),
+  5778, 10, "M10", 29, "common-year Tammuz constrains to 29",
+  "am", 5778);
+assert.throws(RangeError, function () {
+  rc0130.with({ monthCode: "M10" }, options);
+}, "common-year Tammuz rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M11" }),
+  5778, 11, "M11", 30, "common-year Av does not reject 30",
+  "am", 5778);
+
+TemporalHelpers.assertPlainDate(
+  rc0130.with({ monthCode: "M12" }),
+  5778, 12, "M12", 29, "common-year Elul constrains to 29",
+  "am", 5778);
+assert.throws(RangeError, function () {
+  rc0130.with({ monthCode: "M12" }, options);
+}, "common-year Elul rejects 30");
+
+// Leap year
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M02" }),
+  5782, 2, "M02", 29, "regular leap year Cheshvan constrains to 29",
+  "am", 5782);
+assert.throws(RangeError, function () {
+  rl0130.with({ monthCode: "M02" }, options);
+}, "regular leap year Cheshvan rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  cl0130.with({ monthCode: "M02" }),
+  5779, 2, "M02", 30, "regular leap year Cheshvan does not reject 30",
+  "am", 5779);
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M03" }),
+  5782, 3, "M03", 30, "regular leap year Kislev does not reject 30",
+  "am", 5782);
+
+TemporalHelpers.assertPlainDate(
+  dl0130.with({ monthCode: "M03" }),
+  5784, 3, "M03", 29, "deficient leap year Kislev constrains to 29",
+  "am", 5784);
+assert.throws(RangeError, function () {
+  dl0130.with({ monthCode: "M03" }, options);
+}, "deficient leap year Kislev rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M04" }),
+  5782, 4, "M04", 29, "leap-year Tevet constrains to 29",
+  "am", 5782);
+assert.throws(RangeError, function () {
+  rl0130.with({ monthCode: "M04" }, options);
+}, "leap-year Tevet rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M05" }),
+  5782, 5, "M05", 30, "leap-year Shevat does not reject 30",
+  "am", 5782);
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M05L" }),
+  5782, 6, "M05L", 30, "leap-year Adar I does not reject 30",
+  "am", 5782);
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M06" }),
+  5782, 7, "M06", 29, "leap-year Adar II constrains to 29",
+  "am", 5782);
+assert.throws(RangeError, function () {
+  rl0130.with({ monthCode: "M06" }, options);
+}, "leap-year Adar II rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M07" }),
+  5782, 8, "M07", 30, "leap-year Nisan does not reject 30",
+  "am", 5782);
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M08" }),
+  5782, 9, "M08", 29, "leap-year Iyar constrains to 29",
+  "am", 5782);
+assert.throws(RangeError, function () {
+  rl0130.with({ monthCode: "M08" }, options);
+}, "leap-year Iyar rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M09" }),
+  5782, 10, "M09", 30, "leap-year Sivan does not reject 30",
+  "am", 5782);
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M10" }),
+  5782, 11, "M10", 29, "leap-year Tammuz constrains to 29",
+  "am", 5782);
+assert.throws(RangeError, function () {
+  rl0130.with({ monthCode: "M10" }, options);
+}, "leap-year Tammuz rejects 30");
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M11" }),
+  5782, 12, "M11", 30, "leap-year Av does not reject 30",
+  "am", 5782);
+
+TemporalHelpers.assertPlainDate(
+  rl0130.with({ monthCode: "M12" }),
+  5782, 13, "M12", 29, "leap-year Elul constrains to 29",
+  "am", 5782);
+assert.throws(RangeError, function () {
+  rl0130.with({ monthCode: "M12" }, options);
+}, "leap-year Elul rejects 30");