era-boundary-roc.js

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// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally

// 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.from

description: Non-positive era years are remapped in roc calendar

includes: [temporalHelpers.js]

features: [Temporal, Intl.Era-monthcode]

---*/

const calendar = "roc";

const options = { overflow: "reject" };

const roc0 = Temporal.PlainYearMonth.from({ era: "roc", eraYear: 0, monthCode: "M01", calendar }, options);

TemporalHelpers.assertPlainYearMonth(

  roc0,

  0, 1, "M01", "ROC 0 resolves to BROC 1",

  "broc", 1);

const roc1n = Temporal.PlainYearMonth.from({ era: "roc", eraYear: -1, monthCode: "M01", calendar }, options);

TemporalHelpers.assertPlainYearMonth(

  roc1n,

  -1, 1, "M01", "ROC -1 resolves to BROC 2",

  "broc", 2);

const broc0 = Temporal.PlainYearMonth.from({ era: "broc", eraYear: 0, monthCode: "M01", calendar }, options);

TemporalHelpers.assertPlainYearMonth(

  broc0,

  1, 1, "M01", "BROC 0 resolves to ROC 1",

  "roc", 1);

const broc1n = Temporal.PlainYearMonth.from({ era: "broc", eraYear: -1, monthCode: "M01", calendar }, options);

TemporalHelpers.assertPlainYearMonth(

  broc1n,

  2, 1, "M01", "BROC -1 resolves to ROC 2",

  "roc", 2);

reportCompare(0, 0);