JSTests/test262/test/intl402/Locale/constructor-locale-object.js

// Copyright 2018 André Bargull; Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-intl.locale
description: >
    Verifies canonicalization of specific tags.
info: |
    ApplyOptionsToTag( tag, options )
    10. Return CanonicalizeLanguageTag(tag).
features: [Intl.Locale]
---*/

// Pass Intl.Locale object and replace subtag.
const enUS = new Intl.Locale("en-US");
const enGB = new Intl.Locale(enUS, {region: "GB"});

assert.sameValue(enUS.toString(), "en-US", 'enUS.toString() returns "en-US"');
assert.sameValue(enGB.toString(), "en-GB", 'enGB.toString() returns "en-GB"');

// Pass Intl.Locale object and replace Unicode extension keyword.
const zhUnihan = new Intl.Locale("zh-u-co-unihan");
const zhZhuyin = new Intl.Locale(zhUnihan, {collation: "zhuyin"});

assert.sameValue(
  zhUnihan.toString(),
  "zh-u-co-unihan",
  'zhUnihan.toString() returns "zh-u-co-unihan"'
);
assert.sameValue(
  zhZhuyin.toString(),
  "zh-u-co-zhuyin",
  'zhZhuyin.toString() returns "zh-u-co-zhuyin"'
);

assert.sameValue(zhUnihan.collation, "unihan", 'The value of zhUnihan.collation is "unihan"');
assert.sameValue(zhZhuyin.collation, "zhuyin", 'The value of zhZhuyin.collation is "zhuyin"');