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Unit test for locale-match
Tests are copied from original sources
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src/utils/mem.js
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src/utils/mem.js
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tests/locale-match.spec.js
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tests/locale-match.spec.js
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// @ts-check
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import { test, expect } from '@playwright/test';
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import localeMatch from '../src/utils/locale-match.js';
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// https://github.com/formatjs/formatjs/blob/e11b9b57a5ed745584b169c13b0a1812ba9e6051/packages/intl-localematcher/tests/index.test.ts
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test.describe('official formatjs test cases', () => {
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test('zh-HK', () => {
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expect(localeMatch(['zh-HK'], ['zh', 'zh-HANT', 'en'], 'en')).toBe(
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'zh-HANT',
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);
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});
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test('Intl.LocaleMatcher - fr-XX fallback', () => {
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expect(localeMatch(['fr-XX', 'en'], ['fr', 'en'], 'en')).toBe('fr');
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});
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test('Intl.LocaleMatcher - zh-TW to zh-Hant-TW', () => {
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expect(localeMatch(['zh-TW', 'en'], ['zh-Hant-TW', 'en'], 'en')).toBe(
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'zh-Hant-TW',
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);
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});
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test('Intl.LocaleMatcher - sr-Latn-BA complex matching', () => {
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expect(
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localeMatch(
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['sr-Latn-BA'],
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[
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'af',
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'ak',
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'am',
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'an',
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'ar',
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'ars',
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'as',
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'asa',
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'ast',
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'az',
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'be',
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'bem',
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'bez',
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'bg',
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'bho',
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'bm',
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'bn',
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'bo',
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'br',
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'brx',
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'bs',
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'ca',
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'ce',
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'ceb',
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'cgg',
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'chr',
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'ckb',
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'cs',
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'cy',
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'da',
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'de',
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'doi',
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'dsb',
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'dv',
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'dz',
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'ee',
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'el',
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'en',
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'eo',
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'es',
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'et',
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'eu',
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'fa',
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'ff',
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'fi',
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'fil',
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'fo',
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'fr',
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'fur',
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'fy',
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'ga',
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'gd',
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'gl',
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'gsw',
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'gu',
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'guw',
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'gv',
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'ha',
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'haw',
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'he',
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'ksb',
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'ksh',
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'ku',
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'kw',
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'ky',
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'lag',
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'lb',
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'lg',
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'lij',
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'lkt',
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'ln',
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'lo',
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'lt',
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'lv',
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'mas',
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'mg',
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'mgo',
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'mk',
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'ml',
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'mn',
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'mo',
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'mr',
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'ms',
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'mt',
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'my',
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'nah',
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'naq',
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'nb',
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'nd',
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'ne',
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'nl',
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'nn',
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'nnh',
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'no',
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'nqo',
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'nr',
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'nso',
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'ny',
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'nyn',
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'om',
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'or',
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'os',
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'osa',
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'pa',
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'pap',
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'pcm',
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'pl',
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'prg',
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'ps',
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'pt-PT',
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'pt',
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'rm',
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'ro',
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'rof',
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'ru',
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'rwk',
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'sah',
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'saq',
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'sat',
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'sc',
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'scn',
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'sd',
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'sdh',
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'se',
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'seh',
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'ses',
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'sg',
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'sh',
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'shi',
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'si',
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'sk',
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'sl',
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'sma',
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'smi',
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'smj',
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'smn',
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'sms',
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'sn',
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'so',
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'sq',
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'sr',
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'ss',
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'ssy',
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'st',
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'su',
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'sv',
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'sw',
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'syr',
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'ta',
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'te',
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'teo',
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'th',
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'ti',
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'tig',
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'tk',
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'tl',
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'tn',
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'to',
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'tr',
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'ts',
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'tzm',
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'ug',
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'uk',
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'ur',
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'uz',
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've',
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'vi',
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'vo',
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'vun',
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'wa',
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'wae',
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'wo',
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'xh',
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'xog',
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'yi',
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'yo',
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'yue',
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'zh',
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'zu',
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],
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'en',
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),
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).toBe('sh');
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});
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test('empty requested', () => {
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expect(localeMatch([], ['zh-Hant-TW', 'en'], 'en')).toBe('en');
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});
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test('extension', () => {
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expect(localeMatch(['fr-CA-x-foo'], ['zh-Hant-TW', 'fr', 'en'], 'en')).toBe(
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'fr',
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);
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});
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test('GH #4267', () => {
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expect(localeMatch(['fr'], ['br', 'fr'], 'en')).toBe('fr');
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});
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});
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// https://github.com/formatjs/formatjs/blob/e11b9b57a5ed745584b169c13b0a1812ba9e6051/packages/intl-localematcher/tests/BestFitMatcher.test.ts
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test.describe('BestFitMatcher test cases', () => {
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test('BestFitMatcher basic', () => {
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expect(localeMatch(['fr-XX', 'en'], ['fr', 'en'], 'en')).toBe('fr');
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});
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test('BestFitMatcher zh-TW', () => {
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expect(localeMatch(['zh-TW'], ['zh', 'zh-Hant'], 'en')).toBe('zh-Hant');
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});
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test('BestFitMatcher en', () => {
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expect(localeMatch(['en'], ['en', 'und'], 'en')).toBe('en');
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});
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test('BestFitMatcher extension', () => {
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// Extensions should be handled transparently by the underlying matcher
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expect(localeMatch(['th-u-ca-gregory'], ['th'], 'en')).toBe('th');
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});
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test('GH #4272 - fallback behavior', () => {
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expect(localeMatch(['es'], ['fr', 'en'], 'en')).toBe('en');
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expect(localeMatch(['es'], ['en', 'fr', 'en'], 'fr')).toBe('fr');
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});
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test('GH #4258 - best fit matching', () => {
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expect(
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localeMatch(['de-DE', 'fr'], ['en', 'en-US', 'fr-FR'], 'en-US'),
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).toBe('fr-FR');
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});
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test('GH #4237 - exact locale preference', () => {
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expect(
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localeMatch(['en-GB', 'en-US', 'en'], ['en-US', 'nl-NL', 'nl'], 'en-US'),
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).toBe('en-US');
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});
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test('bestFitMatcher testing zh-HK', () => {
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expect(localeMatch(['zh-HK'], ['zh-Hant', 'zh-MO'], 'en')).toBe('zh-MO');
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});
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test('bestFitMatcher testing en-CA', () => {
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expect(localeMatch(['en-CA'], ['en-GB', 'en-US'], 'en-US')).toBe('en-US');
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});
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test('bestFitMatcher testing es-KY Americas', () => {
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expect(localeMatch(['es-KY'], ['es', 'en', 'es-419'], 'en')).toBe('es-419');
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});
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});