102 lines
4.0 KiB
TypeScript
102 lines
4.0 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import {describe, expect, it} from 'vitest';
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import {Locales} from '~/Constants';
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import {parseAcceptLanguage} from './LocaleUtils';
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describe('LocaleUtils', () => {
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describe('parseAcceptLanguage', () => {
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it('should return en-US when header is null', () => {
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expect(parseAcceptLanguage(null)).toBe(Locales.EN_US);
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});
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it('should return en-US when header is undefined', () => {
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expect(parseAcceptLanguage(undefined)).toBe(Locales.EN_US);
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});
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it('should return en-US when header is empty', () => {
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expect(parseAcceptLanguage('')).toBe(Locales.EN_US);
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});
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it('should return exact match for supported locale', () => {
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expect(parseAcceptLanguage('fr')).toBe(Locales.FR);
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expect(parseAcceptLanguage('de')).toBe(Locales.DE);
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expect(parseAcceptLanguage('ja')).toBe(Locales.JA);
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});
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it('should return exact match for supported locale with region', () => {
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expect(parseAcceptLanguage('en-US')).toBe(Locales.EN_US);
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expect(parseAcceptLanguage('en-GB')).toBe(Locales.EN_GB);
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expect(parseAcceptLanguage('pt-BR')).toBe(Locales.PT_BR);
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expect(parseAcceptLanguage('es-ES')).toBe(Locales.ES_ES);
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});
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it('should handle quality values correctly', () => {
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expect(parseAcceptLanguage('en;q=0.8,fr;q=0.9')).toBe(Locales.FR);
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expect(parseAcceptLanguage('de;q=0.5,ja;q=0.9,en-US;q=0.3')).toBe(Locales.JA);
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});
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it('should handle complex Accept-Language headers', () => {
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expect(parseAcceptLanguage('fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7')).toBe(Locales.FR);
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expect(parseAcceptLanguage('de-DE,de;q=0.9,en;q=0.8')).toBe(Locales.DE);
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});
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it('should match language code when exact locale not found', () => {
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expect(parseAcceptLanguage('en')).toBe(Locales.EN_US);
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expect(parseAcceptLanguage('es')).toBe(Locales.ES_ES);
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expect(parseAcceptLanguage('pt')).toBe(Locales.PT_BR);
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expect(parseAcceptLanguage('zh')).toBe(Locales.ZH_CN);
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});
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it('should fallback to en-US for unsupported locales', () => {
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expect(parseAcceptLanguage('xx-XX')).toBe(Locales.EN_US);
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expect(parseAcceptLanguage('invalid')).toBe(Locales.EN_US);
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expect(parseAcceptLanguage('unsupported-locale')).toBe(Locales.EN_US);
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});
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it('should handle malformed headers gracefully', () => {
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expect(parseAcceptLanguage(';;;')).toBe(Locales.EN_US);
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expect(parseAcceptLanguage('q=0.9')).toBe(Locales.EN_US);
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});
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it('should prioritize first exact match when multiple supported locales exist', () => {
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expect(parseAcceptLanguage('ja,fr,de')).toBe(Locales.JA);
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expect(parseAcceptLanguage('en-GB,en-US')).toBe(Locales.EN_GB);
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});
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it('should handle whitespace correctly', () => {
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expect(parseAcceptLanguage(' fr ')).toBe(Locales.FR);
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expect(parseAcceptLanguage('en-US , fr ; q=0.8')).toBe(Locales.EN_US);
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});
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it('should respect quality values over order', () => {
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expect(parseAcceptLanguage('en-US;q=0.5,fr;q=1.0')).toBe(Locales.FR);
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expect(parseAcceptLanguage('de;q=0.3,ja;q=0.9,en-GB;q=0.7')).toBe(Locales.JA);
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});
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it('should handle case insensitivity for language codes', () => {
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expect(parseAcceptLanguage('EN-us')).toBe(Locales.EN_US);
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expect(parseAcceptLanguage('FR')).toBe(Locales.FR);
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expect(parseAcceptLanguage('EN-gb')).toBe(Locales.EN_GB);
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expect(parseAcceptLanguage('pt-br')).toBe(Locales.PT_BR);
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});
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});
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});
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