83 lines
2.3 KiB
TypeScript
83 lines
2.3 KiB
TypeScript
import type { i18n as I18nInstance } from 'i18next'
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import { beforeEach, describe, expect, it, vi } from 'vitest'
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import { PlausibleEvents } from '../services/analytics.js'
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import {
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changeAppLanguage,
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cycleAppLanguage,
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getNextLanguage,
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normalizeAppLanguage,
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SUPPORTED_LANGUAGES
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} from './i18nLanguages.js'
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const trackPlausibleEvent = vi.fn()
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vi.mock('../services/analytics.js', async (importOriginal) => {
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const actual = await importOriginal<typeof import('../services/analytics.js')>()
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return {
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...actual,
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trackPlausibleEvent: (...args: unknown[]) => trackPlausibleEvent(...args)
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}
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})
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function createMockI18n(language: string): I18nInstance {
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const mock = {
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language,
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changeLanguage: vi.fn(async (lng: string) => {
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mock.language = lng
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})
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} as unknown as I18nInstance
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return mock
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}
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describe('i18nLanguages', () => {
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beforeEach(() => {
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trackPlausibleEvent.mockReset()
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})
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it('normalizes regional tags to supported base codes', () => {
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expect(normalizeAppLanguage('de-DE')).toBe('de')
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expect(normalizeAppLanguage('nb-NO')).toBe('nb')
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expect(normalizeAppLanguage('xx')).toBe('en')
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})
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it('cycles through all supported languages', () => {
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let current: string = 'de'
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const seen = new Set<string>()
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for (let i = 0; i < SUPPORTED_LANGUAGES.length; i++) {
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seen.add(current)
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current = getNextLanguage(current)
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}
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expect(seen.size).toBe(SUPPORTED_LANGUAGES.length)
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expect(current).toBe('de')
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})
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it('tracks explicit language changes', () => {
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const i18n = createMockI18n('de')
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changeAppLanguage(i18n, 'sv')
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expect(i18n.changeLanguage).toHaveBeenCalledWith('sv')
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expect(trackPlausibleEvent).toHaveBeenCalledWith(PlausibleEvents.LANGUAGE_CHANGED, {
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from: 'de',
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to: 'sv'
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})
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})
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it('does not track when language stays the same', () => {
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const i18n = createMockI18n('en')
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changeAppLanguage(i18n, 'en')
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expect(i18n.changeLanguage).not.toHaveBeenCalled()
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expect(trackPlausibleEvent).not.toHaveBeenCalled()
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})
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it('cycleAppLanguage tracks the next language', () => {
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const i18n = createMockI18n('es')
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cycleAppLanguage(i18n)
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expect(trackPlausibleEvent).toHaveBeenCalledWith(PlausibleEvents.LANGUAGE_CHANGED, {
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from: 'es',
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to: 'de'
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})
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})
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})
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