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react-code-dataset / next.js /packages /next /src /server /lib /i18n-provider.test.ts
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import type { DomainLocale } from '../config'
import { I18NProvider } from './i18n-provider'
import type { LocaleAnalysisResult } from './i18n-provider'
describe('I18NProvider', () => {
const config = {
defaultLocale: 'en',
locales: ['en', 'fr', 'en-CA'],
domains: [
{
domain: 'example.com',
defaultLocale: 'en',
locales: ['en-CA'],
},
{
domain: 'example.fr',
defaultLocale: 'fr',
},
],
}
const provider = new I18NProvider(config)
describe('detectDomainLocale', () => {
it.each<{
domain: string | undefined
detectedLocale: string | undefined
expected: DomainLocale | undefined
}>([
// Verify domains.
...config.domains.map((domainLocale) => ({
domain: domainLocale.domain,
detectedLocale: undefined,
expected: domainLocale,
})),
// Verify not-found domains.
{
domain: 'example.de',
detectedLocale: undefined,
expected: undefined,
},
// Verify that the other detected locale will support the domain.
{
domain: 'example.ca',
detectedLocale: 'en-CA',
expected: config.domains.find((domainLocale) =>
domainLocale.locales?.includes('en-CA')
),
},
])('for domain $domain', ({ domain, detectedLocale, expected }) => {
expect(provider.detectDomainLocale(domain, detectedLocale)).toEqual(
expected
)
})
})
it('should detect the correct domain locale', () => {
expect(provider.detectDomainLocale('example.com')).toEqual({
domain: 'example.com',
defaultLocale: 'en',
locales: ['en-CA'],
})
expect(provider.detectDomainLocale('example.fr')).toEqual({
domain: 'example.fr',
defaultLocale: 'fr',
})
expect(provider.detectDomainLocale('example.de')).toBeUndefined()
})
describe('analyze', () => {
it.each<{
pathname: string
defaultLocale: string | undefined
expected: LocaleAnalysisResult
}>([
// Verify un-prefixed index routes.
{
pathname: '/',
defaultLocale: config.defaultLocale,
expected: {
pathname: '/',
detectedLocale: config.defaultLocale,
inferredFromDefault: true,
},
},
// Verify un-prefixed other routes.
{
pathname: '/another/page',
defaultLocale: config.defaultLocale,
expected: {
pathname: '/another/page',
detectedLocale: config.defaultLocale,
inferredFromDefault: true,
},
},
// Verify locale prefixed index routes.
...config.locales.map((locale) => ({
pathname: `/${locale}`,
defaultLocale: config.defaultLocale,
expected: {
pathname: '/',
detectedLocale: locale,
inferredFromDefault: false,
},
})),
// Verify locale prefixed other routes.
...config.locales.map((locale) => ({
pathname: `/${locale}/another/page`,
defaultLocale: config.defaultLocale,
expected: {
pathname: '/another/page',
detectedLocale: locale,
inferredFromDefault: false,
},
})),
])(
'for pathname $pathname and defaultLocale $defaultLocale',
({ pathname, defaultLocale, expected }) => {
expect(provider.analyze(pathname, { defaultLocale })).toEqual(expected)
}
)
})
})