| import { acceptLanguage } from 'next/dist/server/accept-header' |
|
|
| describe('acceptLanguage', () => { |
| it('parses the header', () => { |
| const language = acceptLanguage('da, en-GB, en') |
| expect(language).toEqual('da') |
| }) |
|
|
| it('respects weights', () => { |
| const language = acceptLanguage('en;q=0.6, en-GB;q=0.8') |
| expect(language).toEqual('en-gb') |
| }) |
|
|
| it('returns an empty string with header is empty', () => { |
| const language = acceptLanguage('') |
| expect(language).toEqual('') |
| }) |
|
|
| it('returns empty string if header is missing', () => { |
| const language = acceptLanguage() |
| expect(language).toEqual('') |
| }) |
|
|
| it('ignores an empty preferences array', () => { |
| const language = acceptLanguage('da, en-GB, en', []) |
| expect(language).toEqual('da') |
| }) |
|
|
| it('returns empty string if none of the preferences match', () => { |
| const language = acceptLanguage('da, en-GB, en', ['es']) |
| expect(language).toEqual('') |
| }) |
|
|
| it('returns first preference if header has * and is unmatched', () => { |
| const language = acceptLanguage('da, en-GB, *', ['en-US']) |
| expect(language).toEqual('en-US') |
| }) |
|
|
| it('returns first found preference that header includes', () => { |
| const language = acceptLanguage('da, en-GB, en', ['en-US', 'en-GB']) |
| expect(language).toEqual('en-US') |
| }) |
|
|
| it('returns preference with highest order when equal weigths', () => { |
| expect(acceptLanguage('da, en, en-GB', ['en', 'en-GB'])).toEqual('en') |
| expect(acceptLanguage('da, en, en-GB', ['en-GB', 'en'])).toEqual('en-GB') |
| expect(acceptLanguage('en, en-GB, en-US')).toEqual('en') |
| }) |
|
|
| it('return language with heighest weight', () => { |
| const language = acceptLanguage('da;q=0.5, en;q=1', ['da', 'en']) |
| expect(language).toEqual('en') |
| }) |
|
|
| it('ignores preference case when matching', () => { |
| const language = acceptLanguage('da, en-GB, en-us', ['en-gb', 'en-us']) |
| expect(language).toEqual('en-gb') |
| }) |
|
|
| it('returns language using range match', () => { |
| expect(acceptLanguage('da', ['da-DK'])).toEqual('da-DK') |
| expect(acceptLanguage('en-US, en', ['en-GB', 'en-US'])).toEqual('en-GB') |
| expect(acceptLanguage('da, en', ['da-DK', 'en-GB'])).toEqual('da-DK') |
| expect(acceptLanguage('en, da', ['da-DK', 'en-GB'])).toEqual('da-DK') |
| expect(acceptLanguage('en, da', ['en', 'en-GB'])).toEqual('en') |
| expect(acceptLanguage('da, en-GB', ['da-DK', 'en-GB'])).toEqual('da-DK') |
| expect(acceptLanguage('en, en-GB', ['en-US', 'en-GB', 'da-DK'])).toEqual( |
| 'en-US' |
| ) |
| }) |
|
|
| it('explicit preference overrides range match', () => { |
| expect(acceptLanguage('da, en-GB', ['da-DK', 'en-GB', 'da'])).toEqual( |
| 'en-GB' |
| ) |
| }) |
| }) |
|
|
