File Content: constants.test.ts import { uniqBy } from 'lodash'; import { LANGUAGES, VALID_LANGUAGES } from './constants'; describe('internationalization constants', () => { it('should not have duplicate languages codes', () => { const uniqLocales = uniqBy(LANGUAGES, (v) => v.code); expect(LANGUAGES).toHaveLength(uniqLocales.length); }); it('should have a correct list of valid locale codes', () => { expect(VALID_LANGUAGES).toEqual(LANGUAGES.map((v) => v.code)); }); }); Submit