126 lines
3.7 KiB
TypeScript
126 lines
3.7 KiB
TypeScript
import {
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getMessage,
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fetchLocale,
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FALLBACK_LOCALE,
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} from '../../shared/modules/i18n';
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import { t, updateCurrentLocale } from './translate';
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const localeCodeMock = 'te';
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const keyMock = 'testKey';
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const substitutionsMock = ['a1', 'b2'];
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const messageMock = 'testMessage';
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const messageMock2 = 'testMessage2';
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const alternateLocaleDataMock = { [keyMock]: { message: messageMock2 } };
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jest.mock('../../shared/modules/i18n');
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jest.mock('../_locales/en/messages.json', () => ({
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[keyMock]: { message: messageMock },
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}));
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describe('Translate', () => {
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const getMessageMock = getMessage as jest.MockedFunction<typeof getMessage>;
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const fetchLocaleMock = fetchLocale as jest.MockedFunction<
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typeof fetchLocale
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>;
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beforeEach(async () => {
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jest.resetAllMocks();
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await updateCurrentLocale(FALLBACK_LOCALE);
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});
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describe('updateCurrentLocale', () => {
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it('retrieves locale data from shared module', async () => {
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await updateCurrentLocale(localeCodeMock);
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expect(fetchLocale).toHaveBeenCalledTimes(1);
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expect(fetchLocale).toHaveBeenCalledWith(localeCodeMock);
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});
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it('does not retrieve locale data if same locale already set', async () => {
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await updateCurrentLocale(localeCodeMock);
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await updateCurrentLocale(localeCodeMock);
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expect(fetchLocale).toHaveBeenCalledTimes(1);
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expect(fetchLocale).toHaveBeenCalledWith(localeCodeMock);
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});
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it('does not retrieve locale data if fallback locale set', async () => {
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await updateCurrentLocale(localeCodeMock);
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await updateCurrentLocale(FALLBACK_LOCALE);
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expect(fetchLocale).toHaveBeenCalledTimes(1);
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expect(fetchLocale).toHaveBeenCalledWith(localeCodeMock);
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});
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});
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describe('t', () => {
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it('returns value from shared module', () => {
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getMessageMock.mockReturnValue(messageMock);
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expect(t(keyMock, ...substitutionsMock)).toStrictEqual(messageMock);
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});
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it('uses en locale by default', () => {
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getMessageMock.mockReturnValue(messageMock);
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t(keyMock, ...substitutionsMock);
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expect(getMessage).toHaveBeenCalledTimes(1);
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expect(getMessage).toHaveBeenCalledWith(
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FALLBACK_LOCALE,
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{ [keyMock]: { message: messageMock } },
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keyMock,
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substitutionsMock,
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);
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});
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it('uses locale passed to updateCurrentLocale if called', async () => {
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(getMessage as jest.MockedFunction<typeof getMessage>).mockReturnValue(
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messageMock,
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);
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fetchLocaleMock.mockResolvedValueOnce(alternateLocaleDataMock);
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await updateCurrentLocale(localeCodeMock);
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t(keyMock, ...substitutionsMock);
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expect(getMessage).toHaveBeenCalledTimes(1);
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expect(getMessage).toHaveBeenCalledWith(
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localeCodeMock,
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alternateLocaleDataMock,
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keyMock,
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substitutionsMock,
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);
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});
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it('returns value from en locale as fallback if current locale returns null', async () => {
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(
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getMessage as jest.MockedFunction<typeof getMessage>
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).mockReturnValueOnce(null);
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(
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getMessage as jest.MockedFunction<typeof getMessage>
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).mockReturnValueOnce(messageMock2);
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fetchLocaleMock.mockResolvedValueOnce(alternateLocaleDataMock);
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await updateCurrentLocale(localeCodeMock);
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expect(t(keyMock, ...substitutionsMock)).toStrictEqual(messageMock2);
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expect(getMessage).toHaveBeenCalledTimes(2);
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expect(getMessage).toHaveBeenCalledWith(
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FALLBACK_LOCALE,
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{ [keyMock]: { message: messageMock } },
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keyMock,
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substitutionsMock,
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);
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expect(getMessage).toHaveBeenCalledWith(
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localeCodeMock,
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alternateLocaleDataMock,
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keyMock,
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substitutionsMock,
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);
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});
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});
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});
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