import { getUserLocales } from 'get-user-locale';

import { getMatchingLocale } from './utils';

jest.mock('lodash.once', () => (fn) => fn);

jest.mock('get-user-locale', () => ({
  getUserLocales: jest.fn(),
}));

describe('getMatchingLocale()', () => {
  it.each`
    userLocales           | supportedLocales       | expectedResult
    ${['pl', 'en']}       | ${['pl', 'en']}        | ${'pl'}
    ${['pl', 'en']}       | ${['en', 'pl']}        | ${'pl'}
    ${['pl-PL', 'en']}    | ${['pl', 'en']}        | ${'pl'}
    ${['de', 'en']}       | ${['pl', 'en']}        | ${'en'}
    ${['de-DE', 'en']}    | ${['pl', 'en']}        | ${'en'}
    ${['en-US', 'pl']}    | ${['pl', 'en']}        | ${'en'}
    ${['en-US', 'pl-PL']} | ${['pl', 'en']}        | ${'en'}
    ${['pl', 'en']}       | ${['pl-PL', 'en-US']}  | ${'pl-PL'}
    ${['pl', 'en']}       | ${['en-US', 'pl-PL']}  | ${'pl-PL'}
    ${['pl-PL', 'en']}    | ${['pl-PL', 'en-US']}  | ${'pl-PL'}
    ${['de', 'en']}       | ${['pl-PL', 'en-US']}  | ${'en-US'}
    ${['de-DE', 'en']}    | ${['pl-PL', 'en-US']}  | ${'en-US'}
    ${['en-US', 'pl']}    | ${['pl-PL', 'en-US']}  | ${'en-US'}
    ${['en-US', 'pl-PL']} | ${['pl-PL', 'en-US']}  | ${'en-US'}
  `('returns $expectedResult for userLocales = $userLocales and supportedLocales = $supportedLocales', ({ userLocales, supportedLocales, expectedResult }) => {
    getUserLocales.mockReturnValueOnce(userLocales);

    const result = getMatchingLocale(supportedLocales);

    expect(result).toBe(expectedResult);
  });
});