import { cachedFetchText } from './fetch'; global.console = { ...console, error: jest.fn(), info: jest.fn(), }; const mockedFetch = jest.fn(); jest.mock('make-fetch-happen', () => ({ __esModule: true, default: { defaults: () => mockedFetch, }, })); describe('fetch', () => { test('cachedFetchText throws if the response is not OK', async () => { mockedFetch.mockResolvedValue({ ok: false, status: 500, statusText: 'some error happened' }); await expect(cachedFetchText('https://some-url.test')).rejects.toThrow(new Error('HTTP error: 500 - some error happened')); }); test('cachedFetchText passes response through if it is OK', async () => { mockedFetch.mockResolvedValue({ ok: true, text: () => Promise.resolve('some text') }); const responseText = await cachedFetchText('https://some-url.test'); expect(responseText).toBe('some text'); }); });