mock-fetch-jest.js

describe('test', () => {
  const mockFetchPromise = () =>
    Promise.resolve({
      ok: true,
      json: () => Promise.resolve({}),
      status: 200,
      statusText: 'OK'
    });

  beforeEach(() => {
    // global.fetch = jest.fn().mockImplementation(() => mockFetchPromise());
    jest.spyOn(global, 'fetch').mockImplementation((url, options) => {
      console.log({ url, options });
      return mockFetchPromise();
    });
  });

  it('…', async () => {
  });
});