Mock GQL responses with Jest?

[ztamas83]

I don't seem to get this working. Has anyone succeeded?

    const spy = jest.spyOn(global, 'fetch').mockImplementation(
        jest.fn(() =>
            Promise.resolve({
                json: () => Promise.resolve(anyResponseObject),
                ok: true
            })
        ) as jest.Mock
    );

Then I create the GraphQLClient and try to do a request. I expect that to be intercepted by Jest, but it doesn't happen. This solution works with other fetch based code. I wonder if there's a trick or just doesn't work?

I can spy on the GraphQLClient.request but then I cannot test the behavior from my custom middleware.