Failing `writeToFile` if the request body is used

[nagytom]

Software versions

• OS: macOS 14.4.1
• Pact Node version: "@pactflow/pact-msw-adapter": "3.0.0"
• Node Version: 20.12.1

Issue Checklist

Please confirm the following:

• [x] I have upgraded to the latest
• [x] I have the read the FAQs in the Readme
• [x] I have triple checked, that there are no unhandled promises in my code
• [ ] I have set my log level to debug and attached a log file showing the complete request/response cycle
• [ ] For bonus points and virtual high fives, I have created a reproduceable git repository (see below) to illustrate the problem

Expected behavior

The request body should be consumable in the MSW handler without causing writeToFile to fail.

Actual behavior

writeToFile fails because it tries to clone the request and read the body which is already consumed (src).

This is not allowed by the specs (MDN):

clone() throws a TypeError if the request body has already been used.

Steps to reproduce

test('echo', async () => {
  server.use(
    http.post('*/echo', async ({ request }) => {
      const body = await request.json();
      return HttpResponse.json(body);
    })
  );

  let response = await fetch('http://localhost/echo', {
    body: JSON.stringify({ test: 'data' }),
    method: 'POST',
    headers: { 'content-type': 'application/json' },
  });
  let body = await response.json();

  expect(body).toEqual({ test: 'data' });
});

Relevant log files

-

[daniel-meneses]

Temporary workaround:

http.post('*/echo', async ({ request }) => {
    const body = await request.clone().json();
    return HttpResponse.json(body);
})

[YOU54F]

Happy to accept pull requests to sort, sorry for late reply