Support for JSON merge-patch

It looks like super agent doesn’t support JSON merge-patches with Content-Type: application/merge-patch+json. When I try to send(...) a JSON value it comes out on the other side empty:

    const req = request(app)
        .patch(url)
        .set("Content-Type", "application/merge-patch+json")
        .send(entity);
        .expect('Content-Type', /json/)
        .expect(200);

To reiterate, on the server side, req.body is actually empty.

I haven’t looked at the code but if I had to guess I’d gues sthat send(..) is doing some conversion stuff depending on what Content-Type is set to, which makes sense, but it would be nice in general if I could turn it off, or specify what the body is concretely to avoid this problem.

[deiga]

@t3hmrman I started a PR to address this, but I can’t get a test to reproduce the issue. Could you check if the test I wrote is wrong somehow? https://github.com/visionmedia/superagent/pull/1441

[t3hmrman]

Just found out it’s a bug feature in body-parser from a ticket in 2015.

My apologies @deiga thanks for looking at this