Unintuitive Set-Cookie behavior

const request = require('supertest');

const app = require('express')()
  .get('/cookies', (req, res, next) => {
    res.cookie('one', '1');
    res.cookie('two', '2');
    res.json(res._headers['set-cookie']);
  });

describe('/cookies', () => {
  it('should have correct anatomy', () =>
    request.agent(app)
      .get('/cookies')
      .expect(200, ['one=1; Path=/', 'two=2; Path=/']) // This is what I expect below
      .then(res => {
        expect(res.headers['set-cookie'].length).toBe(1); // should be 2
        expect(res.headers['set-cookie']).toEqual(['one=1; Path=/,two=2; Path=/']); // why is this a single string?
      })
  );
});

No?

[jaygood]

Oh that is odd. I just tried with mocha and am getting

[ 'one=1; Path=/', 'two=2; Path=/' ]

whereas jest is getting

[ 'one=1; Path=/,two=2; Path=/' ]

I’ll have to dig into what they’re doing…

Thanks

[jbinto]

👍, looks like I’m hitting this exact issue too. Also running jest.

For people coming here via google, here is a workaround: https://github.com/facebook/jest/issues/3547#issuecomment-302550427