Problem

Cookies in happy-dom/jsdom virtual DOM are not set based on set-cookie response header.

Context

I’m testing my API with Vitest and happy-dom.

First of all I fetch POST /api/auth/login endpoint and I get response with set-cookie header
Then I fetch POST /api/auth/logout where Authorization cookie should be sent.

1. POST /api/auth/login

const response = await fetch('http://localhost:3000/' + 'api/auth/login', {
      method: 'POST',
      credentials: 'include',
      headers: {
         Accept: 'application/json',
         'Content-Type': 'application/json'
      },
      body: JSON.stringify({ code: sendEmailTextContent, email: generatedOwnerEmail })
});

2. response.getSetCookie() method return value

 [
  'Authentification=eyJhbGdcCI6IkpXVCJ9.eyJpsasgdZCI6IjdjMGRhYTAwLThiNjEtNDc1NS05ZjQ2LWY4NTQ3NmM1ODVkZSIsImlhdCI6MTcyNjYwMDY4MywiZXhwIjoxNzI2Njg3MDgzfQ; Max-Age=21600; Path=/',
  'Refresh=5sdfsdfsassdf.IjdjMGRhYTAwLThiNjEtNDc1NS05ZjQ2LWY4NTQ3NmM1ODVkZSIsImlhdCI6MTcyNjYwMDY4M30.ssdsAsf3d3gsasdfas44tscvvsg; Max-Age=604800000; Path=/api/auth/refresh-token'
 ]

API responds with proper cookies.

3. DELETE /api/auth/logout

const response = await fetch('http://localhost:3000/' + 'api/auth/logout', {
      method: 'POST',
      credentials: 'include',
      headers: {
         Accept: 'application/json',
         'Content-Type': 'application/json'
      }
});

I get AccessTokenInvalid error and when logging cookie from request, on API, I get undefined. There is no Cookie header in logout request.

What I tried

• I set proper url in happy-dom/jsdom config – http://localhost:5173 – my frontend port, works with my API CORS
• I tried logging document.cookies, it’s always empty
• I tried to manually setting cookies in document.cookie, worked but when fetching DELETE /api/auth/logout Cookie header was not automatically set to proper value
• I tried changing happy-dom to jsdom with cookieJar option set to true, didn’t work
• I tried manually saving and retrieving cookies from Cookie Jar used by jsdom, worked but this is not what I want. It should be handled automatically like browser does (yes, my api and cookies work proper on real browser, so it happens only in testing environment)
• I’ve read happy-dom and jsdom docs, jsdom docs say that cookies are saved automatically in cookie jar based on set-cookie header

What am I doing wrong?