CookieJar.cookiesForURL(url)

import http from 'k6/http';
import { check } from 'k6';

export default function () {
  const res = http.get('https://httpbin.org/cookies/set?my_cookie=hello%20world', { redirects: 0 });
  const jar = http.cookieJar();
  const cookies = jar.cookiesForURL('http://httpbin.org/');
  check(res, {
    "has cookie 'my_cookie'": (r) => cookies.my_cookie.length > 0,
    'cookie has correct value': (r) => cookies.my_cookie[0] === 'hello world',
  });
}