<!DOCTYPE html>
<meta charset="utf-8">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>

const wait_for_message = () => {
  return new Promise((resolve, reject) => {
    window.addEventListener('message', e => {
      resolve(e);
    }, { once: true });
  });
};

promise_test(async function(t) {
  let url_from = "resources/navigate-cross-origin-vary-cookie.html";
  var w = window.open(url_from);
  let message = await wait_for_message();
  assert_equals(message.data, 'foo=bar');
  w.close();
}, 'Verify that navigating to a prefetched main resource that sets Vary: Cookie does send cookies.');
</script>