chromium/third_party/blink/web_tests/external/wpt/cookie-store/cookieStore_get_set_across_frames.https.html

<!doctype html>
<meta charset='utf-8'>
<title>Async Cookies: cookieStore basic API across frames</title>
<link rel='help' href='https://github.com/WICG/cookie-store'>
<link rel='author' href='[email protected]' title='Jarryd Goodman'>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<style>iframe { display: none; }</style>
<iframe id='iframe'></iframe>
<script>
'use strict';

promise_test(async t => {
  const iframe = document.getElementById('iframe');
  const frameCookieStore = iframe.contentWindow.cookieStore;

  const oldCookie = await frameCookieStore.get('cookie-name');
  assert_equals(oldCookie, null,
      'Precondition not met: cookie store should be empty');

  await cookieStore.set('cookie-name', 'cookie-value');
  t.add_cleanup(async () => {
    await cookieStore.delete('cookie-name');
  });

  const frameCookie = await frameCookieStore.get('cookie-name');
  assert_equals(frameCookie.value, 'cookie-value');
}, 'cookieStore.get() sees cookieStore.set() in frame');

promise_test(async t => {
  const iframe = document.getElementById('iframe');
  const frameCookieStore = iframe.contentWindow.cookieStore;

  const oldCookie = await frameCookieStore.get('cookie-name');
  assert_equals(oldCookie, null,
      'Precondition not met: cookie store should be empty');

  await frameCookieStore.set('cookie-name', 'cookie-value');
  t.add_cleanup(async () => {
    await frameCookieStore.delete('cookie-name');
  });

  const cookie = await cookieStore.get('cookie-name');
  assert_equals(cookie.value, 'cookie-value');
}, 'cookieStore.get() in frame sees cookieStore.set()')
</script>