speculation-rules/prerender/cache-storage.https.html

<!DOCTYPE html>
<title>Same-origin prerendering can access cache storage</title>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="/common/utils.js"></script>
<script src="../resources/utils.js"></script>
<script src="resources/utils.js"></script>

<body>
<script>
setup(() => assertSpeculationRulesIsSupported());

promise_test(async t => {
  const cacheName = token();
  const cache = await caches.open(cacheName);
  await cache.add('resources/cache.txt');
  t.add_cleanup(() => caches.delete(cacheName));
  const response = await cache.match('resources/cache.txt');
  const cacheText = await (response ? response.text() : 'primary cache match failed');

  const {exec} = await create_prerendered_page(t);
  const result = await exec(async cacheName => {
    const cache = await caches.open(cacheName);
    const match = await cache.match('cache.txt');
    return await match.text();
  }, [cacheName]);

  assert_equals(
    result, cacheText,
    'prerendering page should be able to read from cache storage.');
}, 'prerendering page should be able to access cache storage')

</script>