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<!DOCTYPE html>
<title>Test Prerender pages maintain their own Client Hint Caches</title>
<meta name="timeout" content="long">
<script src="/common/utils.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/client-hints/resources/open-and-add-load-event.js"></script>
<script src="../resources/utils.js"></script>
<script src="resources/utils.js"></script>
<body>
<script>
setup(() => assertSpeculationRulesIsSupported());
promise_test(
async t => {
const uid = token();
const initialization_bc = new PrerenderChannel(`test-channel`, uid);
t.add_cleanup(_ => initialization_bc.close());
const gotMessage = new Promise(resolve => {
initialization_bc.addEventListener('message', e => {
resolve(e.data);
}, {once: true});
});
// Initialization. For the active pages, it has the client hint cache of
// "sec-ch-ua-bitness".
await open_and_add_load_event('resources/accept-ch.html');
window.open(
`resources/echo-client-hints-received.py?uid=${uid}`, '_blank',
'noopener');
const result = await gotMessage;
assert_equals(result.result, 'PASSED', result.reason);
},
'Prerender page should maintain their own client hints cache and do not propagate it to' +
'the global cache until activation');
</script>
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