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<!DOCTYPE html>
<title>Access to the Web Locks API is deferred</title>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<body>
<script>
setup(() => assertSpeculationRulesIsSupported());
function RunTest(method, description) {
promise_test(async t => {
const uid = token();
const bc = new PrerenderChannel('test-channel', uid);
const gotMessage = new Promise(resolve => {
bc.addEventListener('message', e => {
resolve(e.data);
}, {
once: true
});
});
const url = `resources/web-locks.html?method=${method}&uid=${uid}`;
window.open(url, '_blank', 'noopener');
const result = await gotMessage;
const expected = [
{event: `started waiting navigator.locks.${method}`, prerendering: true},
{event: 'prerendering change', prerendering: false},
{event: `finished waiting navigator.locks.${method}`, prerendering: false},
];
assert_equals(result.length, expected.length);
for (let i = 0; i < result.length; i++) {
assert_equals(result[i].event, expected[i].event, `event[${i}]`);
assert_equals(result[i].prerendering, expected[i].prerendering,
`prerendering[${i}]`);
}
bc.close();
// Send a close signal to PrerenderEventCollector on the prerendered page.
new PrerenderChannel('close', uid).postMessage('');
}, description);
}
RunTest(`request`, `navigator.locks.request should be deferred until the prerendered page is activated`);
RunTest(`query`, `navigator.locks.query should be deferred until the prerendered page is activated`);
</script>
</body>
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