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<!DOCTYPE html>
<title>Construction of Web Workers 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="/common/dispatcher/dispatcher.js"></script>
<script src="resources/utils.js"></script>
<body>
<script>
setup(() => assertSpeculationRulesIsSupported());
promise_test(async t => {
const {exec, activate} = await create_prerendered_page(t);
const workerURL = new URL('resources/worker-post-timeOrigin.js', location.href).toString();
await exec(workerURL => {
window.worker = new Worker(workerURL);
window.waitForWorker = new Promise(resolve => worker.addEventListener('message', e => {
resolve({
prerendering: document.prerendering,
activationStart: performance.getEntriesByType('navigation')[0].activationStart,
workerLoad: performance.getEntriesByName(workerURL)[0].startTime,
workerStart: e.data});
}), workerURL);
}, [workerURL]);
// We want to prevent false success by waiting for enough time to make sure the worker is not
// yet initialized
await new Promise(resolve => t.step_timeout(resolve, 500));
await activate();
const {workerStart, activationStart, workerLoad, prerendering} = await exec(() => window.waitForWorker);
assert_false(prerendering, "DedicatedWorker should be suspended until activated");
assert_greater_than(activationStart, workerLoad, "Loading the worker script should not be delayed");
assert_greater_than(workerStart, activationStart, "Starting the worker should be delayed");
}, "Dedicated workers should be loaded in suspended state until activated");
promise_test(async t => {
const {exec, activate} = await create_prerendered_page(t);
const workerURL = new URL(`resources/shared-worker.py?id=${token()}`, location.href).toString();
await exec(workerURL => {
window.worker = new SharedWorker(workerURL, 'dummy');
window.worker.port.start();
window.waitForSharedWorkerLoadingReport =
fetch(workerURL + "&check=true")
.then(r => t.text())
.then(text => text === 'ok' && document.prerendering);
window.waitForWorker = new Promise(resolve => worker.port.addEventListener('message', e => {
resolve({
prerendering: document.prerendering,
activationStart: performance.getEntriesByType('navigation')[0].activationStart,
workerLoad: performance.getEntriesByName(workerURL)[0]?.startTime,
workerStart: e.data});
}), workerURL);
}, [workerURL]);
await new Promise(resolve => t.step_timeout(resolve, 300));
await activate();
const {workerStart, activationStart, workerLoad, prerendering} = await exec(() => window.waitForWorker);
assert_false(prerendering, "SharedWorker should be suspended until activated");
assert_greater_than(activationStart, workerLoad, "Loading the worker script should not be delayed");
assert_greater_than(workerStart, activationStart, "Starting the worker should be delayed");
}, "Shared workers should be loaded in suspended state until activated");
promise_test(async t => {
const {exec, activate} = await create_prerendered_page(t);
const workerURL = new URL(`resources/shared-worker.py?id=${token()}`, location.href).toString();
const workerStartTime1 = await new Promise(resolve => {
const worker = new SharedWorker(workerURL, 'worker');
worker.port.start();
worker.port.addEventListener('message', e => resolve(e.data));
});
await exec(workerURL => {
window.worker = new SharedWorker(workerURL, 'worker');
window.worker.port.start();
window.waitForWorker = new Promise(resolve => worker.port.addEventListener('message', e => {
resolve({
prerendering: document.prerendering,
activationStart: performance.getEntriesByType('navigation')[0].activationStart,
workerLoad: performance.getEntriesByName(workerURL)[0]?.startTime,
workerStartTime2: e.data});
}), workerURL);
}, [workerURL]);
await new Promise(resolve => t.step_timeout(resolve, 300));
await activate();
const {workerStartTime2, activationStart, workerLoad, prerendering} = await exec(() => window.waitForWorker);
assert_true(prerendering, "An existing SharedWorker should be accessible while prerendering");
assert_greater_than(activationStart, workerLoad, "Loading the worker script should not be delayed");
assert_equals(workerStartTime1, workerStartTime2, "The prerendered page should connect to the existing worker");
assert_greater_than(activationStart, workerStartTime2, "Starting the worker should be done before activation");
}, "Existing shared workers should be accessible before activation");
</script>
</body>
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