speculation-rules/prerender/workers.https.html - external/github.com/web-platform-tests/wpt - Git at Google

 <!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>
 <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>
	<!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>
	<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>