dedicatedworker.tentative.window.js

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/back-forward-cache/broadcastchannel/dedicatedworker.tentative.window.html - WPT Dashboard Interop Dashboard

// META: title=BroadcastChannel messages dispatched to dedicated worker in bfcache should be queued.

// META: script=/common/dispatcher/dispatcher.js

// META: script=/common/get-host-info.sub.js

// META: script=/common/utils.js

// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js

// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js

// META: script=/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-helper.js

'use strict';

// Ensure that broadcast channel messages sent to a dedicated

// worker in bfcache are queued and dispatched upon restore.

promise_test(async t => {

  const rcHelper = new RemoteContextHelper();

  // Open a window with noopener so that BFCache will work.

  const rc1 = await rcHelper.addWindow(

      /*extraConfig=*/ {}, /*options=*/ {features: 'noopener'});

  let workerVar;

  const worker = await rc1.addWorker(

      workerVar,

        scripts: ['../resources/worker-with-broadcastchannel.js'],

},

);

  await assertSimplestScriptRuns(worker);

  await prepareForBFCache(rc1);

  const newRemoteContextHelper = await rc1.navigateToNew();

  await assertSimplestScriptRuns(newRemoteContextHelper);

  // Send a message to a dedicated worker in bfcache.

  let channel = new BroadcastChannel('foo');

  channel.postMessage('bar');

  await newRemoteContextHelper.historyBack();

  // Make sure that rc1 gets restored without getting evicted. Messages

  // while in bfcache should be queued.

  await assertImplementsBFCacheOptional(rc1);

  // A message should arrive upon bfcache restore.

  await worker.executeScript(() => {

    return waitForEventsPromise(1);

});

});