browser_dbg-javascript-tracer-worker.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */

// Tests tracing web workers

"use strict";

add_task(async function testTracingWorker() {

  await pushPref("devtools.debugger.features.javascript-tracing", true);

  // We have to enable worker targets and disable this pref to have functional tracing for workers

  await pushPref("dom.worker.console.dispatch_events_to_main_thread", false);

  const dbg = await initDebugger("doc-scripts.html");

  info("Instantiate a worker");

  const { targetCommand } = dbg.toolbox.commands;

  let onAvailable;

  const onNewTarget = new Promise(resolve => {

    onAvailable = ({ targetFront }) => {

      resolve(targetFront);

};

});

  await targetCommand.watchTargets({

    types: [targetCommand.TYPES.FRAME],

    onAvailable,

});

  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], async function () {

    content.worker = new content.Worker("simple-worker.js");

});

  info("Wait for the worker target");

  const workerTarget = await onNewTarget;

  await waitFor(

    () => findAllElements(dbg, "threadsPaneItems").length == 2,

    "Wait for the two threads to be displayed in the thread pane"

);

  const threadsEl = findAllElements(dbg, "threadsPaneItems");

  is(threadsEl.length, 2, "There are two threads in the thread panel");

  info("Enable tracing on all threads");

  await clickElement(dbg, "trace");

  info("Wait for tracing to be enabled for the worker");

  await waitForState(dbg, () => {

    return dbg.selectors.getIsThreadCurrentlyTracing(

      workerTarget.threadFront.actorID

);

});

  // `timer` is called within the worker via a setInterval of 1 second

  await hasConsoleMessage(dbg, "setIntervalCallback");

  await hasConsoleMessage(dbg, "λ timer");

  // Also verify that postMessage are traced

  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], async function () {

    content.worker.postMessage("foo");

});

  await hasConsoleMessage(dbg, "DOM | message");

  await hasConsoleMessage(dbg, "λ onmessage");

  await dbg.toolbox.closeToolbox();

});