browser_webconsole_multiple_windows_and_tabs.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

// Tests that the Web Console doesn't leak when multiple tabs and windows are

// opened and then closed. See Bug 595350.

"use strict";

const TEST_URI =

  "data:text/html;charset=utf-8,<!DOCTYPE html>Web Console test for bug 595350";

add_task(async function () {

  requestLongerTimeout(3);

  // Bug 1518138: GC heuristics are broken for this test, so that the test

  // ends up running out of memory. Try to work-around the problem by GCing

  // before the test begins.

  Cu.forceShrinkingGC();

  const win1 = window;

  info("Add test tabs in first window");

  const tab1 = await addTab(TEST_URI, { window: win1 });

  const tab2 = await addTab(TEST_URI, { window: win1 });

  info("Test tabs added in first window");

  info("Open a second window");

  const windowOpenedPromise = BrowserTestUtils.waitForNewWindow();

  const win2 = OpenBrowserWindow();

  await windowOpenedPromise;

  info("Add test tabs in second window");

  const tab3 = await addTab(TEST_URI, { window: win2 });

  const tab4 = await addTab(TEST_URI, { window: win2 });

  info("Opening console in each test tab");

  const tabs = [tab1, tab2, tab3, tab4];

  for (const tab of tabs) {

    // Open the console in tab${i}.

    const hud = await openConsole(tab);

    const browser = hud.commands.descriptorFront.localTab.linkedBrowser;

    const message = "message for tab " + tabs.indexOf(tab);

    // Log a message in the newly opened console.

    const onMessage = waitForMessageByType(hud, message, ".console-api");

    await SpecialPowers.spawn(browser, [message], function (msg) {

      content.console.log(msg);

});

    await onMessage;

    await hud.toolbox.sourceMapURLService.waitForSourcesLoading();

  const onConsolesDestroyed = waitForNEvents("web-console-destroyed", 4);

  info("Close the second window");

  win2.close();

  info("Close the test tabs in the first window");

  win1.gBrowser.removeTab(tab1);

  win1.gBrowser.removeTab(tab2);

  info("Wait for 4 web-console-destroyed events");

  await onConsolesDestroyed;

  ok(true, "Received web-console-destroyed for each console opened");

});

/**

 * Wait for N events helper customized to work with Services.obs.add/removeObserver.

*/

function waitForNEvents(expectedTopic, times) {

  return new Promise(resolve => {

    let count = 0;

    function onEvent(subject, topic) {

      if (topic !== expectedTopic) {

        return;

      count++;

      info(`Received ${expectedTopic} ${count} time(s).`);

      if (count == times) {

        resolve();

    registerCleanupFunction(() => {

      Services.obs.removeObserver(onEvent, expectedTopic);

});

    Services.obs.addObserver(onEvent, expectedTopic);

});