browser_revive_crashed_bg_tabs.js

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/* Any copyright is dedicated to the Public Domain.

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

/**

 * Tests that even if the user has set their tabs to restore

 * immediately on session start, that background tabs after a

 * content process crash restore on demand.

*/

"use strict";

const PAGE_1 =

  "data:text/html,<html><body>A%20regular,%20everyday,%20normal%20page.";

const PAGE_2 =

  "data:text/html,<html><body>Another%20regular,%20everyday,%20normal%20page.";

add_setup(async function () {

  await pushPrefs(

    ["dom.ipc.processCount", 1],

    ["browser.sessionstore.restore_on_demand", false]

);

});

add_task(async function test_revive_bg_tabs_on_demand() {

  let newTab1 = BrowserTestUtils.addTab(gBrowser, PAGE_1);

  let browser1 = newTab1.linkedBrowser;

  await BrowserTestUtils.browserLoaded(browser1);

  gBrowser.selectedTab = newTab1;

  let newTab2 = BrowserTestUtils.addTab(gBrowser, PAGE_2);

  let browser2 = newTab2.linkedBrowser;

  await BrowserTestUtils.browserLoaded(browser2);

  await TabStateFlusher.flush(browser2);

  // Now crash the selected tab

  let windowReady = BrowserTestUtils.waitForEvent(window, "SSWindowStateReady");

  await BrowserTestUtils.crashFrame(browser1);

  ok(newTab1.hasAttribute("crashed"), "Selected tab should be crashed");

  ok(!newTab2.hasAttribute("crashed"), "Background tab should not be crashed");

  // Wait until we've had a chance to restore all tabs immediately

  await windowReady;

  // But we should not have restored the background tab

  ok(newTab2.hasAttribute("pending"), "Background tab should be pending");

  // Now select newTab2 to make sure it restores.

  let newTab2Restored = promiseTabRestored(newTab2);

  gBrowser.selectedTab = newTab2;

  await newTab2Restored;

  ok(browser2.isRemoteBrowser, "Restored browser should be remote");

  BrowserTestUtils.removeTab(newTab1);

  BrowserTestUtils.removeTab(newTab2);

});