browser_backforward_restore_scroll.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

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

"use strict";

const ROOT = getRootDirectory(gTestPath).replace(

  "chrome://mochitests/content",

  "http://mochi.test:8888"

);

const URL1 = ROOT + "file_backforward_restore_scroll.html";

// eslint-disable-next-line @microsoft/sdl/no-insecure-url

const URL2 = "http://example.net/";

const SCROLL0 = 500;

const SCROLL1 = 1000;

function promiseBrowserLoaded(url) {

  return BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser, false, url);

add_task(async function test() {

  await BrowserTestUtils.openNewForegroundTab(gBrowser, URL1);

  // Scroll the 2 frames.

  let children = gBrowser.selectedBrowser.browsingContext.children;

  await SpecialPowers.spawn(children[0], [SCROLL0], scrollY =>

    content.scrollTo(0, scrollY)

);

  await SpecialPowers.spawn(children[1], [SCROLL1], scrollY =>

    content.scrollTo(0, scrollY)

);

  // Navigate forwards then backwards.

  let loaded = promiseBrowserLoaded(URL2);

  BrowserTestUtils.startLoadingURIString(gBrowser.selectedBrowser, URL2);

  await loaded;

  loaded = promiseBrowserLoaded(URL1);

  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {

    content.history.back();

});

  await loaded;

  // And check the results.

  children = gBrowser.selectedBrowser.browsingContext.children;

  await SpecialPowers.spawn(children[0], [SCROLL0], scrollY => {

    Assert.equal(content.scrollY, scrollY, "frame 0 has correct scroll");

});

  await SpecialPowers.spawn(children[1], [SCROLL1], scrollY => {

    Assert.equal(content.scrollY, scrollY, "frame 1 has correct scroll");

});

  gBrowser.removeTab(gBrowser.selectedTab);

});