browser_scrollPositionsReaderMode.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

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

"use strict";

const BASE = "http://example.com/browser/browser/components/sessionstore/test/";

const READER_MODE_URL =

  "about:reader?url=" +

  encodeURIComponent(BASE + "browser_scrollPositions_readerModeArticle.html");

// Randomized set of scroll positions we will use in this test.

const SCROLL_READER_MODE_Y = Math.round(400 * (1 + Math.random()));

const SCROLL_READER_MODE_STR = "0," + SCROLL_READER_MODE_Y;

requestLongerTimeout(2);

/**

 * Test that scroll positions of about reader page after restoring background

 * tabs in a restored window (bug 1153393).

*/

add_task(async function test_scroll_background_about_reader_tabs() {

  await pushPrefs(["browser.sessionstore.restore_on_demand", true]);

  let newWin = await BrowserTestUtils.openNewBrowserWindow();

  let tab = BrowserTestUtils.addTab(newWin.gBrowser, READER_MODE_URL);

  let browser = tab.linkedBrowser;

  await Promise.all([

    BrowserTestUtils.browserLoaded(browser),

    BrowserTestUtils.waitForContentEvent(browser, "AboutReaderContentReady"),

]);

  // Scroll down a little.

  await setScrollPosition(browser, 0, SCROLL_READER_MODE_Y);

  await checkScroll(tab, { scroll: SCROLL_READER_MODE_STR }, "scroll is fine");

  // Close the window

  await BrowserTestUtils.closeWindow(newWin);

  await forceSaveState();

  // Now restore the window

  newWin = ss.undoCloseWindow(0);

  // Make sure to wait for the window to be restored.

  await BrowserTestUtils.waitForEvent(newWin, "SSWindowStateReady");

  is(newWin.gBrowser.tabs.length, 2, "There should be two tabs");

  // The second tab should be the one we loaded URL at still

  tab = newWin.gBrowser.tabs[1];

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

  browser = tab.linkedBrowser;

  // Ensure there are no pending queued messages in the child.

  await TabStateFlusher.flush(browser);

  // Now check to see if the background tab remembers where it

  // should be scrolled to.

  newWin.gBrowser.selectedTab = tab;

  await Promise.all([

    promiseTabRestored(tab),

    BrowserTestUtils.waitForContentEvent(

      tab.linkedBrowser,

      "AboutReaderContentReady"

),

]);

  await checkScroll(

    tab,

    { scroll: SCROLL_READER_MODE_STR },

    "scroll is still fine"

);

  await BrowserTestUtils.closeWindow(newWin);

});