browser_omta_tearoff_tab.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

var testPage =

  "data:text/html,<head><style>body{animation: fadein 1s infinite;} @keyframes fadein{from{opacity: 0;}}</style><body>Text";

add_task(async function test() {

  let tab = BrowserTestUtils.addTab(gBrowser, testPage, {

    skipAnimation: true,

});

  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);

  await BrowserTestUtils.switchTab(gBrowser, tab);

  await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {

    const anim = content.document.getAnimations()[0];

    await anim.ready;

    ok(SpecialPowers.wrap(anim).isRunningOnCompositor);

});

  let promiseWin = BrowserTestUtils.waitForNewWindow();

  let newWin = gBrowser.replaceTabWithWindow(tab);

  await promiseWin;

  Assert.ok(

    ChromeUtils.vsyncEnabled(),

    "vsync should be enabled as we have a tab with an animation"

);

  newWin.close();

  await TestUtils.waitForCondition(

    () => !ChromeUtils.vsyncEnabled(),

    "wait for vsync to be disabled"

);

  Assert.ok(

    !ChromeUtils.vsyncEnabled(),

    "vsync should be disabled after closing window that contained an animated tab"

);

});