forked from mirrors/gecko-dev
5eb26330b0
This also includes a change to make sure restoreHiDPIMode gets called even if the test failed. Differential Revision: https://phabricator.services.mozilla.com/D156266
62 lines
1.5 KiB
JavaScript
62 lines
1.5 KiB
JavaScript
/* Any copyright is dedicated to the Public Domain.
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http://creativecommons.org/publicdomain/zero/1.0/ */
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"use strict";
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const PAGECONTENT =
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"<!DOCTYPE html>" +
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"<html>" +
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"<style>" +
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"html { " +
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" height: 120vh;" +
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" overflow-y: scroll;" +
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"}" +
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"</style>" +
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"</html>";
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const pageUrl = "data:text/html," + encodeURIComponent(PAGECONTENT);
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add_task(async function test() {
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if (window.devicePixelRatio == 1) {
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ok(
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true,
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"Skip this test since this test is supposed to run on HiDPI mode, " +
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"the devixePixelRato on this machine is " +
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window.devicePixelRatio
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);
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return;
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}
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const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, pageUrl);
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// Scroll the content a bit.
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const originalScrollPosition = await SpecialPowers.spawn(
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tab.linkedBrowser,
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[],
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async () => {
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content.document.scrollingElement.scrollTop = 100;
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return content.document.scrollingElement.scrollTop;
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}
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);
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// Disabling HiDPI mode and check the scroll position.
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SpecialPowers.DOMWindowUtils.setHiDPIMode(false);
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// Make sure we restore even if this test failed.
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registerCleanupFunction(() => {
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SpecialPowers.DOMWindowUtils.restoreHiDPIMode();
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});
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const scrollPosition = await SpecialPowers.spawn(
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tab.linkedBrowser,
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[],
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async () => {
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return content.document.scrollingElement.scrollTop;
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}
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);
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is(
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originalScrollPosition,
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scrollPosition,
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"The scroll position should be kept"
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);
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BrowserTestUtils.removeTab(tab);
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});
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