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Test Info:
/* Any copyright is dedicated to the Public Domain.
"use strict";
Services.scriptloader.loadSubScript(
this
);
Services.scriptloader.loadSubScript(
new URL("apz_test_utils.js", gTestPath).href,
this
);
/* import-globals-from helper_browser_test_utils.js */
// For openSelectPopup.
Services.scriptloader.loadSubScript(
new URL("helper_browser_test_utils.js", gTestPath).href,
this
);
// Cleanup for paint_listener.js.
add_task(() => {
registerCleanupFunction(() => {
delete window.waitForAllPaintsFlushed;
delete window.waitForAllPaints;
delete window.promiseAllPaintsDone;
});
});
// Setup preferences.
add_task(async () => {
await SpecialPowers.pushPrefEnv({
set: [
["apz.popups.enabled", true],
["apz.popups_without_remote.enabled", true],
["apz.test.logging_enabled", true],
["layout.disable-pixel-alignment", true],
],
});
});
add_task(async () => {
function httpURL(filename) {
let chromeURL = getRootDirectory(gTestPath) + filename;
return chromeURL.replace(
);
}
const url = httpURL("helper_paint_skip_in_popup.html");
const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);
await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {
await content.wrappedJSObject.promiseApzFlushedRepaints();
await content.wrappedJSObject.waitUntilApzStable();
});
// Focus to the select element. This stuff is necessary for `openSelectPopup()`
// since the function is triggered on the focused element.
await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {
const select = content.document.querySelector("select");
const focusPromise = new Promise(resolve => {
select.addEventListener("focus", resolve, { once: true });
});
select.focus();
await focusPromise;
});
// Open the select popup.
const selectPopup = await openSelectPopup();
const arrowscrollbox = selectPopup.shadowRoot.querySelector("arrowscrollbox");
ok(arrowscrollbox, "There's <arrowscrollbox> inside the popup");
const scrollbox = arrowscrollbox.shadowRoot.querySelector("scrollbox");
ok(scrollbox, "There's <scrollbox> inside the popup");
// Scroll down as much as possible to get the max scroll offset.
scrollbox.scrollTo(0, 100000);
const scrollMax = scrollbox.scrollTop;
ok(scrollMax, "The max scroll offset should not be zero");
// Restore the scroll offset.
// Note that this restoring needs to be done in the same paint where the above scrollTo happened so that
// APZ will never sample the max scroll offset at this moment.
scrollbox.scrollTo(0, 0);
await promiseApzFlushedRepaints(selectPopup);
// Now scroll to a position which is close to the bottom.
scrollbox.scrollBy(0, scrollMax - 10);
await promiseApzFlushedRepaints(selectPopup);
// Try to scroll to the bottom with a `scrollBy` call, even if paint-skip
// is enabled, this scroll operation should be reflected to APZ.
scrollbox.scrollBy(0, 10);
// Wait a bit to make sure that APZ has sampled the new scroll offset.
await promiseApzFlushedRepaints(selectPopup);
await promiseApzFlushedRepaints(selectPopup);
is(
scrollbox.scrollTop,
scrollMax,
`The scroll offset: ${scrollbox.scrollTop} on the main-thread should be ${scrollMax}`
);
const sampledData = collectSampledScrollOffsets(scrollbox, selectPopup);
ok(sampledData.length, "There should be at least one collected offsets");
ok(
sampledData.some(
data => SpecialPowers.wrap(data).scrollOffsetY - scrollMax < 1.0
),
`There should be ${scrollMax} in [${sampledData.map(data => SpecialPowers.wrap(data).scrollOffsetY)}]`
);
BrowserTestUtils.removeTab(tab);
});