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/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
add_task(async function test_check_layers_cleared() {
let initialTab = gBrowser.selectedTab;
await BrowserTestUtils.withNewTab("about:blank", async browser => {
await ContentTask.spawn(browser, null, () => {
return new Promise(resolve => {
content.requestAnimationFrame(() => {
content.setTimeout(
"let start = performance.now(); while (performance.now() < start + 5000);"
);
resolve();
});
});
});
let layersCleared = BrowserTestUtils.waitForEvent(
window,
"MozLayerTreeCleared"
);
let startWaiting = performance.now();
await BrowserTestUtils.switchTab(gBrowser, initialTab);
await layersCleared;
ok(
performance.now() < startWaiting + 2000,
"MozLayerTreeCleared should be dispatched while the script is still running"
);
});
});
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