forked from mirrors/gecko-dev
0b1a146519
ContentTask tasks have a different lifetime than SpecialPowers tasks, with the former being tied to the lifetime of a message manager and the latter tied to the lifetime of a window global. That means that existing ContentTask callers which expect to be able to register load listeners before the creation of a window global, or which expect to persist after a page has navigated, won't work as SpecialPowers tasks. Since those sorts of tasks are not really resilient in the face of Fission, they should really be written to work differently, but this patch mostly just reverts them to using ContentTask for the time being. Differential Revision: https://phabricator.services.mozilla.com/D53744 --HG-- extra : moz-landing-system : lando
109 lines
3.1 KiB
JavaScript
109 lines
3.1 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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requestLongerTimeout(10);
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function countDpiPrefReadsInThread(thread) {
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let count = 0;
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for (let payload of getPayloadsOfType(thread, "PreferenceRead")) {
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if (payload.prefName === "layout.css.dpi") {
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count++;
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}
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}
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return count;
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}
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async function waitForPaintAfterLoad() {
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return SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
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return new Promise(function(resolve) {
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function listener() {
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if (content.document.readyState == "complete") {
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content.requestAnimationFrame(() => content.setTimeout(resolve, 0));
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}
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}
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if (content.document.readyState != "complete") {
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content.document.addEventListener("readystatechange", listener);
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} else {
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listener();
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}
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});
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});
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}
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/**
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* Test the PreferenceRead feature.
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*/
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add_task(async function test_profile_feature_preferencereads() {
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if (!AppConstants.MOZ_GECKO_PROFILER) {
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return;
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}
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Assert.ok(
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!Services.profiler.IsActive(),
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"The profiler is not currently active"
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);
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startProfiler({ features: ["threads", "leaf", "preferencereads"] });
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const url = BASE_URL + "fixed_height.html";
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await BrowserTestUtils.withNewTab(url, async contentBrowser => {
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const contentPid = await SpecialPowers.spawn(
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contentBrowser,
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[],
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() => Services.appinfo.processID
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);
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await waitForPaintAfterLoad();
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// Check that some PreferenceRead profile markers were generated when the
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// feature is enabled.
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{
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const { contentThread } = await stopProfilerNowAndGetThreads(contentPid);
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const timesReadDpiInContent = countDpiPrefReadsInThread(contentThread);
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Assert.greater(
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timesReadDpiInContent,
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0,
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"PreferenceRead profile markers for layout.css.dpi were recorded " +
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"when the PreferenceRead feature was turned on."
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);
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}
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startProfiler({ features: ["threads", "leaf"] });
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// Now reload the tab with a clean run.
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await ContentTask.spawn(contentBrowser, null, () => {
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return new Promise(resolve => {
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addEventListener("pageshow", () => resolve(), {
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capturing: true,
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once: true,
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});
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content.location.reload();
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});
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});
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await waitForPaintAfterLoad();
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// Check that no PreferenceRead markers were recorded when the feature
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// is turned off.
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{
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const {
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parentThread,
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contentThread,
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} = await stopProfilerNowAndGetThreads(contentPid);
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Assert.equal(
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getPayloadsOfType(parentThread, "PreferenceRead").length,
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0,
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"No PreferenceRead profile markers for layout.css.dpi were recorded " +
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"when the PreferenceRead feature was turned on."
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);
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Assert.equal(
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getPayloadsOfType(contentThread, "PreferenceRead").length,
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0,
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"No PreferenceRead profile markers for layout.css.dpi were recorded " +
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"when the PreferenceRead feature was turned on."
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);
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}
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});
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});
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