forked from mirrors/gecko-dev
7b53fcdbb6
MozReview-Commit-ID: BFaOv5i5Tun --HG-- extra : rebase_source : 5c2b5d1867eb5b48c56725b87d71dae72a83eb34
83 lines
2.6 KiB
HTML
83 lines
2.6 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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Bug 1171489 - Tests if the framerate actor does not record timestamps from multiple frames.
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-->
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<head>
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<meta charset="utf-8">
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<title>Framerate actor test</title>
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<script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
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<script type="application/javascript" src="inspector-helpers.js"></script>
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<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
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</head>
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<body>
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<pre id="test">
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<script>
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"use strict";
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window.onload = function () {
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SimpleTest.waitForExplicitFinish();
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const {FramerateFront} = require("devtools/shared/fronts/framerate");
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let url = document.getElementById("testContent").href;
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attachURL(url, onTab);
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function onTab(_, client, form, contentDoc) {
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let contentWin = contentDoc.defaultView;
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let front = FramerateFront(client, form);
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front.startRecording().then(() => {
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window.setTimeout(() => {
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// Wait for the iframe to be loaded again
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window.addEventListener("message", function loaded(event) {
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if (event.data === "ready") {
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window.removeEventListener("message", loaded);
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/* eslint-disable max-nested-callbacks */
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window.setTimeout(() => {
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front.stopRecording().then(ticks => {
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onRecordingStopped(client, ticks);
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});
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}, 1000);
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/* eslint-enable max-nested-callbacks */
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}
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});
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contentWin.location.reload();
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}, 1000);
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});
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}
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function onRecordingStopped(client, ticks) {
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let diffs = [];
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info(`Got ${ticks.length} ticks.`);
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for (let i = 1; i < ticks.length; i++) {
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let prev = ticks[i - 1];
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let curr = ticks[i];
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diffs.push(curr - prev);
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info(curr + " - " + (curr - prev));
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}
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// 1000 / 60 => 16.666... so we shouldn't get more than diffs of 16.66.. but
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// when we get ticks from other frames they're usually at diffs of < 1. Sometimes
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// ticks can still be less than 16ms even on one frame (usually following a very slow
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// frame), so use a low number (2) to be our threshold
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let THRESHOLD = 2;
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ok(ticks.length >= 20,
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"we should have atleast 20 ticks over the course of two seconds.");
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let belowThreshold = diffs.filter(v => v <= THRESHOLD);
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ok(belowThreshold.length <= 10,
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"we should have very few frames less than the threshold");
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client.close().then(() => {
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DebuggerServer.destroy();
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SimpleTest.finish();
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});
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}
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};
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</script>
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</pre>
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<a id="testContent" target="_blank" href="inspector-traversal-data.html">Test Document</a>
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</body>
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</html>
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