Source code
Revision control
Copy as Markdown
Other Tools
Test Info:
- Manifest: netwerk/test/perf/perftest.toml
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
/*
Ensure the `--firefox.preference=network.http.http3.enable:true` is
set for this test.
*/
async function test(context, commands) {
let rootUrl = "https://www.youtube.com/watch?v=YE7VzlLtp-4";
let waitTime = 20000;
if (
typeof context.options.browsertime !== "undefined" &&
typeof context.options.browsertime.waitTime !== "undefined"
) {
waitTime = context.options.browsertime.waitTime;
}
// Make firefox learn of HTTP/3 server
await commands.navigate(rootUrl);
// Set a cookie to prevent the cookie banner from appearing on refresh.
await commands.js.runAndWait(`
document.cookie =
'SOCS=CAESEwgDEgk4NTQ5OTI2NTgaAmVuIAEaBgiAlpbLBg; path=/; domain=.youtube.com; Secure; SameSite=None';
`);
let cycles = 1;
for (let cycle = 0; cycle < cycles; cycle++) {
await commands.measure.start("pageload");
await commands.navigate(rootUrl);
// Make sure the video is running
if (
await commands.js.run(`return document.querySelector("video").paused;`)
) {
throw new Error("Video should be running but it's paused");
}
// Disable youtube autoplay
// Note: the button is no longer called `toggleButton`
// await commands.click.byIdAndWait("toggleButton");
// Start playback quality measurements
const start = await commands.js.run(`return performance.now();`);
while (
!(await commands.js.run(`
return document.querySelector("video").ended;
`)) &&
!(await commands.js.run(`
return document.querySelector("video").paused;
`)) &&
(await commands.js.run(`return performance.now();`)) - start < waitTime
) {
await commands.wait.byTime(5000);
context.log.info("playing...");
}
// Video done, now gather metrics
const playbackQuality = await commands.js.run(
`return document.querySelector("video").getVideoPlaybackQuality();`
);
await commands.measure.stop();
commands.measure.result[0].browserScripts.pageinfo.droppedFrames =
playbackQuality.droppedVideoFrames;
commands.measure.result[0].browserScripts.pageinfo.decodedFrames =
playbackQuality.totalVideoFrames;
}
}
module.exports = {
test,
owner: "Network Team",
component: "netwerk",
name: "youtube-noscroll",
description: "Measures quality of the video being played.",
};