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diff --git a/netwerk/test/perf/perftest_http3_youtube_watch.js b/netwerk/test/perf/perftest_http3_youtube_watch.js
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+// 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/.
+/* eslint-env node */
+
+/*
+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=COU5T-Wafa4";
+ 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);
+
+ 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
+ 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.",
+};