1 files changed, 86 insertions, 0 deletions
diff --git a/netwerk/test/perf/perftest_http3_youtube_watch_scroll.js b/netwerk/test/perf/perftest_http3_youtube_watch_scroll.js
new file mode 100644
index 0000000000..8f30fcc5e6
--- /dev/null
+++ b/netwerk/test/perf/perftest_http3_youtube_watch_scroll.js
@@ -0,0 +1,86 @@
+// 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
+    // XXX: Should we start the video ourself?
+    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();`);
+    let counter = 1;
+    let direction = 0;
+    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)
+    ) {
+      // Reset the scroll after going down 10 times
+      direction = counter * 1000;
+      if (direction > 10000) {
+        counter = -1;
+      }
+      counter++;
+
+      await commands.js.runAndWait(
+        `window.scrollTo({ top: ${direction}, behavior: 'smooth' })`
+      );
+      context.log.info("playing while scrolling...");
+    }
+
+    // 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-scroll",
+  description: "Measures quality of the video being played.",
+};