1 files changed, 106 insertions, 0 deletions
diff --git a/dom/media/test/browser/browser_telemetry_video_hardware_decoding_support.js b/dom/media/test/browser/browser_telemetry_video_hardware_decoding_support.js
new file mode 100644
index 0000000000..3b1b41c03f
--- /dev/null
+++ b/dom/media/test/browser/browser_telemetry_video_hardware_decoding_support.js
@@ -0,0 +1,106 @@
+/**
+ * This test is used to ensure that the scalar which indicates whether hardware
+ * decoding is supported for a specific video codec type can be recorded
+ * correctly.
+ */
+"use strict";
+
+add_task(async function setupTestingPref() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      // In order to test av1 in the chrome process, see https://bit.ly/3oF0oan
+      ["media.rdd-process.enabled", false],
+    ],
+  });
+});
+
+const ALL_SCALAR = "media.video_hardware_decoding_support";
+const HD_SCALAR = "media.video_hd_hardware_decoding_support";
+
+add_task(async function testVideoCodecs() {
+  // There are still other video codecs, but we only care about these popular
+  // codec types.
+  const testFiles = [
+    { fileName: "gizmo.mp4", type: "video/avc" },
+    { fileName: "gizmo.webm", type: "video/vp9" },
+    { fileName: "bipbop_short_vp8.webm", type: "video/vp8" },
+    { fileName: "av1.mp4", type: "video/av1" },
+    { fileName: "bunny_hd_5s.mp4", type: "video/avc", hd: true },
+  ];
+
+  for (const file of testFiles) {
+    const { fileName, type, hd } = file;
+    let video = document.createElement("video");
+    video.src = GetTestWebBasedURL(fileName);
+    await video.play();
+    let snapshot = Services.telemetry.getSnapshotForKeyedScalars(
+      "main",
+      false
+    ).parent;
+    ok(
+      snapshot.hasOwnProperty(ALL_SCALAR),
+      `Found stored scalar '${ALL_SCALAR}'`
+    );
+    ok(
+      snapshot[ALL_SCALAR].hasOwnProperty(type),
+      `Found key '${type}' in '${ALL_SCALAR}'`
+    );
+    if (hd) {
+      ok(
+        snapshot.hasOwnProperty(HD_SCALAR),
+        `HD video '${fileName}' should record a scalar '${HD_SCALAR}'`
+      );
+      ok(
+        snapshot[HD_SCALAR].hasOwnProperty(type),
+        `Found key '${type}' in '${HD_SCALAR}'`
+      );
+    } else {
+      ok(
+        !snapshot.hasOwnProperty(HD_SCALAR),
+        `SD video won't store a scalar '${HD_SCALAR}'`
+      );
+    }
+    video.src = "";
+    Services.telemetry.clearScalars();
+  }
+});
+
+add_task(async function testAudioCodecs() {
+  const testFiles = [
+    "small-shot.ogg",
+    "small-shot.m4a",
+    "small-shot.mp3",
+    "small-shot.flac",
+  ];
+  for (const file of testFiles) {
+    let audio = document.createElement("audio");
+    info(GetTestWebBasedURL(file));
+    audio.src = GetTestWebBasedURL(file);
+    await audio.play();
+    let snapshot = Services.telemetry.getSnapshotForKeyedScalars(
+      "main",
+      false
+    ).parent;
+    ok(
+      !snapshot ||
+        (!snapshot.hasOwnProperty(ALL_SCALAR) &&
+          !snapshot.hasOwnProperty(HD_SCALAR)),
+      `Did not record scalar for ${file}`
+    );
+    audio.src = "";
+  }
+});
+
+/**
+ * Return a web-based URL for a given file based on the testing directory.
+ * @param {String} fileName
+ *        file that caller wants its web-based url
+ */
+function GetTestWebBasedURL(fileName) {
+  return (
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      "http://example.org"
+    ) + fileName
+  );
+}