Migrate fast/mediarecorder/MediaRecorder-audio-video to WPT

hyowon-igalia · chromium-wpt-export-bot · commit d99447a9b27e · 2026-05-28T00:22:34.000-07:00
Already covered by existing WPT tests: - Stream track validation: MediaRecorder-creation.https.html - State transitions (inactive → recording): MediaRecorder-events-and-exceptions.html - requestData() triggers dataavailable: MediaRecorder-requestData.html Migrated coverage to WPT: - audio-only stop/onstop: MediaRecorder-stop.html - video-only/audio-only monotonic timecode: MediaRecorder-blob-timecode.https.html Bug: 485677942 Change-Id: Ia69ad06f7590e75d827d22e07bb9583177701fc2 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7741340 Reviewed-by: Dale Curtis <dalecurtis@chromium.org> Reviewed-by: Markus Handell <handellm@google.com> Commit-Queue: Hyowon Kim <hyowon@igalia.com> Cr-Commit-Position: refs/heads/main@{#1637356}
diff --git a/mediacapture-record/MediaRecorder-blob-timecode.https.html b/mediacapture-record/MediaRecorder-blob-timecode.https.html
@@ -12,9 +12,9 @@
 <body>
 
 <script>
-  promise_test(async t => {
+  async function testBlobTimecode(t, constraints) {
     await setMediaPermission();
-    const stream = await navigator.mediaDevices.getUserMedia({video:true, audio:true});
+    const stream = await navigator.mediaDevices.getUserMedia(constraints);
     t.add_cleanup(() => stream.getTracks().forEach(tr => tr.stop()));
     const recorder = new MediaRecorder(stream);
 
@@ -33,7 +33,19 @@
       combinedSize += data.size;
     }
     recorder.stop();
-  }, "MediaRecorder Blob timecode for first chunk must be 0 and monotonically increasing");
+  }
+
+  promise_test(async t => {
+    await testBlobTimecode(t, {video:true});
+  }, "MediaRecorder Blob timecode for first chunk must be 0 and monotonically increasing for video-only");
+
+  promise_test(async t => {
+    await testBlobTimecode(t, {audio:true});
+  }, "MediaRecorder Blob timecode for first chunk must be 0 and monotonically increasing for audio-only");
+
+  promise_test(async t => {
+    await testBlobTimecode(t, {video:true, audio:true});
+  }, "MediaRecorder Blob timecode for first chunk must be 0 and monotonically increasing for audio/video");
 
 </script>
 </body>
diff --git a/mediacapture-record/MediaRecorder-stop.html b/mediacapture-record/MediaRecorder-stop.html
@@ -111,6 +111,28 @@
         assertSequenceIn(events, ["start", "dataavailable", "stop"]);
     }, "MediaRecorder will stop recording and fire a stop event when stop() is called");
 
+    promise_test(async t => {
+        if (!isMimetypeSupported(mimeType, t)) {
+          return;
+        }
+
+        const {stream: audio} = createAudioStream(t);
+        const recorder = new MediaRecorder(audio, {mimeType});
+        const events = recordEvents(recorder,
+            ["start", "stop", "dataavailable", "pause", "resume", "error"]);
+        recorder.start();
+        assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
+        recorder.stop();
+        assert_equals(recorder.state, "inactive", "MediaRecorder state should be inactive immediately following stop() call");
+
+        const event = await new Promise(r => recorder.onstop = r);
+        assert_equals(event.type, "stop", "the event type should be stop");
+        assert_true(event.isTrusted, "isTrusted should be true when the event is created by C++");
+        assert_equals(recorder.state, "inactive", "MediaRecorder is inactive after stop event");
+
+        assertSequenceIn(events, ["start", "dataavailable", "stop"]);
+    }, "MediaRecorder will stop recording and fire a stop event when stop() is called for audio-only streams");
+
     promise_test(async t => {
         if (!isMimetypeSupported(mimeType, t)) {
           return;
