chromium/third_party/blink/web_tests/external/wpt/mediacapture-record/MediaRecorder-peerconnection-no-sink.https.html

<!doctype html>
<html>
<meta name="timeout" content="long">

<head>
  <title>MediaRecorder peer connection</title>
  <link rel="help"
        href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-mimeType">
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <script src="/resources/testdriver.js"></script>
  <script src="/resources/testdriver-vendor.js"></script>
  <script src="../mediacapture-streams/permission-helper.js"></script>
  <script src="utils/peerconnection.js"></script>
</head>

<body>
  <script>

promise_setup(async () => {
  const t = {add_cleanup: add_completion_callback};
  const [, pc, stream] = await startConnection(t, true, true);
  const [audio] = stream.getAudioTracks();
  const [video] = stream.getVideoTracks();

  for (const kinds of [{ audio }, { video }, { audio, video }]) {
    const tag = `${JSON.stringify(kinds)}`;
    const stream = new MediaStream([kinds.audio, kinds.video].filter(n => n));

    promise_test(async t => {
      const recorder = new MediaRecorder(stream);
      recorder.start(200);
      let combinedSize = 0;
      // Wait for a small amount of data to appear. Kept small for mobile tests
      while (combinedSize < 2000) {
        const event = await Promise.race([
          new Promise(r => recorder.ondataavailable = r),
          new Promise(r => t.step_timeout(r, 5000))
        ]);
        assert_not_equals(event, undefined, 'ondataavailable should have fired');
        combinedSize += event.data.size;
      }
      recorder.stop();
    }, `MediaRecorder records from PeerConnection without sinks, ${tag}`);
  }
});

  </script>
</body>

</html>