mediasource-worker-duration.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /media-source/dedicated-worker/mediasource-worker-duration.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<title>Test MediaSource-in-Worker duration updates before and after HAVE_METADATA</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="mediasource-message-util.js"></script>

<body>

<script>

function awaitDuration(t, video, worker, requestingMessage, expectedDuration) {

  let durationAwaiter = t.step_func(() => {

    if ((!Number.isNaN(expectedDuration) && video.duration === expectedDuration) ||

        (Number.isNaN(expectedDuration) && Number.isNaN(video.duration))) {

      worker.postMessage({ subject: messageSubject.ACK_VERIFIED, info: requestingMessage });

      return;

    // Otherwise, wait for one or more 'durationchange' events to see if video

    // eventually has the expectedDuration.

    video.addEventListener('durationchange', durationAwaiter, { once: true });

});

  durationAwaiter();

async_test(t => {

  // Fail fast if MSE-in-Workers is not supported.

  assert_true(MediaSource.hasOwnProperty("canConstructInDedicatedWorker"), "MediaSource hasOwnProperty 'canConstructInDedicatedWorker'");

  assert_true(MediaSource.canConstructInDedicatedWorker, "MediaSource.canConstructInDedicatedWorker");

  const video = document.createElement("video");

  document.body.appendChild(video);

  video.onerror = t.unreached_func("video element error");

  video.onended = t.unreached_func("video element ended");

  assert_equals(video.duration, NaN, "initial video duration before attachment should be NaN");

  assert_equals(video.readyState, HTMLMediaElement.HAVE_NOTHING, "initial video readyState before attachment should be HAVE_NOTHING");

  let worker = new Worker("mediasource-worker-duration.js");

  worker.onerror = t.step_func(e => {

    assert_unreached("worker error: [" + e.filename + ":" + e.lineno + ":" + e.colno + ":" + e.error + ":" + e.message + "]");

});

  worker.onmessage = t.step_func(e => {

    let subject = e.data.subject;

    assert_true(subject !== undefined, "message must have a subject field");

    switch (subject) {

      case messageSubject.ERROR:

        assert_unreached("Worker error: " + e.data.info);

        break;

      case messageSubject.HANDLE:

        const handle = e.data.info;

        assert_equals(video.duration, NaN, "initial video duration before attachment should still be NaN");

        assert_equals(video.readyState, HTMLMediaElement.HAVE_NOTHING,

                      "initial video readyState before attachment should still be HAVE_NOTHING");

        video.srcObject = handle;

        break;

      case messageSubject.VERIFY_DURATION:

        assert_equals(video.duration, e.data.info, "duration should match expectation");

        worker.postMessage({ subject: messageSubject.ACK_VERIFIED, info: e.data });

        break;

      case messageSubject.AWAIT_DURATION:

        awaitDuration(t, video, worker, e.data, e.data.info);

        break;

      case messageSubject.VERIFY_HAVE_NOTHING:

        assert_equals(video.readyState, HTMLMediaElement.HAVE_NOTHING, "readyState should match expectation");

        worker.postMessage({ subject: messageSubject.ACK_VERIFIED, info: e.data });

        break;

      case messageSubject.VERIFY_AT_LEAST_HAVE_METADATA:

        assert_greater_than_equal(video.readyState, HTMLMediaElement.HAVE_METADATA, "readyState should match expectation");

        worker.postMessage({ subject: messageSubject.ACK_VERIFIED, info: e.data });

        break;

      case messageSubject.WORKER_DONE:

        // This test is a worker-driven set of verifications, and it will send

        // this message when it is complete. See comment in the worker script

        // that describes the phases of this test case.

        assert_not_equals(video.srcObject, null, "test should at least have set srcObject.");

        t.done();

        break;

      default:

        assert_unreached("Unexpected message subject: " + subject);

});

}, "Test worker MediaSource duration updates before and after HAVE_METADATA");

</script>

</body>

</html>