MediaStreamTrack-iframe-transfer.https.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:
- /mediacapture-streams/MediaStreamTrack-iframe-transfer.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>MediaStreamTrack transfer to iframe</title>

<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>

promise_test(async () => {

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

  await test_driver.bless('getDisplayMedia');

  const stream = await navigator.mediaDevices.getDisplayMedia({video: true});

  const track = stream.getVideoTracks()[0];

  const iframeLoaded = new Promise((resolve) => {iframe.onload = resolve});

  iframe.src = "support/iframe-MediaStreamTrack-transfer.html";

  document.body.appendChild(iframe);

  await iframeLoaded;

  const nextMessage = new Promise((resolve) => {

    window.onmessage = resolve

});

  assert_not_equals(track.readyState, "ended");

  iframe.contentWindow.postMessage(track);

  assert_equals(track.readyState, "ended");

  const message = await nextMessage;

  assert_not_equals(message.data.result, 'Failure', 'Failed: ' + message.data.error);

});

</script>