usermedia-dynamic-constraints.tentative.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:
- /html/semantics/permission-element/usermedia/usermedia-dynamic-constraints.tentative.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>HTMLUserMediaElement Test: dynamic constraint updates</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>

<body>

<script>

promise_test(async (t) => {

  const usermedia = document.createElement('usermedia');

  document.body.appendChild(usermedia);

  // Set initial constraints (video only)

  usermedia.setConstraints({video: true, audio: false});

  // Dynamically update constraints to audio only

  usermedia.setConstraints({video: false, audio: true});

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

    usermedia.onstream = resolve;

});

  await Promise.all([

    test_driver.set_permission({name: 'camera'}, 'granted'),

    test_driver.set_permission({name: 'microphone'}, 'granted')

]);

  // Wait until the element is clickable.

  await new Promise(resolve => t.step_timeout(resolve, 600));

  await test_driver.click(usermedia);

  const e = await stream_promise;

  assert_true(e.target.stream instanceof MediaStream);

  assert_equals(e.target.stream.getVideoTracks().length, 1, "There should be 1 video track as subsequent setConstraints are ignored");

  assert_equals(e.target.stream.getAudioTracks().length, 0, "There should be no audio tracks as subsequent setConstraints are ignored");

}, "A usermedia element respects the first constraints set and ignores subsequent calls");

</script>

</body>