MediaStreamTrack-applyConstraints-fast.html

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This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /mediacapture-image/MediaStreamTrack-applyConstraints-fast.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

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

<body>

<canvas id='canvas' width=10 height=10></canvas>

</body>

<script>

// This test verifies that MediaStreamTrack.applyConstraints() exists and that,

// when called with no parameters, returns a Promise that is resolved. This

// might not make sense: https://github.com/w3c/mediacapture-main/issues/438 .

// Other tests go deeper.

promise_test(function(t) {

  var canvas = document.getElementById('canvas');

  var context = canvas.getContext("2d");

  context.fillStyle = "red";

  context.fillRect(0, 0, 10, 10);

  var stream = canvas.captureStream();

  assert_equals(stream.getAudioTracks().length, 0);

  assert_equals(stream.getVideoTracks().length, 1);

  var videoTrack = stream.getVideoTracks()[0];

  return videoTrack.applyConstraints();

}, 'MediaStreamTrack.applyConstraints()');

// This test verifies that MediaStreamTrack.applyConstraints() exists and that,

// when called with an empty advanced constraint set, returns a Promise that is

// resolved.

promise_test(function(t) {

  var canvas = document.getElementById('canvas');

  var context = canvas.getContext("2d");

  context.fillStyle = "red";

  context.fillRect(0, 0, 10, 10);

  var stream = canvas.captureStream();

  assert_equals(stream.getAudioTracks().length, 0);

  assert_equals(stream.getVideoTracks().length, 1);

  var videoTrack = stream.getVideoTracks()[0];

  return videoTrack.applyConstraints({advanced: []});

}, 'MediaStreamTrack.applyConstraints({advanced: []})');

// This test verifies that applyConstraints() rejects the returned Promise if

// passed a non-supported image-capture constraint (https://crbug.com/711694).

promise_test(async function(t) {

  var canvas = document.getElementById('canvas');

  var context = canvas.getContext("2d");

  context.fillStyle = "red";

  context.fillRect(0, 0, 10, 10);

  var stream = canvas.captureStream();

  var videoTrack = stream.getVideoTracks()[0];

  // Use e.g. |torch| as an example of unsupported constraint.

  assert_false("torch" in videoTrack.getCapabilities());

  try {

    await videoTrack.applyConstraints({torch: {exact: true}});

  } catch (error) {

    assert_equals(error.name, 'OverconstrainedError');

    assert_equals(error.constraint, 'torch');

    return;

  assert_unreached('expected applyConstraints to reject');

}, 'MediaStreamTrack.applyConstraints() with unsupported constraint');

</script>