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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<canvas id='canvas' width=10 height=10/>
</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({advanced : [ {torch : 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>
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