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Test Info:
<!DOCTYPE html>↩
<html class="reftest-wait">↩
<head>↩
</head>↩
<body>↩
<canvas id="canvas"></canvas>↩
<script type="text/javascript">↩
↩
function wait(ms) {↩
return new Promise(resolve => setTimeout(resolve, ms));↩
}↩
↩
function boom() {↩
let canvas = document.getElementById("canvas");↩
let ctx = canvas.getContext('2d');↩
ctx.fillRect(10, 10, 100, 100);↩
let stream = canvas.captureStream();↩
let rec = new MediaRecorder(stream);↩
// At the time of fixing this bug onstop would fire, but this may change in↩
// future. As such defensively listen for onerror too to prevent this test↩
// timing out.↩
let stoppedPromise = new Promise(y => (rec.onstop = y,↩
rec.onerror = e => y));↩
rec.onstart = () => {↩
// Remove the video track from the stream we're recording↩
stream.removeTrack(stream.getTracks()[0]);↩
// Recorder should stop or error in response to the above↩
return stoppedPromise↩
.then(() => {↩
// Little wait to help get bad writes if they're going to happen↩
wait(100)↩
.then(() => {↩
// Didn't crash, finish↩
document.documentElement.removeAttribute("class");↩
});↩
});↩
};↩
rec.start();↩
}↩
↩
window.onload = boom;↩
↩
</script>↩
</body>↩
</html>↩