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<!DOCTYPE html>
<html>
<script src="../../resources/js-test.js"></script>
<body>
<script id="myWorker" type="text/worker">
var setWidth = Math.pow(2, 31);
var setHeight = Math.pow(2, 31);
self.onmessage = function(e) {
var canvas1 = new OffscreenCanvas(setWidth, setHeight);
self.postMessage({version:'canvas1', width:canvas1.width, height:canvas1.height});
var canvas2 = new OffscreenCanvas(null, null);
self.postMessage({version:'canvas2', width:canvas2.width, height:canvas2.height});
};
</script>
<script>
jsTestIsAsync = true;
description("Tests that the OffscreenCanvas can handle invalid arguments on a worker");
var width;
var height;
var setWidth = Math.pow(2, 31);
var setHeight = Math.pow(2, 31);
function makeWorker(script) {
var blob = new Blob([script]);
return new Worker(URL.createObjectURL(blob));
}
function handleMessageFromWorker(msg) {
width = msg.data.width;
height = msg.data.height;
switch (msg.data.version) {
case 'canvas1':
shouldBe('width', 'setWidth-1');
shouldBe('height', 'setHeight-1');
break;
case 'canvas2':
shouldBe('width', '0');
shouldBe('height', '0');
finishJSTest();
break;
default:
testFailed("Unexpected failure");
break;
}
}
var worker = makeWorker(document.getElementById('myWorker').textContent);
worker.addEventListener('message', handleMessageFromWorker);
worker.postMessage("");
</script>
</body>
</html>
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