michael@0: onmessage = function(evt) {
michael@0:   postMessage(postMessage('ignore') == undefined);
michael@0: 
michael@0:   var id = setInterval(function() {}, 200);
michael@0:   postMessage(clearInterval(id) == undefined);
michael@0: 
michael@0:   id = setTimeout(function() {}, 200);
michael@0:   postMessage(clearTimeout(id) == undefined);
michael@0: 
michael@0:   postMessage(dump(42) == undefined);
michael@0: 
michael@0:   postMessage('finished');
michael@0: }