gecko-dev/dom/console/tests/test_console_binding.html

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HTML

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Test Console binding</title>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<script type="application/javascript">
function consoleListener() {
SpecialPowers.addObserver(this, "console-api-log-event");
}
var order = 0;
consoleListener.prototype = {
observe: function(aSubject, aTopic, aData) {
if (aTopic == "console-api-log-event") {
var obj = aSubject.wrappedJSObject;
if (order+1 == parseInt(obj.arguments[0])) {
ok(true, "Message received: " + obj.arguments[0]);
order++;
}
if (order == 3) {
SpecialPowers.removeObserver(this, "console-api-log-event");
SimpleTest.finish();
return;
}
}
}
}
var cl = new consoleListener();
SimpleTest.waitForExplicitFinish();
[1,2,3].forEach(console.log);
</script>
</body>
</html>