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<!DOCTYPE html>
<html>
<head>
<title>If prototype is already an interface prototype object, Document.registerElement() throws a NotSupportedError</title>
<meta name="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
<meta name="assert" content="If PROTOTYPE is already an interface prototype object for any interface object, throw a NotSupportedError and stop">
<link rel="help" href="http://www.w3.org/TR/custom-elements/#instantiating-custom-elements">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../testcommon.js"></script>
</head>
<body>
<div id="log"></div>
<script>
test(function() {
var doc = newHTMLDocument();
HTML5_ELEMENTS.forEach(function(tagName) {
var obj = doc.createElement(tagName);
var name = 'x-a-' + tagName;
assert_throws('NotSupportedError', function() {
doc.registerElement(name, {prototype: obj.constructor.prototype});
}, 'Exception should be thrown in case of attempt to register element ' +
'if prototype is already an interface prototype object (' + name + ')');
});
}, 'Test Document.registerElement() throws NotSupportedError ' +
'if prototype is already an interface prototype object');
test(function() {
var doc = newHTMLDocument();
var proto = Object.create(HTMLElement.prototype);
doc.registerElement('x-b', {
prototype: proto
});
assert_throws('NotSupportedError', function() {
doc.registerElement('x-b', {
prototype: proto
});
}, 'Exception should be thrown if registring custom element type with already used prototype');
}, 'Test Document.registerElement() throws NotSupportedError ' +
'if prototype is already used for another custom element type');
</script>
</body>
</html>
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