src/third_party/web_platform_tests/custom-elements/custom-element-lifecycle/types-of-callbacks/attribute-changed-callback-set-attribute-test.html - cobalt - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <title>Test attributeChanged callback is called if custom element attribute value is set</title>
 <meta name="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
 <meta name="author" title="Aleksei Yu. Semenov" href="mailto:a.semenov@unipro.ru">
 <meta name="assert" content="attributeChanged callback ... must be enqueued whenever custom element's attribute is added, changed or removed.">
 <link rel="help" href="http://www.w3.org/TR/custom-elements/#types-of-callbacks">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="../../testcommon.js"></script>
 <link rel="stylesheet" href="/resources/testharness.css">
 </head>
 <body>
 <div id="log"></div>
 <script>
 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     var GeneratedConstructor = doc.registerElement('x-a', {prototype: proto});

     var customElement = new GeneratedConstructor();
     customElement.setAttribute('class', 'someClass');
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is called if attribute value is set by method ' +
     'setAttribute(). The custom element is created via constructor.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     var GeneratedConstructor = doc.registerElement('x-b', {prototype: proto});

     var customElement = new GeneratedConstructor();
     customElement.setAttribute('class', 'someClass');
     assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
         'Unexpected callback attributeChanged arguments');
 }, 'Test attributeChanged callback arguments if attribute value is set by method ' +
     'setAttribute(). The custom element is created via constructor.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     var GeneratedConstructor = doc.registerElement('x-c', {prototype: proto});

     var customElement = new GeneratedConstructor();
     customElement.classList.add('someClass');
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is called if attribute value is set by method ' +
     'classList.add(). The custom element is created via constructor.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     var GeneratedConstructor = doc.registerElement('x-d', {prototype: proto});

     var customElement = new GeneratedConstructor();
     customElement.classList.add('someClass');
     assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
         'Unexpected callback attributeChanged arguments');
 }, 'Test attributeChanged callback arguments if attribute value is set by method ' +
     'classList.add(). The custom element is created via constructor.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     var GeneratedConstructor = doc.registerElement('x-e', {prototype: proto});

     var customElement = new GeneratedConstructor();
     customElement.classList.toggle('someClass');
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is called if attribute value is set by method ' +
     'classList.toggle(). The custom element is created via constructor.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     var GeneratedConstructor = doc.registerElement('x-f', {prototype: proto});

     var customElement = new GeneratedConstructor();
     customElement.classList.toggle('someClass');
     assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
         'Unexpected callback attributeChanged arguments');
 }, 'Test attributeChanged callback arguments if attribute value is set by method ' +
     'classList.toggle(). The custom element is created via constructor.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     var GeneratedConstructor = doc.registerElement('x-g', {prototype: proto});

     var customElement = new GeneratedConstructor();
     customElement.className = 'someClass';
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is called if attribute value is set as property. ' +
     'The custom element is created via constructor.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     var GeneratedConstructor = doc.registerElement('x-h', {prototype: proto});

     var customElement = new GeneratedConstructor();
     customElement.className = 'someClass';
     assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
         'Unexpected callback attributeChanged arguments');
 }, 'Test attributeChanged callback arguments if attribute value is set as property. '+
     'The custom element is created via constructor.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     doc.registerElement('x-i', {prototype: proto});

     doc.body.innerHTML = '<x-i id="x-i" class="theClass"></x-i>';
     assert_equals(proto.attributeChangedCallbackCalledCounter, 0,
         'Callback attributeChanged should not be called');
 }, 'Test attributeChanged callback is not called if attribute value is specified in HTML. '+
     'The custom element is created via innerHTML property.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     doc.registerElement('x-j', {prototype: proto});

     doc.body.innerHTML = '<x-j id="x-j" class="theClass"></x-j>';
     var customElement = doc.querySelector('#x-j');
     customElement.setAttribute('class', 'someClass');
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is called if attribute value is set by method setAttribute(). '+
     'The custom element is created via innerHTML property.');


 test(function() {
     var doc = newHTMLDocument();
     var proto = newHTMLElementPrototype();
     doc.registerElement('x-k', {prototype: proto});

     doc.body.innerHTML = '<x-k id="x-k"></x-k>';
     var customElement = doc.querySelector('#x-k');
     customElement.setAttribute('class', 'someClass');
     assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
         'Unexpected callback attributeChanged arguments');
 }, 'Test attributeChanged callback arguments if attribute value is set by method setAttribute(). '+
     'The custom element is created via innerHTML property.');


 test(function() {
     var doc = newHTMLDocument();

     doc.body.innerHTML = '<x-l id="x-l"></x-l>';
     var customElement = doc.querySelector('#x-l');
     // this call shouldn't invoke or enqueue the callback
     customElement.setAttribute('class', 'someClass');

     var proto = newHTMLElementPrototype();
     doc.registerElement('x-l', {prototype: proto});
     assert_equals(proto.attributeChangedCallbackCalledCounter, 0,
         'Callback attributeChanged should not be called');
     // this one should
     customElement.setAttribute('class', 'someClass2');
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is not called if attribute value of unresolved element '+
     'is set by method setAttribute().');


 test(function() {
     var doc = newHTMLDocument();
     HTML5_ELEMENTS.forEach(function(element) {
         var obj = doc.createElement(element);
         var proto = newCustomElementPrototype(obj.constructor.prototype);
         var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-1', {
             prototype: proto,
             extends: element
         });

         var customElement = new GeneratedConstructor();
         customElement.setAttribute('class', 'someClass');
         assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
             'Callback attributeChanged should be called');
     });
 }, 'Test attributeChanged callback of the custom element that extends some HTML element. ' +
     'Test that the callback is called');


 test(function() {
     var doc = newHTMLDocument();
     HTML5_ELEMENTS.forEach(function(element) {
         var obj = doc.createElement(element);
         var proto = newCustomElementPrototype(obj.constructor.prototype);
         var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-1-1', {
             prototype: proto,
             extends: element
         });

         var customElement = new GeneratedConstructor();
         customElement.classList.add('someClass');
         assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
             'Callback attributeChanged should be called');
     });
 }, 'Test attributeChanged callback is called if attribute is set by method classList.add(). '+
     'The custom element extends some HTML element.');


 test(function() {
     var doc = newHTMLDocument();
     HTML5_ELEMENTS.forEach(function(element) {
         var obj = doc.createElement(element);
         var proto = newCustomElementPrototype(obj.constructor.prototype);
         var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-2', {
             prototype: proto,
             extends: element
         });

         var customElement = new GeneratedConstructor();
         customElement.setAttribute('class', 'someClass');
         assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
             'Unexpected callback attributeChanged arguments');
     });
 }, 'Test attributeChanged callback arguments if attribute value is set by method setAttribute(). '+
     'The custom element extends some HTML element.');


 testInIFrame('../../resources/x-element.html', function(doc) {
     var proto = newHTMLElementPrototype();
     doc.registerElement('x-element', {prototype: proto});

     var customElement = doc.querySelector('#x-element');
     customElement.setAttribute('class', 'someClass');
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is called if attribute value is set by method setAttribute(). '+
     'The document has browsing context.');


 testInIFrame('../../resources/x-element.html', function(doc) {
     var proto = newHTMLElementPrototype();
     doc.registerElement('x-element', {prototype: proto});

     var customElement = doc.querySelector('#x-element');
     customElement.setAttribute('class', 'someClass');
     assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
         'Unexpected callback attributeChanged arguments');
 }, 'Test attributeChanged callback arguments if attribute value is set by method setAttribute(). '+
     'The document has browsing context.');


 testInIFrame('../../resources/x-element.html', function(doc) {
     var proto = newHTMLElementPrototype();
     doc.registerElement('x-element', {prototype: proto});

     var customElement = doc.querySelector('#x-element');
     customElement.classList.add('someClass');
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is called if attribute value is set by method classList.add(). '+
     'The document has browsing context.');


 testInIFrame('../../resources/x-element.html', function(doc) {
     var proto = newHTMLElementPrototype();
     doc.registerElement('x-element', {prototype: proto});

     var customElement = doc.querySelector('#x-element');
     customElement.classList.add('someClass');
     assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
         'Unexpected callback attributeChanged arguments');
 }, 'Test attributeChanged callback arguments if attribute value is set by method classList.add(). '+
     'The document has browsing context.');


 testInIFrame('../../resources/x-element.html', function(doc) {
     var customElement = doc.querySelector('#x-element');
     // this call shouldn't invoke or enqueue the callback
     customElement.setAttribute('name', 'someName');

     var proto = newHTMLElementPrototype();
     doc.registerElement('x-element', {prototype: proto});
     assert_equals(proto.attributeChangedCallbackCalledCounter, 0,
         'Callback attributeChanged should not be called');
     // this one should
     customElement.setAttribute('class', 'someClass');
     assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
         'Callback attributeChanged should be called');
 }, 'Test attributeChanged callback is not called if attribute value of unresolved element '+
     'is set by method setAttribute(). The document has browsing context.');


 testInIFrame('../../resources/x-element.html', function(doc) {
     HTML5_ELEMENTS.forEach(function(element) {
         var obj = doc.createElement(element);
         var proto = newCustomElementPrototype(obj.constructor.prototype);
         var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-1', {
             prototype: proto,
             extends: element
         });

         var customElement = new GeneratedConstructor();
         customElement.setAttribute('class', 'someClass');
         assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
             'Callback attributeChanged should be called');
     });
 }, 'Test attributeChanged callback is called if attribute value is set by method setAttribute(). '+
     'The document has browsing context. The custom element extends some HTML element.');


 testInIFrame('../../resources/x-element.html', function(doc) {
     HTML5_ELEMENTS.forEach(function(element) {
         var obj = doc.createElement(element);
         var proto = newCustomElementPrototype(obj.constructor.prototype);
         var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-2', {
             prototype: proto,
             extends: element
         });

         var customElement = new GeneratedConstructor();
         customElement.setAttribute('class', 'someClass');
         assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
             'Unexpected callback attributeChanged arguments');
     });
 }, 'Test attributeChanged callback arguments if attribute value is set by method setAttribute(). '+
     'The document has browsing context. The custom element extends some HTML element.');
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>Test attributeChanged callback is called if custom element attribute value is set</title>
	<meta name="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
	<meta name="author" title="Aleksei Yu. Semenov" href="mailto:a.semenov@unipro.ru">
	<meta name="assert" content="attributeChanged callback ... must be enqueued whenever custom element's attribute is added, changed or removed.">
	<link rel="help" href="http://www.w3.org/TR/custom-elements/#types-of-callbacks">
	<script src="/resources/testharness.js"></script>
	<script src="/resources/testharnessreport.js"></script>
	<script src="../../testcommon.js"></script>
	<link rel="stylesheet" href="/resources/testharness.css">
	</head>
	<body>
	<div id="log"></div>
	<script>
	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	var GeneratedConstructor = doc.registerElement('x-a', {prototype: proto});

	var customElement = new GeneratedConstructor();
	customElement.setAttribute('class', 'someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is called if attribute value is set by method ' +
	'setAttribute(). The custom element is created via constructor.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	var GeneratedConstructor = doc.registerElement('x-b', {prototype: proto});

	var customElement = new GeneratedConstructor();
	customElement.setAttribute('class', 'someClass');
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	}, 'Test attributeChanged callback arguments if attribute value is set by method ' +
	'setAttribute(). The custom element is created via constructor.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	var GeneratedConstructor = doc.registerElement('x-c', {prototype: proto});

	var customElement = new GeneratedConstructor();
	customElement.classList.add('someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is called if attribute value is set by method ' +
	'classList.add(). The custom element is created via constructor.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	var GeneratedConstructor = doc.registerElement('x-d', {prototype: proto});

	var customElement = new GeneratedConstructor();
	customElement.classList.add('someClass');
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	}, 'Test attributeChanged callback arguments if attribute value is set by method ' +
	'classList.add(). The custom element is created via constructor.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	var GeneratedConstructor = doc.registerElement('x-e', {prototype: proto});

	var customElement = new GeneratedConstructor();
	customElement.classList.toggle('someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is called if attribute value is set by method ' +
	'classList.toggle(). The custom element is created via constructor.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	var GeneratedConstructor = doc.registerElement('x-f', {prototype: proto});

	var customElement = new GeneratedConstructor();
	customElement.classList.toggle('someClass');
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	}, 'Test attributeChanged callback arguments if attribute value is set by method ' +
	'classList.toggle(). The custom element is created via constructor.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	var GeneratedConstructor = doc.registerElement('x-g', {prototype: proto});

	var customElement = new GeneratedConstructor();
	customElement.className = 'someClass';
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is called if attribute value is set as property. ' +
	'The custom element is created via constructor.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	var GeneratedConstructor = doc.registerElement('x-h', {prototype: proto});

	var customElement = new GeneratedConstructor();
	customElement.className = 'someClass';
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	}, 'Test attributeChanged callback arguments if attribute value is set as property. '+
	'The custom element is created via constructor.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	doc.registerElement('x-i', {prototype: proto});

	doc.body.innerHTML = '<x-i id="x-i" class="theClass"></x-i>';
	assert_equals(proto.attributeChangedCallbackCalledCounter, 0,
	'Callback attributeChanged should not be called');
	}, 'Test attributeChanged callback is not called if attribute value is specified in HTML. '+
	'The custom element is created via innerHTML property.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	doc.registerElement('x-j', {prototype: proto});

	doc.body.innerHTML = '<x-j id="x-j" class="theClass"></x-j>';
	var customElement = doc.querySelector('#x-j');
	customElement.setAttribute('class', 'someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is called if attribute value is set by method setAttribute(). '+
	'The custom element is created via innerHTML property.');


	test(function() {
	var doc = newHTMLDocument();
	var proto = newHTMLElementPrototype();
	doc.registerElement('x-k', {prototype: proto});

	doc.body.innerHTML = '<x-k id="x-k"></x-k>';
	var customElement = doc.querySelector('#x-k');
	customElement.setAttribute('class', 'someClass');
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	}, 'Test attributeChanged callback arguments if attribute value is set by method setAttribute(). '+
	'The custom element is created via innerHTML property.');


	test(function() {
	var doc = newHTMLDocument();

	doc.body.innerHTML = '<x-l id="x-l"></x-l>';
	var customElement = doc.querySelector('#x-l');
	// this call shouldn't invoke or enqueue the callback
	customElement.setAttribute('class', 'someClass');

	var proto = newHTMLElementPrototype();
	doc.registerElement('x-l', {prototype: proto});
	assert_equals(proto.attributeChangedCallbackCalledCounter, 0,
	'Callback attributeChanged should not be called');
	// this one should
	customElement.setAttribute('class', 'someClass2');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is not called if attribute value of unresolved element '+
	'is set by method setAttribute().');


	test(function() {
	var doc = newHTMLDocument();
	HTML5_ELEMENTS.forEach(function(element) {
	var obj = doc.createElement(element);
	var proto = newCustomElementPrototype(obj.constructor.prototype);
	var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-1', {
	prototype: proto,
	extends: element
	});

	var customElement = new GeneratedConstructor();
	customElement.setAttribute('class', 'someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	});
	}, 'Test attributeChanged callback of the custom element that extends some HTML element. ' +
	'Test that the callback is called');


	test(function() {
	var doc = newHTMLDocument();
	HTML5_ELEMENTS.forEach(function(element) {
	var obj = doc.createElement(element);
	var proto = newCustomElementPrototype(obj.constructor.prototype);
	var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-1-1', {
	prototype: proto,
	extends: element
	});

	var customElement = new GeneratedConstructor();
	customElement.classList.add('someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	});
	}, 'Test attributeChanged callback is called if attribute is set by method classList.add(). '+
	'The custom element extends some HTML element.');


	test(function() {
	var doc = newHTMLDocument();
	HTML5_ELEMENTS.forEach(function(element) {
	var obj = doc.createElement(element);
	var proto = newCustomElementPrototype(obj.constructor.prototype);
	var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-2', {
	prototype: proto,
	extends: element
	});

	var customElement = new GeneratedConstructor();
	customElement.setAttribute('class', 'someClass');
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	});
	}, 'Test attributeChanged callback arguments if attribute value is set by method setAttribute(). '+
	'The custom element extends some HTML element.');


	testInIFrame('../../resources/x-element.html', function(doc) {
	var proto = newHTMLElementPrototype();
	doc.registerElement('x-element', {prototype: proto});

	var customElement = doc.querySelector('#x-element');
	customElement.setAttribute('class', 'someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is called if attribute value is set by method setAttribute(). '+
	'The document has browsing context.');


	testInIFrame('../../resources/x-element.html', function(doc) {
	var proto = newHTMLElementPrototype();
	doc.registerElement('x-element', {prototype: proto});

	var customElement = doc.querySelector('#x-element');
	customElement.setAttribute('class', 'someClass');
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	}, 'Test attributeChanged callback arguments if attribute value is set by method setAttribute(). '+
	'The document has browsing context.');


	testInIFrame('../../resources/x-element.html', function(doc) {
	var proto = newHTMLElementPrototype();
	doc.registerElement('x-element', {prototype: proto});

	var customElement = doc.querySelector('#x-element');
	customElement.classList.add('someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is called if attribute value is set by method classList.add(). '+
	'The document has browsing context.');


	testInIFrame('../../resources/x-element.html', function(doc) {
	var proto = newHTMLElementPrototype();
	doc.registerElement('x-element', {prototype: proto});

	var customElement = doc.querySelector('#x-element');
	customElement.classList.add('someClass');
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	}, 'Test attributeChanged callback arguments if attribute value is set by method classList.add(). '+
	'The document has browsing context.');


	testInIFrame('../../resources/x-element.html', function(doc) {
	var customElement = doc.querySelector('#x-element');
	// this call shouldn't invoke or enqueue the callback
	customElement.setAttribute('name', 'someName');

	var proto = newHTMLElementPrototype();
	doc.registerElement('x-element', {prototype: proto});
	assert_equals(proto.attributeChangedCallbackCalledCounter, 0,
	'Callback attributeChanged should not be called');
	// this one should
	customElement.setAttribute('class', 'someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	}, 'Test attributeChanged callback is not called if attribute value of unresolved element '+
	'is set by method setAttribute(). The document has browsing context.');


	testInIFrame('../../resources/x-element.html', function(doc) {
	HTML5_ELEMENTS.forEach(function(element) {
	var obj = doc.createElement(element);
	var proto = newCustomElementPrototype(obj.constructor.prototype);
	var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-1', {
	prototype: proto,
	extends: element
	});

	var customElement = new GeneratedConstructor();
	customElement.setAttribute('class', 'someClass');
	assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
	'Callback attributeChanged should be called');
	});
	}, 'Test attributeChanged callback is called if attribute value is set by method setAttribute(). '+
	'The document has browsing context. The custom element extends some HTML element.');


	testInIFrame('../../resources/x-element.html', function(doc) {
	HTML5_ELEMENTS.forEach(function(element) {
	var obj = doc.createElement(element);
	var proto = newCustomElementPrototype(obj.constructor.prototype);
	var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-2', {
	prototype: proto,
	extends: element
	});

	var customElement = new GeneratedConstructor();
	customElement.setAttribute('class', 'someClass');
	assert_array_equals(proto.attributeChangedCallbackArgs, ['class', null, 'someClass'],
	'Unexpected callback attributeChanged arguments');
	});
	}, 'Test attributeChanged callback arguments if attribute value is set by method setAttribute(). '+
	'The document has browsing context. The custom element extends some HTML element.');
	</script>
	</body>
	</html>