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<head>
<title>Test attributeChanged callback is called if custom element attribute value is changed</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');
    proto.attributeChangedCallbackCalledCounter = 0;
    customElement.setAttribute('class', 'someClass2');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
}, 'Test attributeChanged callback is called if attribute value is changed by method ' +
    'setAttribute(). The custom element is created via constructor');


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

    doc.body.innerHTML = '<x-b id="x-b" class="oldValue"></x-b>';
    var customElement = doc.querySelector('#x-b');
    customElement.setAttribute('class', 'newValue');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'oldValue', 'newValue'],
        'Unexpected callback attributeChanged arguments');
}, 'Test attributeChanged callback arguments if attribute value is changed by method ' +
    'setAttribute(). The custom element is created via innerHTML property');


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

    customElement.setAttribute('class', 'someClass');
    proto.attributeChangedCallbackCalledCounter = 0;
    customElement.classList.add('someClass3');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
}, 'Test attributeChanged callback is called if attribute value is changed by method ' +
    'classList.add(). The custom element is created via constructor');


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

    doc.body.innerHTML = '<x-d id="x-d" class="oldValue"></x-d>';
    var customElement = doc.querySelector('#x-d');
    customElement.classList.add('newestValue');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'oldValue', 'oldValue newestValue'],
        'Unexpected callback attributeChanged arguments');
}, 'Test attributeChanged callback arguments if attribute value is changed by method ' +
    'classList.add(). The custom element is created via innerHTML property');


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

    customElement.setAttribute('class', 'someClass');
    proto.attributeChangedCallbackCalledCounter = 0;
    customElement.id = 'someId';
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
}, 'Test attributeChanged callback is called if attribute value is changed as property. ' +
    'The custom element is created via constructor');


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

    doc.body.innerHTML = '<x-f id="x-f" class="oldValue"></x-f>';
    var customElement = doc.querySelector('#x-f');
    customElement.className = 'lastValue';
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'oldValue', 'lastValue'],
        'Unexpected callback attributeChanged arguments');
}, 'Test attributeChanged callback arguments if attribute value is changed as property. ' +
    'The custom element is created via innerHTML property');


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

    customElement.setAttribute('class', 'someClass someSuperClass');
    proto.attributeChangedCallbackCalledCounter = 0;
    customElement.classList.toggle('someClass');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
}, 'Test attributeChanged callback is called if attribute value is changed by classList.toggle(). ' +
    'The custom element is created via constructor');


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

    doc.body.innerHTML = '<x-h id="x-h" class="oldValue lastValue"></x-h>';
    var customElement = doc.querySelector('#x-h');
    customElement.classList.toggle('lastValue');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'oldValue lastValue', 'oldValue'],
        'Unexpected callback attributeChanged arguments');
}, 'Test attributeChanged callback arguments if attribute value is changed by classList.toggle(). ' +
    'The custom element is created via innerHTML property');


test(function() {
    var doc = newHTMLDocument();
    doc.body.innerHTML = '<x-i id="x-i" class="oldValue"></x-i>';
    var customElement = doc.querySelector('#x-i');
    customElement.setAttribute('class', 'newValue');
    customElement.setAttribute('class', 'newestValue');

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

    assert_equals(proto.attributeChangedCallbackCalledCounter, 0,
        'Callback attributeChanged should not be called');

    customElement.setAttribute('class', 'rightValue');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should not be called');
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'newestValue', 'rightValue'],
        'Unexpected callback attributeChanged arguments');
}, 'Test attributeChanged callback is not called if custom element is not registered');


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', 'firstValue');
    customElement.setAttribute('class', 'secondValue');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 2, 'Callback ' +
        'attributeChanged should be called after call to setAttribute()');

    customElement.classList.add('someClass3');
    assert_equals(proto.attributeChangedCallbackCalledCounter, 3, 'Callback ' +
        'attributeChanged should be called after call to classList.add()');

    customElement.id = 'someId';
    assert_equals(proto.attributeChangedCallbackCalledCounter, 4, 'Callback ' +
        'attributeChanged should be called after changing attribute as property');
}, 'Test attributeChanged callback is called if attribute value is changed. ' +
    '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', 'firstValue');
    customElement.setAttribute('class', 'secondValue');
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'firstValue', 'secondValue'],
        'Unexpected callback attributeChanged arguments after call to setAttribute()');

    customElement.classList.add('newestValue');
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'secondValue', 'secondValue newestValue'],
        'Unexpected callback attributeChanged arguments after call to classList.add()');

    customElement.className = 'lastValue';
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'secondValue newestValue', 'lastValue'],
        'Unexpected callback attributeChanged arguments after changing attribute as property');
}, 'Test attributeChanged callback arguments if attribute value is changed. ' +
    'The document has browsing context');


testInIFrame('../../resources/x-element.html', function(doc) {
    var customElement = doc.querySelector('#x-element');
    customElement.setAttribute('class', 'firstValue');
    customElement.setAttribute('class', 'secondValue');

    var proto = newHTMLElementPrototype();
    doc.registerElement('x-element', {prototype: proto});
    customElement.setAttribute('class', 'thirdValue');

    assert_equals(proto.attributeChangedCallbackCalledCounter, 1,
        'Callback attributeChanged should be called');
    assert_array_equals(proto.attributeChangedCallbackArgs,
        ['class', 'secondValue', 'thirdValue'],
        'Unexpected callback attributeChanged arguments after setAttribute() call');
}, 'Test attributeChanged callback is not called if custom element is not registered. ' +
    'The document has browsing context');
</script>
</body>
</html>