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+++ b/testing/web-platform/tests/custom-elements/v0/custom-element-lifecycle/types-of-callbacks/created-callback-invocation-test.html
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+<!DOCTYPE html>
+<html>
+<head>
+<title>Created callback of a custom element should be invoked after custom element instance is created and its definition is registered</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="CREATED callback is invoked after custom element instance is created and its definition is registered">
+<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>
+</head>
+<body>
+<div id="log"></div>
+<script>
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    var GeneratedConstructor = doc.registerElement('x-a', {prototype: proto});
+    assert_equals(proto.createdCallbackCalledCounter, 0,
+        'Callback created should not be called before element instance was created');
+    var customElement = new GeneratedConstructor();
+    assert_equals(proto.createdCallbackCalledCounter, 1,
+        'Callback created should be called after element instance was created');
+}, 'Test created callback when custom element is created by constructor');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-b', {prototype: proto});
+    assert_equals(proto.createdCallbackCalledCounter, 0,
+        'Callback created should not be called before element instance was created');
+    doc.body.innerHTML = '<x-b></x-b>';
+    assert_equals(proto.createdCallbackCalledCounter, 1,
+        'Callback created should be called after element instance was created');
+}, 'Test created callback when custom element is created in HTML');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-c', {prototype: proto});
+    assert_equals(proto.createdCallbackCalledCounter, 0,
+        'Callback created should not be called before element instance was created');
+    doc.body.innerHTML = '<div><x-c></x-c></div>';
+    assert_equals(proto.createdCallbackCalledCounter, 1,
+        'Callback created should be called after element instance was created');
+}, 'Test created callback when custom element is created in HTML as descendant of ' +
+    'another element');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-d', {prototype: proto});
+    assert_equals(proto.createdCallbackCalledCounter, 0,
+        'Callback created should not be called before element instance was created');
+    var customElement = doc.createElement('x-d');
+    assert_equals(proto.createdCallbackCalledCounter, 1,
+        'Callback created should be called after element instance was created');
+}, 'Test created callback when custom element is created by createElement');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+
+    doc.body.innerHTML = '<x-e></x-e>';
+    doc.registerElement('x-e', {prototype: proto});
+    assert_equals(proto.createdCallbackCalledCounter, 1,
+        'Callback created should be called after element instance was created');
+}, 'Test created callback when custom element is created in HTML before ' +
+    'registration of a custom element');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-f', {prototype: proto});
+    doc.body.innerHTML = '<x-f-unresolved id="x-f-unresolved"></x-f-unresolved>';
+    assert_equals(proto.createdCallbackCalledCounter, 0,
+        'Callback created should not be called if custom element is unresolved');
+
+    var customElement = doc.querySelector('#x-f-unresolved');
+    customElement.constructor.prototype = proto;
+    assert_equals(proto.createdCallbackCalledCounter, 0,
+        'Created callback should not be called if custom element is unresolved');
+}, 'Test created callback if custom element is unresolved.');
+
+
+testInIFrame('../../resources/x-element.html', function(doc) {
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-element', {prototype: proto});
+    assert_equals(proto.createdCallbackCalledCounter, 1, 'Callback created should be called');
+}, 'Test created callback is called after custom element is created and registered. ' +
+    'Document has browsing context');
+
+
+testInIFrame('../../resources/register-and-create-custom-element.html', function(doc) {
+    assert_equals(doc.querySelector('#log').textContent, 'Created callback was called',
+        'Callback created should be called');
+}, 'Test created callback is called after custom element is registered and created. ' +
+    'Document has browsing context');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    var customElement = doc.createElement('x-g');
+
+    doc.registerElement('x-g', {prototype: proto});
+    assert_equals(proto.createdCallbackCalledCounter, 1,
+        'Callback created should be called after registration of custom element');
+}, 'Test created callback when custom element is created by createElement '+
+    'before registration of a custom element');
+
+
+test(function(){
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    var GeneratedConstructor = doc.registerElement('x-h', {prototype: proto});
+
+    var customElement1 = new GeneratedConstructor();
+    assert_equals(proto.createdCallbackCalledCounter, 1, 'Callback created should be called');
+
+    var customElement2 = doc.createElement('x-h');
+    assert_equals(proto.createdCallbackCalledCounter, 2,
+        'Callback created should be called after element instance was created');
+
+    doc.body.innerHTML = '<x-h></x-h>';
+    assert_equals(proto.createdCallbackCalledCounter, 3,
+        'Callback created should be called after element instance was created');
+
+    doc.body.innerHTML = '<div><x-h></x-h></div>';
+    assert_equals(proto.createdCallbackCalledCounter, 4,
+        'Callback created should be called after element instance was created');
+}, 'Test created callback. Create several custom elements using different ways');
+
+
+testInIFrame('../../resources/x-element.html', function(doc) {
+    var proto = newHTMLElementPrototype();
+
+    var GeneratedConstructor = doc.registerElement('x-element', {prototype: proto});
+    assert_equals(proto.createdCallbackCalledCounter, 1,
+        'Callback created should be called for custom element in loaded document');
+
+    var customElement2 = new GeneratedConstructor();
+    assert_equals(proto.createdCallbackCalledCounter, 2,
+        'Callback created should be called after element instance was created');
+
+    var customElement3 = doc.createElement('x-element');
+    assert_equals(proto.createdCallbackCalledCounter, 3,
+        'Callback created should be called after element instance was created');
+
+    doc.body.innerHTML = '<x-element></x-element>';
+    assert_equals(proto.createdCallbackCalledCounter, 4,
+        'Callback created should be called after element instance was created');
+
+    doc.body.innerHTML = '<div><x-element></x-element></div>';
+    assert_equals(proto.createdCallbackCalledCounter, 5,
+        'Callback created should be called after element instance was created');
+}, 'Test created callback. Create several custom elements using different ways. ' +
+    'Document has browsing context');
+</script>
+</body>
+</html>