mozilla-central/testing/web-platform/tests/custom-elements/custom-element-reaction-queue.html

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<!DOCTYPE html>
<html>
<head>
<title>Custom Elements: Each element must have its own custom element reaction queue</title>
<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
<meta name="assert" content="Each element must have its own custom element reaction queue">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/custom-elements-helpers.js"></script>
</head>
<body>
<div id="log"></div>
<script>
test_with_window(function (contentWindow) {
const contentDocument = contentWindow.document;
contentDocument.write('<test-element id="first-element">');
contentDocument.write('<test-element id="second-element">');
const element1 = contentDocument.getElementById('first-element');
const element2 = contentDocument.getElementById('second-element');
assert_equals(Object.getPrototypeOf(element1), contentWindow.HTMLElement.prototype);
assert_equals(Object.getPrototypeOf(element2), contentWindow.HTMLElement.prototype);
let log = [];
class TestElement extends contentWindow.HTMLElement {
constructor() {
super();
log.push(create_constructor_log(this));
}
connectedCallback(...args) {
log.push(create_connected_callback_log(this, ...args));
}
attributeChangedCallback(...args) {
log.push(create_attribute_changed_callback_log(this, ...args));
}
static get observedAttributes() { return ['id']; }
}
contentWindow.customElements.define('test-element', TestElement);
assert_equals(Object.getPrototypeOf(element1), TestElement.prototype);
assert_equals(Object.getPrototypeOf(element2), TestElement.prototype);
assert_equals(log.length, 6);
assert_constructor_log_entry(log[0], element1);
assert_attribute_log_entry(log[1], {name: 'id', oldValue: null, newValue: 'first-element', namespace: null});
assert_connected_log_entry(log[2], element1);
assert_constructor_log_entry(log[3], element2);
assert_attribute_log_entry(log[4], {name: 'id', oldValue: null, newValue: 'second-element', namespace: null});
assert_connected_log_entry(log[5], element2);
}, 'Upgrading a custom element must invoke attributeChangedCallback and connectedCallback before start upgrading another element');
test_with_window(function (contentWindow) {
const contentDocument = contentWindow.document;
contentDocument.write('<test-element>');
const element = contentDocument.querySelector('test-element');
assert_equals(Object.getPrototypeOf(element), contentWindow.HTMLElement.prototype);
let log = [];
class TestElement extends contentWindow.HTMLElement {
constructor() {
super();
this.id = "foo";
this.setAttribute('id', 'foo');
this.removeAttribute('id');
this.style.fontSize = '10px';
log.push(create_constructor_log(this));
}
connectedCallback(...args) {
log.push(create_connected_callback_log(this, ...args));
}
attributeChangedCallback(...args) {
log.push(create_attribute_changed_callback_log(this, ...args));
}
static get observedAttributes() { return ['id', 'style']; }
}
contentWindow.customElements.define('test-element', TestElement);
assert_equals(Object.getPrototypeOf(element), TestElement.prototype);
assert_equals(log.length, 2);
assert_constructor_log_entry(log[0], element);
assert_connected_log_entry(log[1], element);
}, 'Upgrading a custom element must not invoke attributeChangedCallback for the attribute that is changed during upgrading');
test_with_window(function (contentWindow) {
const contentDocument = contentWindow.document;
contentDocument.write('<test-element id="first-element">');
contentDocument.write('<test-element id="second-element">');
const element1 = contentDocument.getElementById('first-element');
const element2 = contentDocument.getElementById('second-element');
assert_equals(Object.getPrototypeOf(element1), contentWindow.HTMLElement.prototype);
assert_equals(Object.getPrototypeOf(element2), contentWindow.HTMLElement.prototype);
let log = [];
class TestElement extends contentWindow.HTMLElement {
constructor() {
super();
log.push(create_constructor_log(this));
if (this == element1) {
element2.setAttribute('title', 'hi');
element2.removeAttribute('title');
element2.setAttribute('class', 'foo');
}
}
connectedCallback(...args) {
log.push(create_connected_callback_log(this, ...args));
}
attributeChangedCallback(...args) {
log.push(create_attribute_changed_callback_log(this, ...args));
}
static get observedAttributes() { return ['id', 'class', 'title']; }
}
contentWindow.customElements.define('test-element', TestElement);
assert_equals(Object.getPrototypeOf(element1), TestElement.prototype);
assert_equals(Object.getPrototypeOf(element2), TestElement.prototype);
assert_equals(log.length, 7);
assert_constructor_log_entry(log[0], element1);
assert_attribute_log_entry(log[1], {name: 'id', oldValue: null, newValue: 'first-element', namespace: null});
assert_connected_log_entry(log[2], element1);
assert_constructor_log_entry(log[3], element2);
assert_attribute_log_entry(log[4], {name: 'id', oldValue: null, newValue: 'second-element', namespace: null});
assert_attribute_log_entry(log[5], {name: 'class', oldValue: null, newValue: 'foo', namespace: null});
assert_connected_log_entry(log[6], element2);
}, 'Mutating a undefined custom element while upgrading a custom element must not enqueue or invoke reactions on the mutated element');
test_with_window(function (contentWindow) {
let log = [];
let element1;
let element2;
class TestElement extends contentWindow.HTMLElement {
constructor() {
super();
log.push(create_constructor_log(this));
}
adoptedCallback(...args) {
log.push(create_adopted_callback_log(this, ...args));
if (this == element1)
element3.setAttribute('id', 'foo');
}
connectedCallback(...args) {
log.push(create_connected_callback_log(this, ...args));
}
attributeChangedCallback(...args) {
log.push(create_attribute_changed_callback_log(this, ...args));
}
static get observedAttributes() { return ['id', 'class']; }
}
contentWindow.customElements.define('test-element', TestElement);
let contentDocument = contentWindow.document;
element1 = contentDocument.createElement('test-element');
element2 = contentDocument.createElement('test-element');
element3 = contentDocument.createElement('test-element');
assert_equals(Object.getPrototypeOf(element1), TestElement.prototype);
assert_equals(Object.getPrototypeOf(element2), TestElement.prototype);
assert_equals(Object.getPrototypeOf(element3), TestElement.prototype);
assert_equals(log.length, 3);
assert_constructor_log_entry(log[0], element1);
assert_constructor_log_entry(log[1], element2);
assert_constructor_log_entry(log[2], element3);
log = [];
const container = contentDocument.createElement('div');
container.appendChild(element1);
container.appendChild(element2);
container.appendChild(element3);
const anotherDocument = document.implementation.createHTMLDocument();
anotherDocument.documentElement.appendChild(container);
assert_equals(log.length, 7);
assert_adopted_log_entry(log[0], element1);
assert_adopted_log_entry(log[1], element3);
assert_connected_log_entry(log[2], element3);
assert_attribute_log_entry(log[3], {name: 'id', oldValue: null, newValue: 'foo', namespace: null});
assert_connected_log_entry(log[4], element1);
assert_adopted_log_entry(log[5], element2);
assert_connected_log_entry(log[6], element2);
}, 'Mutating another custom element inside adopted callback must invoke all pending callbacks on the mutated element');
</script>
</body>
</html>