custom-elements/reactions/HTMLTitleElement.html

<!DOCTYPE html>
<html>
<head>
<title>Custom Elements: CEReactions on HTMLTitleElement interface</title>
<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
<meta name="assert" content="text of HTMLTitleElement interface must have CEReactions">
<meta name="help" content="https://dom.spec.whatwg.org/#node">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/custom-elements-helpers.js"></script>
<script src="./resources/reactions.js"></script>
</head>
<body>
<div id="log"></div>
<script>

test_with_window(function (contentWindow, contentDocument) {
    const element = define_custom_element_in_window(contentWindow, 'custom-element', []);
    const instance = contentWindow.document.createElement(element.name);
    assert_array_equals(element.takeLog().types(), ['constructed']);

    contentWindow.document.title = 'hello';
    const titleElement = contentDocument.querySelector('title');
    titleElement.appendChild(instance);
    assert_array_equals(element.takeLog().types(), ['connected']);
    assert_equals(titleElement.childNodes.length, 2);

    titleElement.text = 'world';
    assert_equals(titleElement.childNodes.length, 1);
    assert_array_equals(element.takeLog().types(), ['disconnected']);
}, 'text on HTMLTitleElement must enqueue disconnectedCallback when removing a custom element');

</script>
</body>
</html>