<!DOCTYPE html>
<html>
<head>
<title>Custom Elements: disconnectedCallback must be enqueued inside a detached iframe</title>
<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
<meta name="assert" content="disconnectedCallback must be enqueued inside a detached iframe">
<meta name="help" content="https://dom.spec.whatwg.org/#concept-node-remove">
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../../imported/w3c/web-platform-tests/custom-elements/resources/custom-elements-helpers.js"></script>
<script src="../../imported/w3c/web-platform-tests/custom-elements/reactions/resources/reactions.js"></script>
</head>
<body>
<div id="log"></div>
<script>

function create_iframe_and_wait_for_onload() {
    return new Promise(function (resolve) {
        let iframe = document.createElement('iframe');
        iframe.onload = function () { resolve(iframe); }
        document.body.appendChild(iframe);
    });
}

let element = define_custom_element_in_window(window, 'test-element');

promise_test(() => {
    return create_iframe_and_wait_for_onload().then((iframe) => {
        let testElement = document.createElement('test-element');
        assert_array_equals(element.takeLog().types(), ['constructed']);

        let contentDocument = iframe.contentDocument;
        iframe.contentDocument.body.appendChild(testElement);
        assert_array_equals(element.takeLog().types(), ['adopted', 'connected']);

        iframe.remove();
        assert_array_equals(element.takeLog().types(), []);

        contentDocument.body.remove();
        assert_array_equals(element.takeLog().types(), ['disconnected']);
    });
}, 'Removing a custom element inside a detached iframe must enqueue disconnectedCallback');

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