<!DOCTYPE html>
<title>
    Element#requestFullscreen() followed by moving the element into an iframe
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="../trusted-click.js"></script>
<div id="log"></div>
<div id="target"></div>
<iframe allowfullscreen></iframe>
<script>
    // rfsPromise will be uncaught
    setup({ allow_uncaught_exception: true });

    promise_test(async (t) => {
        const iframe = document.querySelector("iframe");
        await new Promise((r) => {
            iframe.onload = r;
            iframe.src = "about:blank";
        });
        const target = document.getElementById("target");
        const iframeDoc = iframe.contentDocument;

        iframeDoc.onfullscreenchange = t.unreached_func(
            "fullscreenchange event in iframe"
        );
        iframeDoc.onfullscreenerror = t.unreached_func(
            "fullscreenerror event in iframe"
        );
        document.onfullscreenchange = t.unreached_func(
            "fullscreenchange event"
        );

        const errorPromise = new Promise(
            (resolve) => (document.onfullscreenerror = resolve)
        );
        await trusted_click(document.body);
        const rfsPromise = target.requestFullscreen();
        iframeDoc.body.appendChild(target);
        const event = await errorPromise;
        assert_equals(
            iframeDoc.fullscreenElement,
            null,
            "inner fullscreen element"
        );
        assert_equals(
            document.fullscreenElement,
            null,
            "outer fullscreen element"
        );
        assert_equals(event.target, document, "event target");
        await promise_rejects_js(
            t,
            TypeError,
            rfsPromise,
            "requestFullscreen promise"
        );
    }, "Element#requestFullscreen() followed by moving the element into an iframe");
</script>
