element-request-fullscreen-and-remove-iframe.html

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This WPT test may be referenced by the following Test IDs:
- /fullscreen/api/element-request-fullscreen-and-remove-iframe.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>

    Element#requestFullscreen() in iframe followed by removing the 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>

<iframe allowfullscreen></iframe>

<script>

    promise_test(async (t) => {

        const iframe = document.querySelector("iframe");

        await new Promise((resolve) => {

            iframe.onload = resolve;

            iframe.src = "about:blank";

});

        const iframeDocument = iframe.contentDocument;

        document.onfullscreenchange = t.unreached_func(

            "fullscreenchange event"

);

        document.onfullscreenerror = t.unreached_func("fullscreenerror event");

        iframeDocument.onfullscreenchange = t.unreached_func(

            "iframe fullscreenchange event"

);

        iframeDocument.onfullscreenerror = t.unreached_func(

            "iframe fullscreenerror event"

);

        await trusted_click(document.body);

        const p = iframeDocument.body.requestFullscreen();

        const typeErrorConstructor = iframe.contentWindow.TypeError;

        iframe.remove();

        // Prevent the tests from hanging if the promise never rejects.

        const errorPromise = new Promise((_, reject) =>

            t.step_timeout(() => {

                assert_unreached("Promise didn't reject.");

                reject(new Error("Promise didn't reject."));

            }, 1000)

);

        await Promise.race([

            promise_rejects_js(t, typeErrorConstructor, p),

            errorPromise,

]);

        assert_equals(document.fullscreenElement, null);

        assert_equals(iframeDocument.fullscreenElement, null);

    }, "requestFullscreen() in iframe followed by removing the iframe");

</script>