<script src="../../../resources/js-test-pre.js"></script>
<script src="../resources/media-controls-loader.js" type="text/javascript"></script>
<body>
<video src="../../content/test.mp4" style="width: 320px; height: 240px;" controls></video>
<div id="shadow"></div>
<script type="text/javascript">

window.jsTestIsAsync = true;

description("Testing the <code>ControlsVisibilitySupport</code> behavior when the controls attribute changes.");

const shadowRoot = document.querySelector("div#shadow").attachShadow({ mode: "open" });
const media = document.querySelector("video");
const mediaController = createControls(shadowRoot, media, null);

let numberOfMutations = 0;
new MutationObserver(() => {
    numberOfMutations++;

    if (numberOfMutations === 1) {
        shouldBeFalse("mediaController.controls.visible");

        debug("");
        debug("Turning controls back on");
        media.controls = true;
    } else {
        shouldBeTrue("mediaController.controls.visible");

        debug("");
        shadowRoot.host.remove();
        media.remove();
        finishJSTest();
    }
}).observe(media, { attributes: true, attributeFilter: ["controls"] });

media.addEventListener("loadedmetadata", function() {
    debug("");
    debug("Media has loaded metadata");
    shouldBecomeEqual("media.videoTracks.length", "1", () => {
        shouldBeTrue("mediaController.controls.visible");

        debug("");
        debug("Turning controls off");
        media.controls = false;
    });
});

</script>
<script src="../../../resources/js-test-post.js"></script>
</body>