LayoutTests/media/modern-media-controls/layout-node/x.html

<script src="../../../resources/js-test-pre.js"></script>
<script src="../../../../Source/WebCore/Modules/modern-media-controls/controls/scheduler.js" type="text/javascript"></script>
<script src="../../../../Source/WebCore/Modules/modern-media-controls/controls/layout-node.js" type="text/javascript"></script>
<script src="../resources/media-controls-utils.js" type="text/javascript"></script>
<script type="text/javascript">

description("Testing the <code>LayoutNode.x</code> property.");

window.jsTestIsAsync = true;

const node = new LayoutNode;

debug("Checking default value");
shouldBe("node.x", "0");
shouldBeEqualToString("node.element.style.left", "");

debug("");
debug("node.x = 10");
node.x = 10;
shouldBe("node.x", "10");
shouldBeEqualToString("node.element.style.left", "");

// Set the value to another one so we can check it's the one committed to the DOM.
debug("");
debug("node.x = 20");
node.x = 20;

scheduler.frameDidFire = function()
{
    debug("");
    debug("Layout was performed");
    shouldBe("node.x", "20");
    shouldBeEqualToString("node.element.style.left", "20px");

    debug("");
    debug("node.x = 20");
    node.x = 20;
    shouldBeFalse("scheduler.hasScheduledLayoutCallbacks");
    debug("");

    finishMediaControlsTest();
};

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