LayoutTests/media/modern-media-controls/layout-item/layout-item.html

<script src="../../../resources/js-test-pre.js"></script>
<script src="../resources/media-controls-loader.js" type="text/javascript"></script>
<script type="text/javascript">

description("Testing the <code>LayoutItem</code> class.");

const layoutDelegate = new class
{
    get layoutTraits()
    {
        return new MacOSLayoutTraits(LayoutTraits.Mode.Fullscreen);
    }
};

debug("Creating a LayoutItem and setting a layout delegate after construction.");
const itemWithNoParameter = new LayoutItem;
shouldThrow("itemWithNoParameter.layoutTraits");

itemWithNoParameter.layoutDelegate = layoutDelegate;
shouldBeType("itemWithNoParameter.layoutTraits", "MacOSLayoutTraits");
shouldBeTrue("itemWithNoParameter.layoutTraits.isFullscreen");

debug("");
debug("Creating a LayoutItem with a layout delegate set at construction.");
const itemWithLayoutDelegate = new LayoutItem({ layoutDelegate });
shouldBeType("itemWithNoParameter.layoutTraits", "MacOSLayoutTraits");
shouldBeTrue("itemWithNoParameter.layoutTraits.isFullscreen");

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