LayoutTests/accessibility/mac/scroll-view-scrollbar-attributes.html

<!DOCTYPE HTML>
<html>
<head>
<script src="../../resources/accessibility-helper.js"></script>
<script src="../../resources/js-test.js"></script>
<style>
#oversized { width: 200vw; height: 200vh; }
</style>
</head>
<body>

<div id="oversized"></div>

<script>
var output = "This test ensures the scroll view's AXHorizontalScrollBar and AXVerticalScrollBar each resolve to the correspondingly-oriented scrollbar, and that each is the same object the scroll view exposes as a child.\n\n";

function scrollBarChildWithOrientation(scrollArea, orientation)
{
    for (var i = 0; i < scrollArea.childrenCount; i++) {
        var child = scrollArea.childAtIndex(i);
        if (child.role === "AXRole: AXScrollBar" && child.orientation === `AXOrientation: ${orientation}`)
            return child;
    }
    return null;
}

if (window.accessibilityController) {
    var scrollArea = accessibilityController.rootElement;

    output += expect("scrollArea.horizontalScrollbar.role", "'AXRole: AXScrollBar'");
    output += expect("scrollArea.horizontalScrollbar.orientation", "'AXOrientation: AXHorizontalOrientation'");
    output += expect("scrollArea.verticalScrollbar.role", "'AXRole: AXScrollBar'");
    output += expect("scrollArea.verticalScrollbar.orientation", "'AXOrientation: AXVerticalOrientation'");

    var horizontalScrollbarChild = scrollBarChildWithOrientation(scrollArea, "AXHorizontalOrientation");
    var verticalScrollbarChild = scrollBarChildWithOrientation(scrollArea, "AXVerticalOrientation");
    output += expect("scrollArea.horizontalScrollbar.isEqual(horizontalScrollbarChild)", "true");
    output += expect("scrollArea.verticalScrollbar.isEqual(verticalScrollbarChild)", "true");

    debug(output);
}
</script>
</body>
</html>