LayoutTests/accessibility/mac/local-frame-presentational-iframe-nested-content.html

<!DOCTYPE HTML>
<html>
<head>
<script src="../../resources/accessibility-helper.js"></script>
<script src="../../resources/js-test.js"></script>
</head>
<body>

<div id="host" role="group">
<button id="before">Before</button>
<iframe id="iframe" role="none" src="../resources/presentational-iframe-nested-middle.html"></iframe>
<button id="after">After</button>
</div>

<script>
var output = "This test ensures that when a presentational (accessibility-ignored) iframe hosts a document that itself contains an iframe, the nested iframe's content is reachable from the host, and the hoisted children's parents are consistent with the host's children.\n\n";

var host, root, button;
function ancestryReaches(element, target) {
    for (var ancestor = element; ancestor; ancestor = ancestor.parentElement()) {
        if (ancestor.isEqual(target))
            return true;
    }
    return false;
}

function descendantsInclude(element, target, depth) {
    if (!element || depth > 10)
        return false;
    if (element.isEqual(target))
        return true;
    for (var i = 0; i < element.childrenCount; i++) {
        if (descendantsInclude(element.childAtIndex(i), target, depth + 1))
            return true;
    }
    return false;
}

function hostChildrenAreAllReachable() {
    for (var i = 0; i < host.childrenCount; i++) {
        if (!host.childAtIndex(i))
            return false;
    }
    return true;
}

function hostChildrenParentsAreHost() {
    for (var i = 0; i < host.childrenCount; i++) {
        var child = host.childAtIndex(i);
        if (!child)
            return false;
        var parent = child.parentElement();
        if (!parent || !parent.isEqual(host))
            return false;
    }
    return true;
}

window.jsTestIsAsync = true;

async function runTest() {
    if (!window.accessibilityController)
        return;

    button = await waitForElementById("frame-button-1");
    await waitFor(() => {
        host = accessibilityController.accessibleElementById("host");
        return button && host && descendantsInclude(host, button, 0);
    });

    root = accessibilityController.rootElement;

    output += expect("host.childAtIndex(0).domIdentifier", "'before'");
    output += expect("host.childAtIndex(host.childrenCount - 1).domIdentifier", "'after'");
    output += expect("descendantsInclude(host, button, 0)", "true");
    output += expect("hostChildrenAreAllReachable()", "true");
    output += expect("hostChildrenParentsAreHost()", "true");
    output += expect("(button && host ? ancestryReaches(button, host) : false)", "true");
    output += expect("(button && root ? ancestryReaches(button, root) : false)", "true");

    debug(output);
    finishJSTest();
}

window.addEventListener("load", runTest);
</script>
</body>
</html>