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

<p id="description"></p>
<p id="paragraph">Plain text paragraph <a id="testLink" href="#">with a link at the end</a></p>

<div id="console"></div>

<script>
window.jsTestIsAsync = true;

description("This test ensures that a notification is being emitted when children are added or removed for an accessibility object");

function runTest() {
    window.paragraphNotificationCount = 0;
    window.globalNotificationCount = 0;

    if (window.accessibilityController) {
        var axWebArea = accessibilityController.rootElement.childAtIndex(0);

        // Ensure the accessibility hierarchy is generated.
        touchAccessibilityTree(axWebArea);

        window.paragraph = axWebArea.childAtIndex(1);
        paragraph.addNotificationListener(function(notification) {
            paragraphNotificationCount++;
            debug("PARAGRAPH notification: " + notification);
        });

        accessibilityController.addNotificationListener(function(element, notification) {
            if (!element.isEqual(paragraph))
                return;

            globalNotificationCount++;
            debug("GLOBAL notification: " + notification + " on element with role " + element.role);
        });
    }

    var par = document.getElementById('paragraph');
    window.newChild = document.createElement('button');
    par.appendChild(newChild);

    // Ensure the new child is added.
    touchAccessibilityTree(axWebArea);

    window.setTimeout(function() {
        var link = document.getElementById('testLink');
        link.style.display = 'none';

        // Ensure the accessibility hierarchy is regenerated.
        touchAccessibilityTree(axWebArea);

        shouldBe("paragraphNotificationCount", "globalNotificationCount");
        shouldBe("globalNotificationCount", "2");

        if (window.accessibilityController) {
            paragraph.removeNotificationListener();
            accessibilityController.removeNotificationListener();
        }

        finishJSTest();
    }, 0);
}

runTest();
</script>

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