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

<p>Before</p>

<iframe id="iframe" title="InnerFrame"></iframe>

<p>After</p>

<p>End of test</p>

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

<script>
    description("This tests that when an iframe finishes loading, it sends a notification.");

    window.jsTestIsAsync = true;

    // Recursively search the entire accessibility tree starting at the given
    // AccessibilityUIElement (inclusive) and return the element whose title
    // contains the given string. This makes it possible to find a node even
    // when there are platform differences in the tree, i.e. due to different
    // nodes being ignored.
    function findByAccessibleTitleSubstring(startElement, titleSubstring)
    {
        if (startElement.title.indexOf(titleSubstring) >= 0)
            return startElement;

        for (var i = 0; i < startElement.childrenCount; i++) {
            var found = findByAccessibleTitleSubstring(startElement.childAtIndex(i), titleSubstring);
            if (found)
                return found;
        }

        return null;
    }

    if (window.accessibilityController) {
        window.root = accessibilityController.rootElement;

        // Initially, the iframe should not be loaded, so we shouldn't be able to find this button.
        shouldBeFalse("findByAccessibleTitleSubstring(root, 'InnerButton') != null");

        var gotLoadCompleteNotification = false;
        window.accessibilityController.addNotificationListener(function (target, notification) {
            // Ignore this notification if it's not on the iframe or not about the iframe being loaded.
            var targetString = platformValueForW3CName(target);
            if (targetString.indexOf("InnerFrame") != -1
                && notification == "AXLoadComplete")
                gotLoadCompleteNotification = true;
        });

        setTimeout(async function() {
            // Reset gotLoadCompleteNotification to false to disregard any notification up to  this point.
            gotLoadCompleteNotification = false;
            await waitFor(() => {
                return gotLoadCompleteNotification;
            });
            debug("Got AXLoadComplete notification on iframe.");

            await waitFor(() => {
                return findByAccessibleTitleSubstring(root, 'InnerButton');
            });
            // Check that the button within the iframe is now reachable from the root.
            shouldBeTrue("findByAccessibleTitleSubstring(root, 'InnerButton') != null");

            accessibilityController.removeNotificationListener();
            finishJSTest();
        }, 0);
    }

    window.iframeElement = document.getElementById("iframe");

    // Load content into the iframe. This will trigger the event
    // handler above, which will check that the accessibility tree
    // was updated with new content.
    window.iframeElement.src = "data:text/html,<body><button>InnerButton</button></body>";
</script>
<script src="../resources/js-test-post.js"></script>
</body>
</html>