<!DOCTYPE html>
<style>
  body {
    height: 2000px;
    width: 2000px;
  }
</style>

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
    var pageScaleFactor = 2;

    if (window.internals)
        internals.settings.setVisualViewportEnabled(true);

    var test = async_test('Verify a resize event gets fired on window.visualViewport after pinch-zoom');

    var resizeDone = false;
    var zoomDone = false;

    function checkForDone()
    {
        if (resizeDone && zoomDone)
            test.done();
    }

    function resizeHandler()
    {
        resizeDone = true;
        checkForDone();
    }

    function getUIScript()
    {
        return `(function() {
            uiController.zoomToScale(${pageScaleFactor}, function() {
                uiController.uiScriptComplete(uiController.zoomScale);
            });
        })();`;
    }

    window.onload = function() {
        window.visualViewport.addEventListener('resize', resizeHandler);
        testRunner.runUIScript(getUIScript(), function() {
            zoomDone = true;
            checkForDone();
        });
    };
</script>