LayoutTests/compositing/ios/overflow-scroll-touch-tiles.html

<!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <style>
        .scroll {
            height: 300px;
            width: 400px;
            border: 2px solid black;
            overflow: scroll;
            -webkit-overflow-scrolling: touch;
        }

        .box {
            width: 300px;
            height: 2000px;
            border: 1px solid black;
            background-image: repeating-linear-gradient(180deg,rgb(26,198,204),rgb(26,198,204) 7%, rgb(100,100,100) 100%);
        }

    </style>
    <script>
        if (window.testRunner) {
            testRunner.dumpAsText();
            testRunner.waitUntilDone();
        }
        
        function getUIScript()
        {
            return `
            (function() {
                uiController.touchDownAtPoint(50, 300, 1, () => {
                    uiController.dragFromPointToPoint(50, 300, 50, 50, 0.1, () => {
                        uiController.liftUpAtPoint(50, 50, 1, () => {
                            uiController.uiScriptComplete('');
                        });
                    });
                });
            })();`
        }

        function dumpTiles(outputId)
        {
            if (window.internals)
                document.getElementById(outputId).innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_TILE_CACHES);
        }
        function doTest()
        {
            if (!testRunner.runUIScript)
                return;

            dumpTiles('before-layers');

            testRunner.runUIScript(getUIScript(), function(result) {
                dumpTiles('after-layers');
                if (window.testRunner)
                    testRunner.notifyDone();
            });
        }
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
    <div class="scroll">
        <div class="box"></div>
    </div>

<pre id="before-layers">Layer tree goes here</pre>
<pre id="after-layers">Layer tree goes here</pre>
</body>
</html>