chromium/third_party/blink/web_tests/paint/invalidation/overflow/vertical-overflow-parent.html

<!DOCTYPE html>
<html><head>
    <style>
        .container {
            margin: 20px;
            width: 300px;
            height: 200px;
            border: 1px solid black;
            overflow: scroll;
        }
        .vertical-rl {
            -webkit-writing-mode: vertical-rl;
        }
        .offset {
            width: 2000px;
            height: 100px;
        }
        .target {
            width: 100px;
            height: 100px;
            background-color: orange;
            visibility: hidden;
        }
    </style>
</head>
<body>
    <div class="vertical-rl">
    <div class="container">
        <div class="offset"></div>
        <div class="target"></div>
    </div></div>
    An orange rect should be painted.<br/>
    In DumpRenderTree, there should be repaint logs of 100x100 rect. We don't care how many times is the log dumpped.
    <script src="../../../resources/run-after-layout-and-paint.js"></script>
    <script src="../resources/text-based-repaint.js"></script>
    <script>
        repaintTest = function() {
            var target = document.getElementsByClassName("target")[0];
            target.style.visibility = "visible";
        };
        var container = document.getElementsByClassName("container")[0];
        runAfterLayoutAndPaint(function() {
            container.scrollLeft = -1815;
            runRepaintAndPixelTest();
        });
    </script>
</body></html>