chromium/third_party/blink/web_tests/paint/selection/text-selection-newline-vertical-rl.html

<!DOCTYPE html>
<html>
<head>
<script src="../../resources/ahem.js"></script>
<script src="../../resources/run-after-layout-and-paint.js"></script>
<script src="resources/selection.js"></script>
<style>
div {
    font-family: Ahem;
    height: 2em;
    -webkit-writing-mode: vertical-rl;
}
body { background-color: lightgreen; }
</style>
</head>
<body onload="selectRange(container, 0, container, 1);">
<!-- Two lines in one block which should wrap and include space representing
     a newline at the end of the first line. -->
<div id="container">
    xx y
</div>
</body>