chromium/third_party/blink/web_tests/external/wpt/html/editing/dnd/selection/088.xhtml

<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Vertical scrolling during selection drag and drop to text input</title>
<style type="text/css">
input[placeholder]
  {width:300px;
  height:50px;}
div > p:first-child
  {margin-bottom:200px;}
body > div
  {height:150px;
  width:500px;
  overflow-y:scroll;}
div > div
  {height:400px;}
</style>
</head>
<body onload="window.getSelection().selectAllChildren(document.querySelector('p'))">
<p>Drag me</p>
<div>
  <div>
    <p>You should be able to drag selected text to the input at the bottom of scrollable container (dragging towards the bottom edge triggers scrolling).</p>
    <input placeholder="Drop selection here"/>
    <p>Copy of selection should end up in the input once you drop it there.</p>
  </div>
</div>
</body>
</html>