chromium/third_party/blink/web_tests/external/wpt/html/editing/dnd/selection/162.xhtml

<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Selection drag and drop between contenteditable elements</title>
<style type="text/css">
div + div[contenteditable]
  {width:300px;
  height:100px;
  margin-top:20px;
  padding:10px;
  color:white;
  background-color:navy;}
</style>
</head>
<body onload="window.getSelection().selectAllChildren(document.querySelector('div'))">
<p>Drag selected text to the blue box. Copy of selection should end up in the blue box once you drop it there.</p>
<div contenteditable="true">Drag me</div>
<div contenteditable="true"/>
</body>
</html>