LayoutTests/editing/pasteboard/paste-unrendered-select.html

<p>This tests copy/paste of an unrendered select.  The options inside of it should not be pasted.</p>
<div id="copy" contenteditable="true">Hello <span style="display:none;"><select><option>1</option></select></span> World</div>
<div id="paste" contenteditable="true"></div>

<script>
var copy = document.getElementById("copy");
copy.focus();
document.execCommand("SelectAll");
document.execCommand("Copy");

var paste = document.getElementById("paste");
paste.focus();
document.execCommand("Paste");
</script>