chromium/third_party/blink/web_tests/external/wpt/css/css-ui/text-overflow-019.html

<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>CSS Basic User Interface Test: ellipsed text selection</title>
<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
<link rel="help" href="http://www.w3.org/TR/css3-ui/#ellipsis-interaction">
<meta name="flags" content="interact dom should">
<meta name="assert" content="If all of the ellipsed text is selected, UAs should show selection of the ellipsis.">
<style>
div{
  font-size: 25px;
  font-family: monospace;
  width: 2.1ch;
  white-space: pre;
  overflow: hidden;
  text-overflow: ellipsis;
  border: solid blue;
}
</style>

<p>This test passes if both the “P” and the ellipsis (“…”) in the blue box bellow appear selected.
<div id=test>Pass</div>

<script>
var sel = window.getSelection();
sel.selectAllChildren(document.getElementById("test"));
</script>