chromium/third_party/blink/web_tests/fast/parser/fragment-parser-doctype.html

<html>
<head>
<script src="../../resources/js-test.js"></script>
</head>
<body>
<script>
    debug("Verify that a fragment's DOCTYPE does not affect parsing. We expect DOCTYPEs to be ignored for fragments with context elements.");
    var container = document.createElement("div");
    document.body.appendChild(container);
    container.innerHTML = "<!DOCTYPE html><p><table>"
    shouldBeNull("container.firstChild.nextSibling");    
</script>
<p id="test"><table></table>
<script>
    debug ("Verify that a fragment's DOCTYPE does not change the compatibility mode of the owner document.");
    var test = document.getElementById("test");
    shouldBeNull("container.firstChild.nextSibling");
</script>
</body>
</html>