<!DOCTYPE html>
<html>
<body>
<div id="container"><b>hello <span id="host">world</span></b> rocks</div>
<script src="resources/dump-attributed-string.js"></script>
<script>

const shadowRoot = host.attachShadow({mode: 'open'});
shadowRoot.innerHTML = '<slot style="color: blue;"></slot> WebKit';

if (window.testRunner)
    dumpAttributedString(container, container, 0, shadowRoot.lastChild, shadowRoot.lastChild.data.indexOf('Kit'));

</script>
</body>
</html>