chromium/third_party/blink/web_tests/fast/table/table-and-parts-outline.html

<html>
<style>
table { outline: dotted green 2px; }
td { outline: solid black 2px; }
</style>
    You should see a table with a dotted green outline, and four table cells inside it with a solid black outline.<br/><br/>
    <table>
        <tr>
            <td>Cell 1</td>
            <td>Cell 2</td>
        </tr>
        <tr>
            <td>Cell 3</td>
            <td>Cell 4</td>
        </tr>
    </table>
</html>