chromium/third_party/blink/web_tests/external/wpt/css/css-tables/rules-groups.html

<!DOCTYPE html>
<meta charset=utf-8>
<title>CSS Test: legacy table rules attribute</title>
<link rel="author" title="Jonathan Kew" href="mailto:[email protected]">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1832101">
<link rel="match" href="rules-groups-ref.html">

<style>
table { margin: 1em 1em 2em 1em; }

/* Modify style of the inter-group borders, assuming default UA rules are in effect. */

/* With border-block-start suppressed, the block-end border should still appear: */
#a > * { border-block-start: none; }

/* Change the color of the border: */
#b > * { border-block-end-color: blue; }

/* Change the thickness of the border: */
#c > * { border-block-end-width: 5px; }
</style>

<p>Borders between groups should be present:</p>
<table id=a rules=groups>
 <thead><tr><td>head</td></tr></thead>
 <tbody>
   <tr><td>body</td><td>one</td></tr>
   <tr><td>body</td><td>two</td></tr>
 </tbody>
 <tfoot><tr><td>foot</td></tr></tfoot>
</table>

<p>Borders between groups should be blue:</p>
<table id=b rules=groups>
 <thead><tr><td>head</td></tr></thead>
 <tbody>
   <tr><td>body</td><td>one</td></tr>
   <tr><td>body</td><td>two</td></tr>
 </tbody>
 <tfoot><tr><td>foot</td></tr></tfoot>
</table>

<p>Borders between groups should be 5px thick:</p>
<table id=c rules=groups>
 <thead><tr><td>head</td></tr></thead>
 <tbody>
   <tr><td>body</td><td>one</td></tr>
   <tr><td>body</td><td>two</td></tr>
 </tbody>
 <tfoot><tr><td>foot</td></tr></tfoot>
</table>