third_party/WebKit/LayoutTests/imported/wpt/html/rendering/non-replaced-elements/tables/table-cell-width.html

<link rel="match" href="table-cell-width-ref.html">
<style>
body {
  margin: 0;
}

table {
  width: 400px;
  border-collapse: collapse;
}

th {
  font-weight: normal;
  text-align: left;
}

td, th {
  padding: 0;
}

td:first-child, th:first-child {
  background-color: red;
}
</style>

<!-- width=0 should be treated as 'auto' -->
<table>
  <tr>
    <th width=0>a</th>
    <th>a</th>
  </tr>
</table>

<table>
  <tr>
    <td width=0>a</td>
    <td>a</td>
  </tr>
</table>

<!-- test valid width attribute value-->
<table>
  <tr>
    <th width=100>a</th>
    <th>a</th>
  </tr>
</table>

<table>
  <tr>
    <td width=100>a</td>
    <td>a</td>
  </tr>
</table>