table-cell-writing-mode-computed.html

<!DOCTYPE html>
<title>Computed value of orthogonal writing-mode on table cell</title>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<link rel="help" href="https://www.w3.org/TR/css-tables-3">
<link rel="help" href="https://crbug.com/1307976">
<style>
  td {
    writing-mode: vertical-lr;
  }
</style>

<table>
  <tr>
    <td>Test</td>
  </tr>
</table>

<script>
  test(() => {
    let td = document.querySelector('td');
    assert_equals(getComputedStyle(td).writingMode, 'vertical-lr');
  }, 'Computed value of orthogonal writing-mode on table cell');
</script>

chromium/third_party/blink/web_tests/external/wpt/css/css-tables/table-cell-writing-mode-computed.html