chromium/third_party/blink/web_tests/fast/table/border-collapsing/equal-precedence-resolution.html

<style>
    table { border-collapse: collapse; }
    td { width: 25px; height: 25px; }
</style>
<table>
    <colgroup span="2"><colgroup span="1" style="border-right: 5px solid rgba(0, 127, 0, 0.5);"><colgroup span="1" style="border-left: 5px solid red">
    <tr>
        <td style="border-right: 5px solid rgba(0, 127, 0, 0.5); border-bottom: 5px solid rgba(0, 127, 0, 0.5);"></td>
        <td style="border-left: 5px solid red;"></td>
        <td></td>
        <td></td>
    </tr>
    <tr>
        <td style="border-top: 5px solid red;"></td>
        <td></td>
        <td></td>
        <td></td>
    </tr>
</table>
<table style="direction: rtl;">
    <colgroup span="2"><colgroup span="1" style="border-left: 5px solid rgba(0, 127, 0, 0.5);"><colgroup span="1" style="border-right: 5px solid red">
    <tr>
        <td style="border-left: 5px solid rgba(0, 127, 0, 0.5); border-bottom: 5px solid rgba(0, 127, 0, 0.5);"></td>
        <td style="border-right: 5px solid red;"></td>
        <td></td>
        <td></td>
    </tr>
    <tr>
        <td style="border-top: 5px solid red;"></td>
        <td></td>
        <td></td>
        <td></td>
    </tr>
</table>
<table>
    <tr style="border-bottom: 5px solid rgba(0, 127, 0, 0.5);">
        <td></td>
    </tr>
    <tr style="border-top: 5px solid red;">
        <td></td>
    </tr>
</table>
<table>
    <tbody style="border-bottom: 5px solid rgba(0, 127, 0, 0.5);">
        <tr>
            <td></td>
        </tr>
    </tbody>
    <tbody style="border-top: 5px solid red;">
        <tr>
            <td></td>
        </tr>
    </tbody>
</table>