chromium/third_party/blink/web_tests/editing/pasteboard/onpaste-text-html-types.html

<div id="test" onpaste="paste(event)">This test verifies that we can get types from the clipboard
during an onpaste event.  This test requires DRT.</div>

<div id="results">FAIL</div>

<script src="../editing.js"></script>
<script>
function paste(ev)
{
    var types = ev.clipboardData.types;
    if (types.indexOf('text/plain') >= 0 &&
        types.indexOf('text/html') >= 0)
        document.getElementById("results").innerHTML = "PASS";
}

function editingTest()
{
    var selection = window.getSelection();
    selection.modify("extend", "forward", "sentence");
    copyCommand();

    pasteCommand();
}

runDumpAsTextEditingTest(false);
</script>