chromium/third_party/blink/web_tests/http/tests/security/referrer-policy-window-open.html

<html>
<head>
<meta name="referrer" content="origin" />
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
    testRunner.setPopupBlockingEnabled(false);
}

window.addEventListener("message", receiveMessage, false);

function receiveMessage(evt) {
    if (evt.data == "done") {
        if (window.testRunner)
            testRunner.notifyDone();
    } else {
        document.getElementById("log").innerHTML += evt.data + "<br>";
    }
}
</script>
</head>
<body>
<p>
    This test opens a new window. It passes, if the referrer is the origin
    only.
</p>
<div id="log">
</div>
<script>
window.open("resources/referrer-policy-postmessage.php");
</script>
</body>
</html>