third_party/web_platform_tests/XMLHttpRequest/setrequestheader-header-forbidden.htm

<!doctype html>
<html>
  <head>
    <title>XMLHttpRequest: setRequestHeader() - headers that are forbidden</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <link rel="help" href="https://xhr.spec.whatwg.org/#the-setrequestheader()-method" data-tested-assertations="/following::ol/li[5]" />

  </head>
  <body>
    <div id="log"></div>
    <script>
      test(function() {
        var client = new XMLHttpRequest()
        client.open("POST", "resources/inspect-headers.py?filter_value=TEST", false)
        client.setRequestHeader("Accept-Charset", "TEST")
        client.setRequestHeader("Accept-Encoding", "TEST")
        client.setRequestHeader("Connection", "TEST")
        client.setRequestHeader("Content-Length", "TEST")
        client.setRequestHeader("Cookie", "TEST")
        client.setRequestHeader("Cookie2", "TEST")
        client.setRequestHeader("Date", "TEST")
        client.setRequestHeader("DNT", "TEST")
        client.setRequestHeader("Expect", "TEST")
        client.setRequestHeader("Host", "TEST")
        client.setRequestHeader("Keep-Alive", "TEST")
        client.setRequestHeader("Referer", "TEST")
        client.setRequestHeader("TE", "TEST")
        client.setRequestHeader("Trailer", "TEST")
        client.setRequestHeader("Transfer-Encoding", "TEST")
        client.setRequestHeader("Upgrade", "TEST")
        client.setRequestHeader("Via", "TEST")
        client.setRequestHeader("Proxy-", "TEST")
        client.setRequestHeader("Proxy-Authorization", "TEST")
        client.setRequestHeader("Sec-", "TEST")
        client.setRequestHeader("Sec-X", "TEST")
        client.send(null)
        assert_equals(client.responseText, "")
      })
    </script>
  </body>
</html>