/**
  * Test T12 - unknown header, with MustUnderstand true
  *
  * @throws Exception
  */
 public void testT12() throws Exception {
   Call call = new Call(DOC_ENDPOINT);
   call.setOperationStyle(Style.DOCUMENT);
   call.setSOAPVersion(SOAPConstants.SOAP12_CONSTANTS);
   SOAPEnvelope reqEnv = new SOAPEnvelope(SOAPConstants.SOAP12_CONSTANTS);
   SOAPHeaderElement header = new SOAPHeaderElement(TEST_NS, "Unknown");
   header.setObjectValue("test header");
   header.setMustUnderstand(true);
   reqEnv.addHeader(header);
   try {
     call.invoke(reqEnv);
   } catch (AxisFault fault) {
     assertEquals(Constants.FAULT_SOAP12_MUSTUNDERSTAND, fault.getFaultCode());
     ArrayList headers = fault.getHeaders();
     // If there is a NotUnderstood header, check it
     for (Iterator i = headers.iterator(); i.hasNext(); ) {
       SOAPHeaderElement h = (SOAPHeaderElement) i.next();
       if (h.getQName().equals(Constants.QNAME_NOTUNDERSTOOD)) {
         // TODO : check qname attribute
       }
     }
     return;
   }
   fail("Didn't receive expected fault!");
 }