code:     public void testHandleNeverSendAResponse() throws Exception
      {
          final AuthenticationResult firstResult = _negotiator.handleResponse(new byte[0]);
          assertEquals("Unexpected authentication status", AuthenticationResult.AuthenticationStatus.CONTINUE, firstResult.getStatus());
          assertArrayEquals("Unexpected authentication challenge", new byte[0], firstResult.getChallenge());
  
          final AuthenticationResult secondResult = _negotiator.handleResponse(new byte[0]);
          assertEquals("Unexpected first authentication result", AuthenticationResult.AuthenticationStatus.ERROR, secondResult.getStatus());
      }
  
  