code: /** 
   * Verify 'If-None-Match' request header
   * @throws Exception
   */
  @Test public void ifNoneMatchHeader() throws Exception {
    final AtomicReference<String> header=new AtomicReference<String>();
    handler=new RequestHandler(){
      @Override public void handle(    Request request,    HttpServletResponse response){
        response.setStatus(HTTP_OK);
        header.set(request.getHeader("If-None-Match"));
      }
    }
  ;
    assertTrue(get(url).ifNoneMatch("eid").ok());
    assertEquals("eid",header.get());
  }
  