code: /** 
   * Verify getting all headers
   * @throws Exception
   */
  @Test public void getAllHeaders() throws Exception {
    handler=new RequestHandler(){
      @Override public void handle(    Request request,    HttpServletResponse response){
        response.setStatus(HTTP_OK);
        response.setHeader("a","a");
        response.setHeader("b","b");
        response.addHeader("a","another");
      }
    }
  ;
    Map<String,List<String>> headers=get(url).headers();
    assertEquals(headers.size(),5);
    assertEquals(headers.get("a").size(),2);
    assertTrue(headers.get("b").get(0).equals("b"));
  }
  