code: /** 
   * Verify data is send when receiving response headers without first calling {@link HttpRequest#code()}
   * @throws Exception
   */
  @Test public void sendHeadersWithoutCode() throws Exception {
    final AtomicReference<String> body=new AtomicReference<String>();
    handler=new RequestHandler(){
      @Override public void handle(    Request request,    HttpServletResponse response){
        body.set(new String(read()));
        response.setHeader("h1","v1");
        response.setHeader("h2","v2");
        response.setStatus(HTTP_OK);
      }
    }
  ;
    HttpRequest request=post(url).ignoreCloseExceptions(false);
    Map<String,List<String>> headers=request.send("hello").headers();
    assertEquals("v1",headers.get("h1").get(0));
    assertEquals("v2",headers.get("h2").get(0));
    assertEquals("hello",body.get());
  }
  