code: /** 
   * Verify response in  {@link Appendable}
   * @throws Exception
   */
  @Test public void receiveAppendable() throws Exception {
    final StringBuilder body=new StringBuilder();
    handler=new RequestHandler(){
      @Override public void handle(    Request request,    HttpServletResponse response){
        response.setStatus(HTTP_OK);
        try {
          response.getWriter().print("content");
        }
   catch (      IOException e) {
          fail();
        }
      }
    }
  ;
    assertTrue(post(url).receive(body).ok());
    assertEquals("content",body.toString());
  }
  