code: @Test public void testResponseContentEntityUnknownContentLength() throws Exception {
    HttpContext context=new BasicHttpContext(null);
    HttpResponse response=new BasicHttpResponse(HttpVersion.HTTP_1_1,HttpStatus.SC_OK,"OK");
    BasicHttpEntity entity=new BasicHttpEntity();
    response.setEntity(entity);
    ResponseContent interceptor=new ResponseContent();
    interceptor.process(response,context);
    Header h1=response.getFirstHeader(HTTP.TRANSFER_ENCODING);
    Assert.assertNull(h1);
    Header h2=response.getFirstHeader(HTTP.CONTENT_LEN);
    Assert.assertNull(h2);
  }
  