code: @Test public void testRequestContentNullTypeAndEncoding() throws Exception {
    HttpContext context=new BasicHttpContext(null);
    BasicHttpEntityEnclosingRequest request=new BasicHttpEntityEnclosingRequest("POST","/");
    BasicHttpEntity entity=new BasicHttpEntity();
    request.setEntity(entity);
    RequestContent interceptor=new RequestContent();
    interceptor.process(request,context);
    Assert.assertNull(request.getFirstHeader(HTTP.CONTENT_TYPE));
    Assert.assertNull(request.getFirstHeader(HTTP.CONTENT_ENCODING));
  }
  