HttpContext context = new BasicHttpContext(null);
BasicHttpRequest request = new BasicHttpRequest("GET", "/");
request.addHeader(new BasicHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE));
context.setAttribute(ExecutionContext.HTTP_REQUEST, request);
HttpResponse response = new BasicHttpResponse(HttpVersion.HTTP_1_1, HttpStatus.SC_OK, "OK");
BasicHttpEntity entity = new BasicHttpEntity();
response.setEntity(entity);
ResponseConnControl interceptor = new ResponseConnControl();
interceptor.process(response, context);
Header header = response.getFirstHeader(HTTP.CONN_DIRECTIVE);
assertNotNull(header);