code: @Test public void testResponseConnControlHostInvalidInput() throws Exception {
    ResponseConnControl interceptor=new ResponseConnControl();
    try {
      interceptor.process(null,null);
      Assert.fail("IllegalArgumentException should have been thrown");
    }
   catch (  IllegalArgumentException ex) {
    }
    try {
      HttpResponse response=new BasicHttpResponse(HttpVersion.HTTP_1_1,HttpStatus.SC_OK,"OK");
      interceptor.process(response,null);
      Assert.fail("IllegalArgumentException should have been thrown");
    }
   catch (  IllegalArgumentException ex) {
    }
  }
  