code: @Test public void testLoadMonitor() throws Exception {
    System.setProperty("dubbo.monitor.address","monitor-addr:12080");
    System.setProperty("dubbo.monitor.protocol","monitor");
    InterfaceConfig interfaceConfig=new InterfaceConfig();
    URL url=interfaceConfig.loadMonitor(new URL("dubbo","addr1",9090));
    TestCase.assertEquals("monitor-addr:12080",url.getAddress());
    TestCase.assertEquals(MonitorService.class.getName(),url.getParameter("interface"));
    TestCase.assertNotNull(url.getParameter("dubbo"));
    TestCase.assertNotNull(url.getParameter("pid"));
    TestCase.assertNotNull(url.getParameter("timestamp"));
  }
  