code: @Test public void assertGetShardingInfo(){
    when(regCenter.isExisted("/test_job/sharding")).thenReturn(true);
    when(regCenter.getChildrenKeys("/test_job/sharding")).thenReturn(Arrays.asList("0","1","2","3"));
    when(regCenter.get("/test_job/sharding/0/instance")).thenReturn("ip1@-@1234");
    when(regCenter.get("/test_job/sharding/1/instance")).thenReturn("ip2@-@2341");
    when(regCenter.get("/test_job/sharding/2/instance")).thenReturn("ip3@-@3412");
    when(regCenter.get("/test_job/sharding/3/instance")).thenReturn("ip4@-@4123");
    when(regCenter.isExisted("/test_job/instances/ip4@-@4123")).thenReturn(true);
    when(regCenter.isExisted("/test_job/sharding/0/running")).thenReturn(true);
    when(regCenter.isExisted("/test_job/sharding/1/running")).thenReturn(false);
    when(regCenter.isExisted("/test_job/sharding/2/running")).thenReturn(false);
    when(regCenter.isExisted("/test_job/sharding/3/running")).thenReturn(false);
    when(regCenter.isExisted("/test_job/sharding/0/failover")).thenReturn(false);
    when(regCenter.isExisted("/test_job/sharding/1/failover")).thenReturn(true);
    when(regCenter.isExisted("/test_job/sharding/2/disabled")).thenReturn(true);
    int i=0;
    for (  ShardingInfo each : shardingStatisticsAPI.getShardingInfo("test_job")) {
      i++;
      assertThat(each.getItem(),is(i - 1));
  switch (i) {
  case 1:
        assertThat(each.getStatus(),is(ShardingInfo.ShardingStatus.RUNNING));
      assertThat(each.getServerIp(),is("ip1"));
    assertThat(each.getInstanceId(),is("1234"));
  break;
  case 2:
  assertTrue(each.isFailover());
  assertThat(each.getStatus(),is(ShardingInfo.ShardingStatus.SHARDING_FLAG));
  assertThat(each.getServerIp(),is("ip2"));
  assertThat(each.getInstanceId(),is("2341"));
  break;
  case 3:
  assertThat(each.getStatus(),Is.is(ShardingInfo.ShardingStatus.DISABLED));
  assertThat(each.getServerIp(),is("ip3"));
  assertThat(each.getInstanceId(),is("3412"));
  break;
  case 4:
  assertThat(each.getStatus(),Is.is(ShardingInfo.ShardingStatus.PENDING));
  assertThat(each.getServerIp(),is("ip4"));
  assertThat(each.getInstanceId(),is("4123"));
  break;
  default :
  break;
  }
  }
  }
  