@Test
public void testDataNodeInfoPBHelper() {

  DatanodeID id = DFSTestUtil.getLocalDatanodeID();
  DatanodeInfo dnInfos0 = new DatanodeInfoBuilder().setNodeID(id)
      .build();
  dnInfos0.setCapacity(3500L);
  dnInfos0.setDfsUsed(1000L);
  dnInfos0.setNonDfsUsed(2000L);
  dnInfos0.setRemaining(500L);
  HdfsProtos.DatanodeInfoProto dnproto = PBHelperClient.convert(dnInfos0);
  DatanodeInfo dnInfos1 = PBHelperClient.convert(dnproto);
  compare(dnInfos0, dnInfos1);
  assertEquals(dnInfos0.getNonDfsUsed(), dnInfos1.getNonDfsUsed());
  //Testing without nonDfs field
  HdfsProtos.DatanodeInfoProto.Builder b =
      HdfsProtos.DatanodeInfoProto.newBuilder();
  b.setId(PBHelperClient.convert(id)).setCapacity(3500L).setDfsUsed(1000L)
      .setRemaining(500L);
  DatanodeInfo dnInfos3 = PBHelperClient.convert(b.build());
  assertEquals(dnInfos0.getNonDfsUsed(), dnInfos3.getNonDfsUsed());
}