@Test
public void testConvertRecoveringBlock() {

  DatanodeInfo di1 = DFSTestUtil.getLocalDatanodeInfo();
  DatanodeInfo di2 = DFSTestUtil.getLocalDatanodeInfo();
  DatanodeInfo[] dnInfo = new DatanodeInfo[] { di1, di2 };
  RecoveringBlock b = new RecoveringBlock(getExtendedBlock(), dnInfo, 3);
  RecoveringBlockProto bProto = PBHelper.convert(b);
  RecoveringBlock b1 = PBHelper.convert(bProto);
  assertEquals(b.getBlock(), b1.getBlock());
  DatanodeInfo[] dnInfo1 = b1.getLocations();
  assertEquals(dnInfo.length, dnInfo1.length);
  for (int i=0; i < dnInfo.length; i++) {
    compare(dnInfo[0], dnInfo1[0]);
  }
}