protected ReplicaId getNewReplicaToAdd(MockClusterMap clusterMap) {
    DataNodeId currentNode = clusterMap.getDataNodeIds().get(0);
    PartitionId newPartition = clusterMap.createNewPartition(clusterMap.getDataNodes());
    return newPartition.getReplicaIds().stream().filter(r -> r.getDataNodeId() == currentNode).findFirst().get();
  }
Verify remote replica info is/isn't present in given {@link PartitionInfo}.
@param partitionInfo the {@link PartitionInfo} to check if it contains remote replica info
@param remoteReplica remote replica to check
@param shouldExist if {@code true}, remote replica info should exist. {@code false} otherwise
ambry-replication/src/test/java/com/github/ambry/replication/ReplicationTestHelper.java