Spring Batch Test Custom Reader

package com.chrisbeech.batch.step;

import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.item.adapter.ItemReaderAdapter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.chrisbeech.batch.mongodb.collections.Client;




@Component
public class Reader extends ItemReaderAdapter<Client> {

     private static final Logger log = LoggerFactory.getLogger(Reader.class);

    private int nextClientIndex;
    private List<Client> clients;

    @Autowired
    public Reader(){
        init();
    }

    // populate in memory array
    private void init(){

        clients = new ArrayList<Client>();

        Client beryl = new Client();
        beryl.setFirstName("Beryl");
        beryl.setLastName("A");
        clients.add(beryl);

        Client frank = new Client();
        beryl.setFirstName("Frank");
        beryl.setLastName("A");
        clients.add(frank);

        Client paul = new Client();
        beryl.setFirstName("Paul");
        beryl.setLastName("A");
        clients.add(paul);

        Client judith = new Client();
        beryl.setFirstName("Judith");
        beryl.setLastName("A");
        clients.add(judith);

        Client lizzy = new Client();
        beryl.setFirstName("Lizzy");
        beryl.setLastName("A");
        clients.add(lizzy);

        Client erin = new Client();
        beryl.setFirstName("Erin");
        beryl.setLastName("A");
        clients.add(erin);

        Client norma = new Client();
        beryl.setFirstName("Norma");
        beryl.setLastName("A");
        clients.add(norma);

        Client danko = new Client();
        beryl.setFirstName("Daniel");
        beryl.setLastName("A");
        clients.add(danko);

        Client kyle = new Client();
        beryl.setFirstName("Kyle");
        beryl.setLastName("A");
        clients.add(kyle);

        Client oscar = new Client();
        beryl.setFirstName("Oscar");
        beryl.setLastName("A");
        clients.add(oscar);

        nextClientIndex = 0;
    }

    // read the people
    public Client read() throws Exception {
        Client nextClient = null;

        if(nextClientIndex < clients.size()){
            nextClient = clients.get(nextClientIndex);
            nextClientIndex++;
            log.info("### Reading in " + nextClientIndex + " : " + nextClient);
        }

        return nextClient;
    }
}