如何使用MRUnit Test进行Mapper测试？

我是Hadoop的新手.我想使用MRUnit Test单独测试我的映射器部件.我已经尝试了很多.但我不知道如何解决以下错误 -
"MapDriver类型中的方法setMapper(Mapper)不适用于参数(Recommand.IdIndexMapper)".我使用的是Hadoop-1.2.1,Eclipse Juno,mrunit-1.0.0-hadoop1.jar,junit-4.11,mockito-all-1.9.5.jar.贝娄是我的代码,

我的Mapper类:
类名:推荐,

public static class IdIndexMapper extends MapReduceBase implements Mapper{

        public void map(LongWritable key, Text val, OutputCollector output,Reporter reporter)throws IOException{
            String[] ids;
            String ln=val.toString();
            ids=ln.split("\t");
            output.collect(new Text(ids[0]),new Text(ids[1]));
   // System.out.println(ids[0]+" "+ids[1]);

    }

我的测试代码:

package org.apache.hadoop.examples;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;



import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.examples.WordCount.IntSumReducer;
//import org.apache.hadoop.examples.WordCount.TokenizerMapper;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mrunit.mapreduce.MapDriver;
import org.junit.Before;
import org.junit.Test;
import org.myorg.Recommand.IdIndexMapper;

public class RecomTest {
    MapDriver mapDriver;

     @Before
     public void setUp() throws Exception {
         IdIndexMapper mapper=new IdIndexMapper();
         mapper.configure(new JobConf());
        mapDriver=new MapDriver();
        mapDriver.setMapper(mapper);
     }

    @Test
    public void testMapper() throws IOException {

        final LongWritable inputKey = new LongWritable(0);
         final Text inputValue = new Text("M1023    M1024,M1022,M1025");

         final Text outputKey = new Text("M1023");
         final Text outputValue = new Text("M1024,M1022,M1025");

         mapDriver.withInput(inputKey, inputValue);
         mapDriver.withOutput(outputKey, outputValue);
         mapDriver.runTest();



    }

}

我得到的错误是:

MapDriver类型中的方法setMapper(Mapper)不适用于参数(Recommand.IdIndexMapper)

有人可以帮我解决这个问题吗？