Mockito无法模拟Hadoop映射器上下文

import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mrunit.mapreduce.MapDriver;
import org.apache.hadoop.mrunit.types.Pair;
import org.junit.Before;
import org.junit.Test;

public class MyMapperTest {
    private MapDriver<Object, Text, Text, IntWritable> mapDriver;

    @Before
    public void setUp() {
        MyMapper mapper = new MyMapper();
        mapDriver = MapDriver.newMapDriver(mapper);
    }

    @Test
    public void testMapper() {
        // 设置输入数据
        mapDriver.withInput(new LongWritable(1), new Text("input"));

        // 设置期望的输出结果
        mapDriver.withOutput(new Text("output"), new IntWritable(1));

        // 运行测试
        mapDriver.runTest();
    }
}