我正在尝试为map reduce程序编写一个测试用例，它有两个Map器和一个使用multipleinputsmapreducedriver的reducer。在maven中，我尝试测试以下代码，但出现了一个错误：“没有向secondmapper提供任何输入”。帮我查一下密码。

@Test
public testMapReduceDriver() throws IOException,
InterruptedException {
    Text value1 = new Text("wds,sd,Male,Divorce,8-5-2000");
    Text value2 = new Text("as,wds,asd,2.3,Cas,1/2/2011");
    Text value3 = new Text("ds,wds,assad,4.3,Cash,2/1/2019");
    new MultipleInputsMapReduceDriver<Text, Text, Text, Text>()
    .withMapper(new FirstMapper())
    .withMapper(new SecondMapper())
    .withReducer(new SingleReducer())
    .withAll(new FirstMapper(), Arrays.asList((new Pair<LongWritable, Text>(new LongWritable(0), value1))))
    .withAll(new SecondMapper(), Arrays.asList((new Pair<LongWritable, Text>(new LongWritable(20), value2)),
                                                (new Pair<LongWritable, Text>(new LongWritable(10), value3))))  
    .withAllOutput(Arrays.asList(new Pair<Text,Text>(new Text("Male"),new Text("6.6"))))
    .runTest();
}