TestTupleWritable.java 文件源码

public void testWritable() throws Exception {
  Random r = new Random();
  Writable[] writs = {
    new BooleanWritable(r.nextBoolean()),
    new FloatWritable(r.nextFloat()),
    new FloatWritable(r.nextFloat()),
    new IntWritable(r.nextInt()),
    new LongWritable(r.nextLong()),
    new BytesWritable("dingo".getBytes()),
    new LongWritable(r.nextLong()),
    new IntWritable(r.nextInt()),
    new BytesWritable("yak".getBytes()),
    new IntWritable(r.nextInt())
  };
  TupleWritable sTuple = makeTuple(writs);
  ByteArrayOutputStream out = new ByteArrayOutputStream();
  sTuple.write(new DataOutputStream(out));
  ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
  TupleWritable dTuple = new TupleWritable();
  dTuple.readFields(new DataInputStream(in));
  assertTrue("Failed to write/read tuple", sTuple.equals(dTuple));
}