@Override
    public String toString() {
      return "(" + myInt + "," + myText +")";
    }
Test the RecordReader when there is a new base and a delta.
This test creates multiple stripes in both base and delta files which affects how many splits
are created on read.  With ORC-228 this could be done in E2E fashion with a query or
streaming ingest writing data.
@see #testRecordReaderOldBaseAndDelta()
@throws Exception
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestOrcRawRecordMerger.java