private static byte[][] makeN(byte[] base, int n) {
    byte[][] ret = new byte[n][];
    for (int i = 0; i < n; i++) {
      ret[i] = Bytes.add(base, Bytes.toBytes(String.format("%02d", i)));
    }
    return ret;
  }
TestEndpoint: test cases to verify the batch execution of coprocessor Endpoint
hbase-endpoint/src/test/java/org/apache/hadoop/hbase/coprocessor/TestBatchCoprocessorEndpoint.java