@Test
  public void testSumLong2MinInt () throws HiveException {
    testAggregateLongAggregate(
        "sum",
        2,
        Arrays.asList(new Long[]{(long)Integer.MIN_VALUE, (long)Integer.MIN_VALUE}),
        -4294967296L);
  }
Unit test for the vectorized GROUP BY operator.
ql/src/test/org/apache/hadoop/hive/ql/exec/vector/TestVectorGroupByOperator.java