@Test
  public void testSumDoubleSimple() throws HiveException {
    testAggregateDouble(
        "sum",
        2,
        Arrays.asList(new Object[]{13.0,5.0,7.0,19.0}),
        13.0 + 5.0 + 7.0 + 19.0);
  }
Unit test for the vectorized GROUP BY operator.
ql/src/test/org/apache/hadoop/hive/ql/exec/vector/TestVectorGroupByOperator.java