@Test public void testGroupBy() { final int entries = 16; BulletConfig bulletConfig = GroupByTest.makeConfiguration(entries); GroupBy groupBy = GroupByTest.makeGroupBy(bulletConfig, singletonMap("fieldA", "A"), entries, AggregationUtils.makeGroupOperation(COUNT, null, "cnt"), AggregationUtils.makeGroupOperation(SUM, "fieldB", "sumB")); byte[] first = groupBy.getData(); groupBy = GroupByTest.makeGroupBy(bulletConfig, singletonMap("fieldA", "A"), entries, AggregationUtils.makeGroupOperation(COUNT, null, "cnt"), AggregationUtils.makeGroupOperation(SUM, "fieldB", "sumB"));