// aggregate existing stats
String rows0 = statsAggregator.aggregateStats("file_00000", StatsSetupConst.ROW_COUNT);
assertEquals("500", rows0);
String usize0 = statsAggregator.aggregateStats("file_00000",
StatsSetupConst.RAW_DATA_SIZE);
assertEquals("2000", usize0);
// update which should not take any effect - plus the map published is a supset of supported
// stats