Map<RowKey, EventData> mergeMap = new MapMaker().makeMap();
DbLoadMerger.merge(makeInsertEventData(), mergeMap);
DbLoadMerger.merge(makeUpdateEventData(), mergeMap);
for (Entry<RowKey, EventData> entry : mergeMap.entrySet()) {
RowKey key = entry.getKey();
EventColumn keyColumn = key.getKeys().get(0);
Assert.assertEquals(KEY_VALUE, keyColumn.getColumnValue());
Assert.assertEquals(KEY_NAME, keyColumn.getColumnName());
EventData eventData = entry.getValue();