List<SortedKeyValueIterator<Key,Value>> sources = new ArrayList<SortedKeyValueIterator<Key,Value>>(3);
sources.add(new SortedMapIterator(tm1));
sources.add(new SortedMapIterator(tm2));
sources.add(new SortedMapIterator(tm3));
MultiIterator mi = new MultiIterator(sources, true);
ai.init(mi, is.getOptions(), null);
ai.seek(new Range(), EMPTY_COL_FAMS, false);
assertTrue(ai.hasTop());
assertEquals(nk(1, 1, 1, 1), ai.getTopKey());