### Question:
PositionListIndex { public long size() { return clusters.size(); } PositionListIndex(List<LongArrayList> clusters);  PositionListIndex(); PositionListIndex intersect(PositionListIndex otherPLI); List<LongArrayList> getClusters(); @Override PositionListIndex clone(); @Override int hashCode(); @Override boolean equals(Object obj); Long2LongOpenHashMap asHashMap(); long size(); boolean isEmpty(); boolean isUnique(); long getRawKeyError();  }### Answer:
@Test public void testSize() { PositionListIndex pli = fixture.getFirstPLI(); assertEquals(fixture.getFirstPLISize(), pli.size()); }