### Question:
IndexWordSet { public String getLemma() { return lemma; } IndexWordSet(String lemma); void add(IndexWord word); void remove(POS p); int size(); IndexWord getIndexWord(POS p); IndexWord[] getIndexWordArray(); Collection<IndexWord> getIndexWordCollection(); Set<POS> getValidPOSSet(); boolean isValidPOS(POS pos); int getSenseCount(POS pos); String toString(); String getLemma(); @Override boolean equals(Object object); @Override int hashCode();  }### Answer:
@Test public void testConstructor() { IndexWordSet iws = new IndexWordSet("test"); Assert.assertEquals("test", iws.getLemma()); }