$ mvn -o -B test -Dtest=HibernateSearchTest#massIndexer_rebuildsTheIndexFromTheDatabase
(trimmed to the test's own RESULT line)

RESULT[search-mass-indexer]: hits before purge=1 | hits after workspace().purge() (row still in H2, index emptied)=0 | hits after massIndexer(Movie.class).startAndWait() (index rebuilt straight from the database, no re-persisting)=1.