### Question:
MatchupGenerator extends BasicTool { static Coincidence createPrimaryCoincidence(Matchup matchup, RelatedObservation o1) { final Coincidence coincidence = createCoincidence(matchup, o1); coincidence.setTimeDifference(0.0); return coincidence; } MatchupGenerator(); static void main(String[] args); @Override void initialize();  }### Answer:
@Test public void testCreatePrimaryCoincidence() { final Matchup matchup = new Matchup(); final RelatedObservation relatedObservation = new RelatedObservation(); final Coincidence coincidence = MatchupGenerator.createPrimaryCoincidence(matchup, relatedObservation); assertNotNull(coincidence); assertSame(matchup, coincidence.getMatchup()); assertSame(relatedObservation, coincidence.getObservation()); assertEquals(0.0, coincidence.getTimeDifference(), 1e-8); }