Mockito注入不适用于构造函数和setter模拟

Question

@Autowired
private BetRepository betRepository;

public void setBetRepository(BetRepository betRepository) {
this.betRepository = betRepository;
}


public TournamentScoringCache(TournamentScoringCacheInitializer cacheInitializer,
        ScoringEngineInitializer scoringEngineInitializer) {
    tournamentUserStates = cacheInitializer.initCache();
    scoringEngines = scoringEngineInitializer.initEngines();
}

public <T extends SideScore> void updateGameScore(Long tournamentId, Long gameId, MatchScore<T> score) {
    Map<Long, UserTournamentState> userStates = tournamentUserStates.get(tournamentId);
    ScoringEngine<?> scoringEngine = scoringEngines.get(tournamentId);
    List<Bet> bets = betRepository.getBetsByGameId(gameId);  //HERE IS WHERE I GET THE NPE
....
}

@Mock
BetRepository betRepository;
@Mock
TournamentScoringCacheInitializer cacheInitializer;
@Mock
ScoringEngineInitializer engineInitializer;

@InjectMocks
private TournamentScoringCacheAndDB tournamentScoringCache;

@Test
public void testUpdateGameScore() {
....        
when(cacheInitializer.initCache()).thenReturn(utss);
    when(betRepository.getBetsByGameId(1L)).thenReturn(createBets());
    when(engineInitializer.initEngines()).thenReturn(createEngines());
    when(engine.getBetScore(bet1, score)).thenReturn(betScore);
    when(engine.getBetScore(bet2, score)).thenReturn(betScore2);

    tournamentScoringCache.updateGameScore(tournamentId, gameId, score);
....
}

谢了！

Answer 1

是的，@injectmocks注释使Mockito要么执行构造函数注入，要么执行setter/field注入，但不能同时执行两者。选择的规则相当复杂，这也是我尽可能避免使用@injectmocks的原因之一。

总而言之，Mockito首先从类的构造函数中选择一个，然后分析该构造函数是否可以用于构造函数注入。它选择的那个将永远是具有最多参数的那个。如果有几个构造函数具有相同数量的参数，那么将选择哪一个是未定义的。

如果所选构造函数的一个或多个参数的类型是基元类型、最终类或私有类，则不使用构造函数注入。即使可以使用其他构造函数。