如何在Spring Boot中对ApplicationListener的onApplicationEvent方法进行单元测试？

如何解决如何在Spring Boot中对ApplicationListener的onApplicationEvent方法进行单元测试？

我们正在使用@Slf4j @requiredArgsConstructor @Component public class CacheLoadListener implements ApplicationListener<ApplicationReadyEvent> { private final CacheManager cacheManager; private final FooRepository fooRepository; private final FoodomainToDtoMapper foodomainToDtoMapper; @Override public void onApplicationEvent(@NonNull ApplicationReadyEvent applicationReadyEvent) { initfooCache(); } private void initfooCache() { log.info("Initializing foo cache"); Cache fooCache = cacheManager.getCache("fooCache"); fooRepository.findAll().stream() .map(foodomainToDtoMapper::mapDomainToDto) .forEach(FooDto -> { if (fooCache != null) { fooCache.put(FooDto.getIdLkFoo(),FooDto); } } ); } } 在应用程序启动时加载缓存。它是查找数据，我们希望在应用程序启动期间用此数据填充缓存。

    @ExtendWith(MockitoExtension.class)
    class CacheLoadListenerITest {
    
        @Mock
        private CacheManager cacheManager;
    
        @Mock
        private FooRepository fooRepository;

        @Mock
        private ApplicationReadyEvent applicationReadyEvent;
    
        @InjectMocks
        CacheLoadListener cacheLoadListener;
    
        @BeforeEach
        void setUp() {
            cacheLoadListener = new CacheLoadListener(cacheManager,fooRepository,new FoodomainToDtoMapper());
        }
        //Trying to do something like:
         @Test
        public void testCacheLoadListener() {
          //how to check if it is loading cache on startup and whether applicationReadyEvent is getting called?
           when(cacheManager.getCache("fooCache")).thenReturn((Cache) new 
           ConcurrentMapCache("fooCache"));
           when(fooRepository.findAll()).thenReturn(getfooEntityList());
           cacheLoadListener.onApplicationEvent(applicationReadyEvent);
           verify(fooRepository).findAll();
        }
        
    }

我正在尝试将单元测试编写为：

initfooCache()

测试运行正常，但根本看不到测试范围。调试期间，控件进入CacheLoadListener内部。是否有任何方法可以测试此onApplicationEvent或从中调用的这些私有方法{{1}}吗？