### Question:
CacheService { public void handleUpdateCache(IslStatusUpdateNotification notification) { if (notification.getStatus() == IslStatus.MOVED || notification.getStatus() == IslStatus.INACTIVE) { Endpoint source = Endpoint.of(notification.getSrcSwitchId(), notification.getSrcPortNo()); Endpoint destination = Endpoint.of(notification.getDstSwitchId(), notification.getDstPortNo()); cache.remove(source); cache.remove(destination); log.info("Remove ISL {}_{} ===> {}_{} from isl latency cache", notification.getSrcSwitchId(), notification.getSrcPortNo(), notification.getDstSwitchId(), notification.getDstPortNo()); } } CacheService(CacheCarrier carrier, RepositoryFactory repositoryFactory); void handleUpdateCache(IslStatusUpdateNotification notification); void handleGetDataFromCache(IslRoundTripLatency roundTripLatency);  }### Answer:
@Test() public void handleUpdateCacheInactiveTest() { IslStatusUpdateNotification notification = new IslStatusUpdateNotification(SWITCH_ID_1, PORT_1, SWITCH_ID_2, PORT_2, INACTIVE); updateIslStatus(SWITCH_ID_1, PORT_1, SWITCH_ID_2, PORT_2, INACTIVE); updateIslStatus(SWITCH_ID_2, PORT_2, SWITCH_ID_1, PORT_1, INACTIVE); cacheService.handleUpdateCache(notification); IslRoundTripLatency forward = new IslRoundTripLatency(SWITCH_ID_1, PORT_1, 1, 0L); checkHandleGetDataFromCache(forward, SWITCH_ID_2, PORT_2); IslRoundTripLatency reverse = new IslRoundTripLatency(SWITCH_ID_2, PORT_2, 1, 0L); checkHandleGetDataFromCache(reverse, SWITCH_ID_1, PORT_1); }