### Question:
StatisticManager { public void shutdown() { scheduler.shutdown(); } private  StatisticManager(final CoordinatorRegistryCenter registryCenter, final Optional<JobEventRdbConfiguration> jobEventRdbConfiguration,
                             final StatisticsScheduler scheduler, final Map<StatisticInterval, TaskResultMetaData> statisticData); static StatisticManager getInstance(final CoordinatorRegistryCenter regCenter, final Optional<JobEventRdbConfiguration> jobEventRdbConfiguration); void startup(); void shutdown(); void taskRunSuccessfully(); void taskRunFailed(); TaskResultStatistics getTaskResultStatisticsWeekly(); TaskResultStatistics getTaskResultStatisticsSinceOnline(); TaskResultStatistics findLatestTaskResultStatistics(final StatisticInterval statisticInterval); List<TaskResultStatistics> findTaskResultStatisticsDaily(); JobTypeStatistics getJobTypeStatistics(); JobExecutionTypeStatistics getJobExecutionTypeStatistics(); List<TaskRunningStatistics> findTaskRunningStatisticsWeekly(); List<JobRunningStatistics> findJobRunningStatisticsWeekly(); List<JobRegisterStatistics> findJobRegisterStatisticsSinceOnline();  }### Answer:
@Test public void assertShutdown() throws NoSuchFieldException { ReflectionUtils.setFieldValue(statisticManager, "scheduler", scheduler); statisticManager.shutdown(); Mockito.verify(scheduler).shutdown(); }