如何测试Exception上发生日志的时间

Question

如何使用Exception测试以下代码在引发Mockito时执行日志记录语句？

public void cleanUp() {    
    for (Map.Entry<String, Connection> connection : dbConnectionMap.entrySet()) {
       try {
           if (connection.getValue() != null) {
              connection.getValue().close();
           }
       }catch (Exception e) {
           LOGGER.log(Level.WARNING, "Exception when closing database connection: ", e);
       }
    }
    reset();
}