Queue<UrlQueueImpl<Long>> mockQueue = new LinkedList<>();

        when(dataHelper.getUrlQueueList(oldSessionId)).thenReturn(mockQueue);

        // Execute
        service.updateSessionId(oldSessionId, newSessionId);

        // Verify
        verify(dataHelper).getUrlQueueList(oldSessionId);
        verify(dataHelper).addUrlQueueList(newSessionId, mockQueue);