service.deleteAll();

        // Verify
        verify(dataHelper).clearUrlQueueList();
    }

    public void test_updateSessionId() {
        // Setup
        String oldSessionId = "oldSession";
        String newSessionId = "newSession";
        Queue<UrlQueueImpl<Long>> mockQueue = new LinkedList<>();

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

        // Execute