// Test with offset out of bounds
        PagingList<ProtwordsItem> list = protwordsFile.selectList(100, 10);
        assertEquals(0, list.size());
        assertTrue(list.isEmpty());
    }

    @Test
    public void test_selectList_negativeOffset() {
        // Load data first
        protwordsFile.reload(null);

        // Test with negative offset
        PagingList<ProtwordsItem> list = protwordsFile.selectList(-1, 10);

     * @return a PagingList containing the requested subset of mapping items
     */
    @Override
    public synchronized PagingList<CharMappingItem> selectList(final int offset, final int size) {
        if (mappingItemList == null) {
            reload(null);
        }

        if (offset >= mappingItemList.size() || offset < 0) {

    }

    @Test
    public void test_selectList() {
        final PagingList<KuromojiItem> itemList1 = kuromojiFile.selectList(0, 20);
        assertEquals(3, itemList1.size());
        assertEquals(3, itemList1.getAllRecordCount());
        assertEquals(1, itemList1.getCurrentPageNumber());
        assertEquals(20, itemList1.getPageSize());

        final PagingList<KuromojiItem> itemList2 = kuromojiFile.selectList(2, 2);

        // Get all items
        PagingList<CharMappingItem> result1 = charMappingFile.selectList(0, 10);
        assertEquals(3, result1.size());
        assertEquals(3, result1.getAllRecordCount());
        assertEquals(1, result1.getAllPageCount());

        // Get first two items
        PagingList<CharMappingItem> result2 = charMappingFile.selectList(0, 2);

    @Test
    public void test_selectList() {
        final PagingList<SynonymItem> itemList1 = synonymFile.selectList(0, 20); // error occurs
        assertEquals(5, itemList1.size());
        assertEquals(5, itemList1.getAllRecordCount());
        assertEquals(1, itemList1.getCurrentPageNumber());
        assertEquals(20, itemList1.getPageSize());

        final PagingList<SynonymItem> itemList2 = synonymFile.selectList(4, 2);

    @Test
    public void test_selectList() {
        final PagingList<StemmerOverrideItem> itemList1 = stemmerOverrideFile.selectList(0, 20); // error occurs
        assertEquals(3, itemList1.size());
        assertEquals(3, itemList1.getAllRecordCount());
        assertEquals(1, itemList1.getCurrentPageNumber());
        assertEquals(20, itemList1.getPageSize());

        final PagingList<StemmerOverrideItem> itemList2 = stemmerOverrideFile.selectList(2, 2);

        /**
         * Creates a new PagingList with the specified parameters.
         *
         * @param list the underlying list of items for this page
         * @param offset the starting offset for this page
         * @param size the page size
         * @param allRecordCount the total number of records across all pages
         */

        }
        return OptionalEntity.empty();
    }

    @Override
    public synchronized PagingList<ProtwordsItem> selectList(final int offset, final int size) {
        if (protwordsItemList == null) {
            reload(null);
        }

        if (offset >= protwordsItemList.size() || offset < 0) {
            return new PagingList<>(Collections.<ProtwordsItem> emptyList(), offset, size, protwordsItemList.size());
        }

        }
        return OptionalEntity.empty();
    }

    @Override
    public synchronized PagingList<StopwordsItem> selectList(final int offset, final int size) {
        if (stopwordsItemList == null) {
            reload(null);
        }

        if (offset >= stopwordsItemList.size() || offset < 0) {
            return new PagingList<>(Collections.<StopwordsItem> emptyList(), offset, size, stopwordsItemList.size());
        }

        return OptionalEntity.empty();
    }

    @Override
    public synchronized PagingList<StemmerOverrideItem> selectList(final int offset, final int size) {
        if (stemmerOverrideItemList == null) {
            reload(null);
        }

        if (offset >= stemmerOverrideItemList.size() || offset < 0) {
            return new PagingList<>(Collections.<StemmerOverrideItem> emptyList(), offset, size, stemmerOverrideItemList.size());