// 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) {

        // 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);

        /**
         * 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());

        }
        return OptionalEntity.empty();
    }

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

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

        }
        return OptionalEntity.empty();
    }

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

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

        assertNotNull(stopwordsFile.stopwordsItemList);
    }

    // Test selectList method
    @Test
    public void test_selectList_normalCase() {
        loadTestData();

        DictionaryFile.PagingList<StopwordsItem> result = stopwordsFile.selectList(0, 2);
        assertEquals(2, result.size());
        assertEquals(1, result.getCurrentPageNumber());
        assertEquals(2, result.getPageSize());