@Test
    public void test_hashCode() {
        // Test hashCode method
        StopwordsItem item1 = new StopwordsItem(1, "test");
        StopwordsItem item2 = new StopwordsItem(1, "test");
        StopwordsItem item3 = new StopwordsItem(2, "test");
        StopwordsItem item4 = new StopwordsItem(1, "different");

        // Same input should have same hashCode regardless of id
        assertEquals(item1.hashCode(), item2.hashCode());

    public void test_updater_updateItem() {
        loadTestData();

        StopwordsItem originalItem = stopwordsFile.get(1).get();
        StopwordsItem updateItem = new StopwordsItem(1, "the");
        updateItem.setNewInput("modified");

        StopwordsFile.StopwordsUpdater updater = stopwordsFile.new StopwordsUpdater(updateItem);

        StopwordsItem result = updater.write(originalItem);
        assertNotNull(result);

    }

    @Override
    public synchronized OptionalEntity<StopwordsItem> get(final long id) {
        if (stopwordsItemList == null) {
            reload(null);
        }

        for (final StopwordsItem StopwordsItem : stopwordsItemList) {
            if (id == StopwordsItem.getId()) {
                return OptionalEntity.of(StopwordsItem);
            }
        }
        return OptionalEntity.empty();
    }

    //                                                                        ============

    private static OptionalEntity<StopwordsItem> getEntity(final CreateForm form) {
        switch (form.crudMode) {
        case CrudMode.CREATE:
            final StopwordsItem entity = new StopwordsItem(0, StringUtil.EMPTY);
            return OptionalEntity.of(entity);
        case CrudMode.EDIT:
            if (form instanceof EditForm) {