@Test
    public void test_createMode() {
        // Test special behavior when id is 0 (create mode)
        StopwordsItem createItem = new StopwordsItem(0, "newword");
        assertTrue(createItem.isUpdated());
        assertEquals("newword", createItem.getNewInput());
        assertEquals("newword", createItem.toLineString());

        // Non-zero id should not auto-set newInput