// Non-zero id should not auto-set newInput
        StopwordsItem existingItem = new StopwordsItem(1, "existingword");
        assertFalse(existingItem.isUpdated());
        assertNull(existingItem.getNewInput());
        assertEquals("existingword", existingItem.toLineString());
    }

    public void test_multipleUpdates() {
        // Test multiple updates to newInput

    }

    public void test_constructor_withNonZeroId() {
        // Test constructor with id != 0 (existing item)
        ProtwordsItem item = new ProtwordsItem(123, "existingword");

        assertEquals(123, item.getId());
        assertEquals("existingword", item.getInput());
        assertNull(item.getNewInput());
    }

    public void test_getNewInput() {
        // Test getNewInput method