item.setNewInput(null);
        assertEquals("originalword", item.toLineString());
    }

    @Test
    public void test_getId() {
        // Test getId method inherited from DictionaryItem
        ProtwordsItem item1 = new ProtwordsItem(0, "word");
        assertEquals(0, item1.getId());

        ProtwordsItem item2 = new ProtwordsItem(999, "word");
        assertEquals(999, item2.getId());

        assertEquals(42L, item.getId());
    }

    @Test
    public void test_getCreatedBy_getCreatedTime() {
        // Test inherited methods from DictionaryItem
        CharMappingItem item = new CharMappingItem(1L, new String[] { "input" }, "output");

        // Test basic properties that exist
        assertNotNull(item.getInputs());