assertFalse(stemmerOverrideItem1.equals(new StemmerOverrideItem(2, "bbb", "a")));
        assertFalse(stemmerOverrideItem1.equals(new StemmerOverrideItem(2, "aaa", "b")));
    }

    @Test
    public void test_toLineString() {
        assertEquals("aaa=>a", new StemmerOverrideItem(1, "aaa", "a").toLineString());
        assertEquals("=>", new StemmerOverrideItem(1, "", "").toLineString());
    }

        assertFalse(kuromojiItem1.equals(new KuromojiItem(1, "t1", "s1", "R1", "p1")));
        assertFalse(kuromojiItem1.equals(new KuromojiItem(1, "t1", "s1", "r1", "P1")));
    }

    @Test
    public void test_toLineString() {
        assertEquals("t1,s1,r1,p1", new KuromojiItem(1, "t1", "s1", "r1", "p1").toLineString());
        assertEquals("t\"\"1,s\"\"1,r\"\"1,p\"\"1", new KuromojiItem(1, "t\"1", "s\"1", "r\"1", "p\"1").toLineString());

        ProtwordsItem item2 = new ProtwordsItem(0, "createword");
        assertEquals("ProtwordsItem [id=0, inputs=createword, newInputs=createword]", item2.toString());
    }

    @Test
    public void test_toLineString() {
        // Test toLineString method with non-updated item
        ProtwordsItem item = new ProtwordsItem(1, "word");
        assertEquals("word", item.toLineString());

        // Test with updated item

        assertFalse(synonymItem1.equals(new SynonymItem(2, new String[] { "A" }, new String[] { "b" })));
    }

    @Test
    public void test_toLineString() {
        assertEquals("a1,a2,a3=>b1,b2,b3",
                new SynonymItem(1, new String[] { "a1", "a2", "a3" }, new String[] { "b1", "b2", "b3" }).toLineString());

        item.setNewInput("");
        assertEquals("StopwordsItem [id=123, inputs=word, newInputs=]", item.toString());
    }

    @Test
    public void test_toLineString() {
        // Test toLineString method
        StopwordsItem item = new StopwordsItem(1, "original");
        assertEquals("original", item.toLineString());

        // When updated, should return newInput