assertTrue(item1.equals(item2));

        // Item with null input should not equal item with non-null input
        assertFalse(item3.equals(item1));
        assertFalse(item1.equals(item3));

        // Symmetry
        assertTrue(item1.equals(item2));
        assertTrue(item2.equals(item1));
    }

    @Test
    public void test_toString() {
        // Test toString method

        StopwordsItem item3 = new StopwordsItem(1, "word");

        // Two items with null input should be equal
        assertTrue(item1.equals(item2));

        // Item with null input should not equal item with non-null input
        assertFalse(item3.equals(item1));
        assertFalse(item1.equals(item3));

        // Symmetry
        assertTrue(item1.equals(item2));

        List<String> initialList = new ArrayList<>();
        initialList.add("item1");
        initialList.add("item2");
        dataMap.put("items", initialList);

        // Add a new value
        transformer.putResultDataBody(dataMap, "items", "item3");

        Object result = dataMap.get("items");
        assertTrue(result instanceof Object[]);
        Object[] resultArray = (Object[]) result;

        assertFalse(item1.equals(item3));

        // Item with null output should not equal item with different inputs
        CharMappingItem item4 = new CharMappingItem(4L, inputs3, null);
        assertFalse(item1.equals(item4));

        // Symmetry
        assertTrue(item1.equals(item2));
        assertTrue(item2.equals(item1));
    }

    @Test
    public void test_toString() {

        assertTrue(result.isPresent());
        assertEquals(testValue, result.get());
    }

    @Test
    public void test_ofNullable_withList() {
        List<String> testValue = Arrays.asList("item1", "item2", "item3");
        OptionalEntity<List<String>> result = OptionalUtil.ofNullable(testValue);

        assertNotNull(result);
        assertTrue(result.isPresent());
        assertEquals(testValue, result.get());

    public void test_evaluate_withArrayParameter() {
        String template = "Items: ${items}";
        Map<String, Object> paramMap = new HashMap<>();
        String[] items = { "item1", "item2", "item3" };
        paramMap.put("items", items);

        Object result = scriptEngine.evaluate(template, paramMap);
        assertTrue(result.toString().contains("item1"));
    }

    // Test evaluate method returns different object type

        final List<String> items = List.of("item1", "item2", "item3");
        chatApiManager.sendSseEvent(writer, "test", Map.of("items", items));

        final String output = stringWriter.toString();
        assertTrue(output.contains("event: test"));
        assertTrue(output.contains("["));
        assertTrue(output.contains("item1"));
        assertTrue(output.contains("item2"));

     */
    @Test
    public void test_serializeDeserialize_list() {
        List<String> original = new ArrayList<>();
        original.add("item1");
        original.add("item2");
        original.add("item3");

        byte[] serialized = serializer.fromObjectToBinary(original);
        assertNotNull(serialized, "Serialized data should not be null");

        assertEquals(2, result.size());

        CharMappingItem item1 = result.get(0);
        assertArrayEquals(new String[] { "α", "β" }, item1.getInputs());
        assertEquals("γ", item1.getOutput());

        CharMappingItem item2 = result.get(1);
        assertArrayEquals(new String[] { "中", "文" }, item2.getInputs());
        assertEquals("字", item2.getOutput());
    }

    // Test with very long input line

        // Test getting non-existing item
        OptionalEntity<ProtwordsItem> item = protwordsFile.get(999);
        assertFalse(item.isPresent());
    }

    @Test
    public void test_get_withUnloadedData() {
        // Test getting item when data is not loaded yet
        OptionalEntity<ProtwordsItem> item = protwordsFile.get(1);
        assertTrue(item.isPresent());
        assertEquals("test1", item.get().getInput());
    }