assertEquals("", item2.getInput());

        StopwordsItem item3 = new StopwordsItem(3, null);
        assertNull(item3.getInput());
    }

    public void test_getInputValue() {
        // Test getInputValue method with various inputs
        StopwordsItem item1 = new StopwordsItem(1, "word");
        assertEquals("word", item1.getInputValue());

        assertEquals("", item2.getInput());

        ProtwordsItem item3 = new ProtwordsItem(3, null);
        assertNull(item3.getInput());
    }

    public void test_getInputValue() {
        // Test getInputValue method with non-null input
        ProtwordsItem item1 = new ProtwordsItem(1, "word");
        assertEquals("word", item1.getInputValue());

        // Test with empty string