assertEquals("  word  ", item1.getInput());
        assertEquals("  word  ", item1.toLineString());

        ProtwordsItem item2 = new ProtwordsItem(2, "\tword\n");
        assertEquals("\tword\n", item2.getInput());
        assertEquals("\tword\n", item2.toLineString());

        ProtwordsItem item3 = new ProtwordsItem(3, " ");
        assertEquals(" ", item3.getInput());
        assertEquals(" ", item3.toLineString());

    }

    public void test_specialCharacters() throws Exception {
        // Test with special characters
        String content = "test1\n" + "日本語\n" + "word with spaces\n" + "\ttab\tword\t\n";

        // Write content to test file
        writeTestFile(content);

        // Reload the file
        protwordsFile.reload(null);