@Override
    protected void setUp(TestInfo testInfo) throws Exception {
        super.setUp(testInfo);

        // Create a temporary test file
        testFile = File.createTempFile("test_mapping", ".txt");
        testFile.deleteOnExit();
        // Ensure the test file is initially empty
        try (java.io.FileWriter fw = new java.io.FileWriter(testFile)) {
            fw.write("");
        }