assertEquals(1, titleValues.length);
        assertEquals("Test Title", titleValues[0]);

        String[] authorValues = data.getValues("author");
        assertNotNull(authorValues);
        assertEquals(1, authorValues.length);
        assertEquals("John Doe", authorValues[0]);
    }

    public void test_putValues() {
        // Test putValues method
        ExtractData data = new ExtractData();