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();

        String[] keywords = { "java", "crawler", "testing" };
        data.putValues("keywords", keywords);