assertEquals("java", retrievedKeywords[0]);
        assertEquals("crawler", retrievedKeywords[1]);
        assertEquals("testing", retrievedKeywords[2]);
    }

    public void test_putValuesOverwrite() {
        // Test that putValues overwrites existing values
        ExtractData data = new ExtractData();

        data.putValue("key", "old_value");
        String[] oldValues = data.getValues("key");