assertEquals("opensearch", value2);
        assertFalse(value1.equals(value2));
    }

    // Test empty string property value
    @Test
    public void test_get_emptyStringValue() {
        String testKey = "empty.property";
        System.setProperty(Constants.FESS_CONFIG_PREFIX + testKey, "");

        try {
            String value = fessConfig.get(testKey);