assertFalse(mixedBoolEnv.isFrameworkDebug());
        assertTrue(mixedBoolEnv.isMailSendMock());
    }

    // Test property override behavior
    public void xtest_propertyOverride() {
        FessEnv.SimpleImpl overrideEnv = new FessEnv.SimpleImpl() {
            protected Properties prepareProperties() {
                Properties props = new Properties();