assertTrue(e.getMessage().contains("non.existent.boolean"));
        }
    }

    // Test getTimeAdjustTimeMillisAsLong with invalid number format
    public void xtest_getTimeAdjustTimeMillisAsLong_invalidFormat() {
        FessEnv.SimpleImpl customEnv = new FessEnv.SimpleImpl() {
            protected Properties prepareProperties() {
                Properties props = new Properties();