FessProp.propMap.clear();
        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override
            public String getCrawlerDocumentSpaceChars() {
                return "u0020u3000";
            }
        };

        int[] chars = fessConfig.getCrawlerDocumentSpaceCharsAsArray();
        assertEquals(2, chars.length);
        assertEquals(32, chars[0]);