public void test_command_string_edge_cases() throws Exception {
        // Test with commands containing special characters
        final List<String> specialCommands = Arrays.asList("echo \"test with quotes\"", "echo 'test with single quotes'",
                "echo test with spaces", "echo test&with&ampersand", "echo test|with|pipe");

        generator.setCommandList(specialCommands);

        }
        source = source.replaceAll(Pattern.quote("${fess.dictionary.path}"), dictionaryPath)//
                .replaceAll(Pattern.quote("${fess.index.codec}"), fessConfig.getIndexCodec())//
                .replaceAll(Pattern.quote("${fess.index.number_of_shards}"), numberOfShards)//
                .replaceAll(Pattern.quote("${fess.index.auto_expand_replicas}"), autoExpandReplicas);

        final String p = path.trim();
        if (p.startsWith("#")) {
            return StringUtils.EMPTY;
        }

        if (p.startsWith(GsaConfigParser.CONTAINS)) {
            return ".*" + Pattern.quote(p.substring(GsaConfigParser.CONTAINS.length())) + ".*";
        }

        if (p.startsWith(GsaConfigParser.REGEXP)) {
            return p.substring(GsaConfigParser.REGEXP.length());
        }