// Mock FessConfig
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public Integer getPageDocboostMaxFetchSizeAsInteger() {
                return 100;
            }
        });

        try {
            List<BoostDocumentRule> rules = webFsIndexHelper.getAvailableBoostDocumentRuleList();

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getPageDocboostMaxFetchSizeAsInteger();

    /**
     * Get the value for the key 'page.keymatch.max.fetch.size'. <br>
     * The value is, e.g. 1000 <br>
     * comment: Maximum number of keymatch records to fetch per page.