private String deleteIndex;
    private QueryBuilder deleteQuery;
    private String expiresFieldName;
    private String documentUpdateIndex;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        purgeDocJob = new PurgeDocJob();

        // Reset flags and variables
        deleteByQueryCalled = false;
        deleteIndex = null;
        deleteQuery = null;

     * Deletes an index from the search engine.
     *
     * @param indexName the name of the index to delete
     * @return true if the index was deleted successfully, false otherwise
     */
    public boolean deleteIndex(final String indexName) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        try {
            final AcknowledgedResponse response =