}

    static <Q> Number percentChange(Amount<Q> current, Amount<Q> previous) {
        if (previous == Amount.valueOf(0, previous.getUnits())) {
            return 100 as Integer
        }
        BigDecimal result = (current - previous) / previous * 100
        return result.setScale(2, RoundingMode.HALF_UP)
    }

        average = total.div(size());
        this.min = min;
        this.max = max;

        BigDecimal sumSquares = BigDecimal.ZERO;
        Units<Q> baseUnits = average.getUnits().getBaseUnits();
        BigDecimal averageValue = average.toUnits(baseUnits).getValue();
        for (Amount<Q> amount : this) {
            BigDecimal diff = amount.toUnits(baseUnits).getValue();

    public String toString() {
        if (cachedToString == null) {
            cachedToString = value + " " + units.format(value);
        }
        return cachedToString;
    }

    public Units<Q> getUnits() {
        return units;
    }

    public BigDecimal getValue() {
        return value;
    }

    /**
     * Returns a human consumable string representation of this amount.
     */

                .execute().actionGet().getHits().getTotalHits().value > 0);

        urlQueueService.delete("sessionId");
        assertFalse(fesenClient.prepareSearch("fess_crawler.queue").setQuery(QueryBuilders.termQuery("sessionId", "sessionId")).setSize(0)
                .execute().actionGet().getHits().getTotalHits().value > 0);

    }

    public void test_insert_update_delete_multiTx() {

        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = response.getHits();
                if (searchHits.getHits().length == 0) {
                    break;
                }

                for (final SearchHit searchHit : searchHits) {

                .setRescoreQueryWeight(1);
    }

    protected PopularWordsResponse createResponse(final SearchResponse searchResponse) {
        final SearchHit[] hits = searchResponse.getHits().getHits();
        final List<String> words = new ArrayList<>();
        final List<SuggestItem> items = new ArrayList<>();

        final String index;
        if (hits.length > 0) {

                .setFetchSource(false).setSize(fessConfig.getPageScoreBoosterMaxFetchSizeAsInteger()).execute().actionGet(requestTimeout);
        return Arrays.stream(response.getHits().getHits()).map(SearchHit::getId).toArray(n -> new String[n]);
    };

    protected Function<Map<String, Object>, Long> requestHandler = params -> {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

                        SuggestUtil.deleteScrollContext(client, scrollId);
                    }
                }
                scrollId = response.getScrollId();
                final SearchHit[] hits = response.getHits().getHits();
                if (scrollId == null || hits.length == 0) {
                    SuggestUtil.deleteScrollContext(client, scrollId);
                    isFinished.set(true);
                }