public void test_destroy_notFinished() {
        final List<Crawler> crawlerList = new ArrayList<>();
        final TestCrawler crawler = new TestCrawler();
        crawlerList.add(crawler);
        indexUpdater.setCrawlerList(crawlerList);
        indexUpdater.finishCrawling = false;

        indexUpdater.destroy();

        assertTrue(crawler.stopCalled);
    }

    // Test destroy when crawling is finished

    }

    /**
     * Sets the list of crawler instances that this updater will manage.
     *
     * @param crawlerList the list of crawlers to set
     */
    public void setCrawlerList(final List<Crawler> crawlerList) {
        this.crawlerList = crawlerList;
    }