assertEquals(CrawlerStatus.DONE, crawler.crawlerContext.getStatus());
            dataService.delete(sessionId);
        } finally {
            server.stop();
        }
    }

    public void test_close() throws Exception {
        final Crawler testCrawler = container.getComponent("crawler");

        // close should not throw exception
        testCrawler.close();
    }

        chain.add((text, field, langs) -> text.replace(" ", "_"));

        String result = chain.normalize("  TEST CASE  ", "field");

        assertEquals("test_case", result);
    }

    @Test
    public void test_nullInput() throws Exception {
        NormalizerChain chain = new NormalizerChain();
        chain.add(new FullWidthToHalfWidthAlphabetNormalizer());