final String docId = systemHelper.generateDocId(Collections.emptyMap());
        assertNotNull(docId);
        assertEquals(32, docId.length());
    }

    @Test
    public void test_abbreviateLongText() {
        assertEquals("", systemHelper.abbreviateLongText(""));
        assertEquals(4000, systemHelper.abbreviateLongText(Stream.generate(() -> "a").limit(4000).collect(Collectors.joining())).length());