final String sessionId = "session1";

        assertEquals(1, indexingHelper.deleteBySessionId(sessionId));
        assertEquals("fess.update", resultMap.get("index"));
        assertEquals("segment", resultMap.get("field"));
        assertEquals(sessionId, resultMap.get("value"));
    }

    public void test_deleteByConfigId() {
        final Map<String, String> resultMap = new HashMap<>();