}
            if (updateIndices.size() != 1) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Unexpected update indices num: {}", updateIndices.size());
                }
                throw new SuggesterException("Unexpected update indices num:" + updateIndices.size());
            }
            final String updateIndex = updateIndices.get(0);

            return "Crawler is initializing";
        case RUNNING:
            return "Crawler is running";
        case DONE:
            return "Crawler has completed";
        default:
            fail("Unexpected status: " + status);
            return null;
        }
    }

    /**
     * Test state transitions (typical workflow)
     */
    public void test_stateTransitions() {