default:
            fail("Unexpected status: " + status);
            return null;
        }
    }

    /**
     * Test state transitions (typical workflow)
     */
    public void test_stateTransitions() {
        // Simulate typical crawler lifecycle
        CrawlerStatus currentStatus = CrawlerStatus.INITIALIZING;
        assertEquals(CrawlerStatus.INITIALIZING, currentStatus);

        Thread.sleep(50);
        // Should be expired with very short timeout (shorter than sleep time)
        assertTrue(registration.isExpired(10));
    }

    @Test
    void testStateTransitions() {
        assertEquals(WitnessRegistrationState.REGISTERING, registration.getState());

        registration.setState(WitnessRegistrationState.REGISTERED);

        assertFalse(channelInfo.isPrimary());
        assertEquals(0, channelInfo.getBytesSent());
        assertEquals(0, channelInfo.getBytesReceived());
    }

    @Test
    void testStateTransitions() {
        assertEquals(ChannelState.DISCONNECTED, channelInfo.getState());
        assertFalse(channelInfo.isHealthy());

        channelInfo.setState(ChannelState.ESTABLISHED);