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

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

    for (double d : FRACTIONAL_DOUBLE_CANDIDATES) {
      assertFalse(DoubleMath.isMathematicalInteger(d));
    }
  }

  @GwtIncompatible // DoubleMath.isMathematicalInteger
  public void testIsMathematicalIntegerNotFinite() {
    for (double d : Arrays.asList(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY, Double.NaN)) {
      assertFalse(DoubleMath.isMathematicalInteger(d));
    }
  }

        // Test operations on empty service
        assertEquals(0, mockService.getRegistrationCount());
        assertFalse(mockService.hasRegistration("non-existent"));
        assertFalse(mockService.unregisterWitness("non-existent"));
        assertFalse(mockService.processHeartbeat("non-existent", 1));

        // Test registration with null/empty values
        String regId1 = mockService.registerWitness(null, "192.168.1.100", 1);

        OrArtifactFilter filter2 = new OrArtifactFilter(Arrays.asList(newSubFilter()));

        assertFalse(filter1.equals(null));
        assertTrue(filter1.equals(filter1));
        assertEquals(filter1.hashCode(), filter1.hashCode());

        assertFalse(filter1.equals(filter2));
        assertFalse(filter2.equals(filter1));
    }

        assertNull(serverData.oemDomainName);
        assertEquals(0, serverData.securityMode);
        assertEquals(0, serverData.security);
        assertFalse(serverData.encryptedPasswords);
        assertFalse(serverData.signaturesEnabled);
        assertFalse(serverData.signaturesRequired);
        assertEquals(0, serverData.maxNumberVcs);
        assertEquals(0, serverData.maxRawSize);

        assertTrue(capabilities.contains(RdmaCapability.RDMA_SEND_RECEIVE), "Should support send/receive");
        assertFalse(capabilities.contains(RdmaCapability.RDMA_READ), "Should not support RDMA read");
        assertFalse(capabilities.contains(RdmaCapability.RDMA_WRITE), "Should not support RDMA write");
    }

    @Test
    public void testCreateConnection() throws Exception {

        assertTrue(newIPv4.isIPv4());
        assertFalse(newIPv4.isIPv6());
        assertEquals(WitnessNotification.WitnessIPAddress.IPV4, newIPv4.getFlags());

        // Check IPv6 address
        WitnessNotification.WitnessIPAddress newIPv6 = newAddresses.get(1);
        assertEquals(ipv6, newIPv6.getAddress());
        assertFalse(newIPv6.isIPv4());
        assertTrue(newIPv6.isIPv6());

    Iterator<Subscriber> empty = registry.getSubscribers("");
    assertFalse(empty.hasNext());

    empty = registry.getSubscribers("");

    registry.register(s1);
    assertFalse(empty.hasNext());

    Iterator<Subscriber> one = registry.getSubscribers("");
    assertEquals(s1, one.next().target);
    assertFalse(one.hasNext());

    one = registry.getSubscribers("");

        // Test operations on empty list
        assertTrue(qrList.isEmpty());
        assertEquals(0, qrList.size());

        assertFalse(qrList.remove(new HashMap<>()));
        assertFalse(qrList.contains(new HashMap<>()));
        assertFalse(qrList.containsAll(Arrays.asList(new HashMap<>())));

        assertEquals(-1, qrList.indexOf(new HashMap<>()));

        assertFalse(labelTypeHelper.matchLocale(null, Locale.ENGLISH));

        // Test with different countries
        assertFalse(labelTypeHelper.matchLocale(Locale.US, Locale.UK));

        // Test with same language but different country
        Locale enUS = new Locale("en", "US");
        Locale enGB = new Locale("en", "GB");
        assertFalse(labelTypeHelper.matchLocale(enUS, enGB));