@Override
            public boolean isChangedClusterState(int status) {
                // State has changed
                return true;
            }

            @Override
            public String getHostname() {
                return "test-hostname";
            }
        };

        FessConfig fessConfig = createTestFessConfig();

        // Register components

     *
     * @return the hostname associated with the address
     */
    @Override
    public String getHostName() {
        if (this.addr instanceof NbtAddress) {
            return ((NbtAddress) this.addr).getHostName();
        }
        return ((InetAddress) this.addr).getHostName();
    }

    /**
     * Return the IP address as text such as "192.168.1.15".
     *
     * @return the ip address

        // host/port/realm: only set if not blank (null means "any" - AuthScope.ANY equivalent)
        if (StringUtil.isNotBlank(getHostname())) {
            config.setHost(getHostname());
        }
        if (getPort() != null) {
            config.setPort(getPort());
        }
        if (StringUtil.isNotBlank(getAuthRealm())) {
            config.setRealm(getAuthRealm());

        // Test getHostName when hostname is known
        mockName = new Name(mockConfig, "KNOWNHOST", 0x20, null);
        NbtAddress nbtAddress = new NbtAddress(mockName, testAddressInt, false, NbtAddress.H_NODE);
        assertEquals("KNOWNHOST", nbtAddress.getHostName());
    }

    @Test
    void testGetHostName_UnknownHost() {
        // Test getHostName when hostname is unknown, should return IP address

     *
     * @return the hostname of this address
     */

    public String getHostName() {
        if (addr instanceof NbtAddress) {
            return ((NbtAddress) addr).getHostName();
        }
        return ((InetAddress) addr).getHostName();
    }

    /**
     * Return the IP address as text such as "192.168.1.15".
     *

    }

    @Test
    @DisplayName("getHostName should return valid hostname or address")
    void testGetHostNameContract() {
        // Given
        String expectedHostName = "server.example.com";
        when(mockAddress.getHostName()).thenReturn(expectedHostName);

        // When
        String hostName = mockAddress.getHostName();

        // Then

    <T extends Address> T unwrap(Class<T> type);

    /**
     * Gets the host name of this address.
     *
     * @return the resolved host name, or the host address if it could not be resolved
     */
    String getHostName();

    /**
     * Return the IP address as text such as "192.168.1.15".
     *
     * @return the ip address
     */
    String getHostAddress();

    /**
     * Converts this address to an InetAddress.

            when(mockInetAddress.getHostName()).thenReturn("inet-host");
            UniAddress uniAddress = new UniAddress(mockInetAddress);
            assertEquals("inet-host", uniAddress.getHostName());
        }

        @Test
        void shouldReturnNbtAddressHostnameWhenWrappedIsNbtAddress() {
            when(mockNbtAddress.getHostName()).thenReturn("nbt-host");

            return;
        }

        try {
            final SearchEngineClient client = ComponentUtil.getSearchEngineClient();
            final String hostname = ComponentUtil.getSystemHelper().getHostname();
            final String indexName = resolveIndexName();

            ensureIndexExists(client, indexName);

            for (int i = 0; i < events.size(); i += BATCH_SIZE) {

                    } else {
                        postcard.addTo(fessConfig.getMailFromAddress());
                        postcard.dryrun();
                    }
                    postcard.setHostname(systemHelper.getHostname());
                    postcard.setLevel(level);
                    postcard.setCount(String.valueOf(levelEvents.size()));