### Question:
ConnectionConfiguration { public DnsName getHost() { return host; } protected  ConnectionConfiguration(Builder<?, ?> builder); DnsName getHost(); InetAddress getHostAddress(); UInt16 getPort(); @Deprecated DomainBareJid getServiceName(); DomainBareJid getXMPPServiceDomain(); DnsName getXmppServiceDomainAsDnsNameIfPossible(); SecurityMode getSecurityMode(); DnssecMode getDnssecMode(); String[] getEnabledSSLProtocols(); String[] getEnabledSSLCiphers(); HostnameVerifier getHostnameVerifier(); SmackDebuggerFactory getDebuggerFactory(); CallbackHandler getCallbackHandler(); SocketFactory getSocketFactory(); ProxyInfo getProxyInfo(); CharSequence getUsername(); String getPassword(); Resourcepart getResource(); Locale getLanguage(); String getXmlLang(); EntityBareJid getAuthzid(); boolean isSendPresence(); boolean isCompressionEnabled(); boolean isEnabledSaslMechanism(String saslMechanism); Set<String> getEnabledSaslMechanisms();  }### Answer:
@Test public void setFqdn() { DummyConnectionConfiguration.Builder builder = newUnitTestBuilder(); final String fqdn = "foo.example.org"; builder.setHost(fqdn); DummyConnectionConfiguration connectionConfiguration = builder.build(); assertEquals(fqdn, connectionConfiguration.getHost().toString()); }