### Question:
NetUtils { public static String getHost() { if (HOST_ADDRESS != null) { return HOST_ADDRESS; } InetAddress address = getLocalAddress(); if (address != null) { HOST_ADDRESS = address.getHostAddress(); return HOST_ADDRESS; } return LOCAL_HOST_VALUE; } private  NetUtils(); static String getHost(); static boolean isValidV4Address(InetAddress address); static boolean ignoreNetworkInterface(NetworkInterface networkInterface);  }### Answer:
@Test public void testGetLocalHost() { assertNotNull(NetUtils.getHost()); }