iam beginner in android testing with Mockito : i want to test this method using mockito and unit testing

`public class CurrentIP {


    public static String getIPAddress() {
        try {
            List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
            for (NetworkInterface intf : interfaces) {
                List<InetAddress> addrs = Collections.list(intf.getInetAddresses());
                for (InetAddress addr : addrs) {
                    if (!addr.isLoopbackAddress()) {
                        String sAddr = addr.getHostAddress();
                        boolean isIPv4 = sAddr.indexOf(':') < 0;
                        if (isIPv4)
                            return sAddr;
                    }
                }
            }
        } catch (Exception ignored) {
        } // for now eat exceptions
        return "";
    }
}`