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 "";
}

}`