### Question:
Environment { public List<String> getMyIpAddresses() { try { return Collections.list(NetworkInterface.getNetworkInterfaces()).stream() .map(iface -> Collections.list(iface.getInetAddresses())) .flatMap(Collection::stream).map(InetAddress::getHostAddress) .collect(Collectors.toList()); } catch (SocketException e) { LOG.error("Error while determining IP addresses: ", e); return null; } } private  Environment();  Environment(String propFilePath); static String readFirstLine(File file); static String osRelease(); boolean isPi(); static Environment getInstance(); boolean runningOnRaspberryPi(); Properties getProperties(); JsonObject asJsonObject(); static void from(JsonObject configJo); List<String> getMyIpAddresses(); String getString(String key); int getInteger(String key); double getDouble(String key); static void reset(); static void from(String propFilePath); static void mock(); static String dukesHome; public String propFilePath; }### Answer:
@Test public void testGetMyIpAddresses() { List<String> ips = Environment.getInstance().getMyIpAddresses(); assertNotNull(ips); assertTrue(ips.size() > 1); }