### Question:
IPv6 implements Comparable<IPv6> { public byte[] getBytes() throws IPStringConversionException { return IpString2bytes(this.ip); } IPv6(BigInteger in);  IPv6();  IPv6(String ip);  IPv6(byte[] in); static String expand(String ipStr, int nwords); String expand(); BigInteger toBigInteger(); static IPv6 bigInteger2IPv6(BigInteger in); static byte[] IpString2bytes(String ipStr); static String bytes2IpString(byte[] in); void setIp(byte[] in); String getString(); byte[] getBytes(); void setIp(String ip); void insertInteger(int in, int startBit); void insertBigInteger(BigInteger in, int startBit, int size); void setAccountPartition(int accountId); void setVipOctets(int lo); int getVipOctets(); void setClusterPartition(IPv6Cidr clusterCidr); @Override String toString(); @Override boolean equals(Object obj); @Override int hashCode(); @Override int compareTo(IPv6 that);  }### Answer:
@Test public void getBytes() throws IPStringConversionException { IPv6 ip = new IPv6(ipv4Mixed_compressed); assertNotNull("Expected Non null bytes", ip.getBytes()); assertTrue(bytes_match(ip.getBytes(), ipv4Mixed_bytes)); }