### Question:
IPv6 implements Comparable<IPv6> { public void setVipOctets(int lo) throws IPStringConversionException { this.insertInteger(lo, 96); } 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 testSetLowPartition() throws IPStringConversionException{ IPv6 control = new IPv6("ffff::"); IPv6 expected = new IPv6("ffff::7fe6:ffef"); control.setVipOctets(2145845231); assertEquals(expected,control); }