public void setUp() throws Exception {
        ip = InetAddress.getByAddress(new byte[]{1, 2, 3, 4});
        noHostnameNode = new MockMemcachedNode(new InetSocketAddress(ip, 11211));
    }
Test the KetamaNodeKeyFormatter with the currently supported 2 formats used by
either spymemcached and libmemcached
src/test/java/net/spy/memcached/KetamaNodeKeyFormatterTest.java