# Sets up resolution with IPv6 support if the address is an ip

    # @since 2.0.0

    class IPv6

      # The regular expression to use to match an IPv6 ip address.

      # Parse an IPv6 address into its host and port.

      # Initialize the IPv6 resolver.

      # @example Initialize the resolver.

      #   IPv6.new("::1", 28011, 'localhost')

      #

      # @example Get an IPv6 socket.

require 'mongo/address/ipv4'

require 'mongo/address/ipv6'

      ::Socket::PF_UNIX => Unix,

      ::Socket::AF_INET6 => IPv6,

    #

    # @example Initialize the address with an IPV6 address and port.

    #

    # @example Initialize the address with an IPV6 address and no port.

        when Unix::MATCH then Unix.parse(address)

        when IPv6::MATCH then IPv6.parse(address)

    context 'when providing an ipv6 host' do

    context 'when providing a DNS entry that resolves to both IPv6 and IPv4' do

      it "attempts to use IPv6 and fallbacks to IPv4" do

describe Mongo::Address::IPv6 do

      it 'sets the family as ipv6' do

      it 'sets the family a ipv6' do

    context 'numerical ipv6 server' do

          'ipv4' => Mongo::Address::IPv4,

          'ipv6' => Mongo::Address::IPv6,