@ssh_authorized_key{"rip":
        ensure  => present,
        key     => "foo==",
        type    => "ssh-dss",
        name    => "rip@indulgence",
        user    => rip,
}

realize(Ssh_authorized_key["rip"])

% puppet test.pp
notice: //Ssh_authorized_key[rip]/ensure: created

% puppet test.pp
notice: //Ssh_authorized_key[rip]/target: target changed '/home/rip/.ssh/authorized_keys' to '/home/rip/.ssh/authorized_keys'