@Test
public void download_ipv6() {

    BgpRisDump<BgpRisEntry> dump = bgpRisDownloader.fetch(
            BgpRisDump.of("http://www.ris.ripe.net/dumps/riswhoisdump.IPv6.gz", null, Optional.empty()),
            Stream::of
    );
    assertThat(dump.getEntries()).hasValueSatisfying(entries -> assertThat(entries.size()).isGreaterThan(60_000));
}