"01234567890123456789012345678901234567890123456789.01234567890123456789012345678901234567890123456789.01234567890123456789012345678901234567890123456789.01234567890123456789012345678901234567890123456789.0123456789012345678901234567890123456789012345678.ß",
      // OkHttp does not reject invalid Punycode.
      "xn--a",
      "xn--a.ß",
      "xn--a.xn--zca",
      "xn--a-yoc",

    checkPublicSuffix("xn--85x722f.com.cn", "xn--85x722f.com.cn")
    checkPublicSuffix("xn--85x722f.xn--55qx5d.cn", "xn--85x722f.xn--55qx5d.cn")
    checkPublicSuffix("www.xn--85x722f.xn--55qx5d.cn", "xn--85x722f.xn--55qx5d.cn")
    checkPublicSuffix("shishi.xn--55qx5d.cn", "shishi.xn--55qx5d.cn")
    checkPublicSuffix("xn--55qx5d.cn", null)
    checkPublicSuffix("xn--85x722f.xn--fiqs8s", "xn--85x722f.xn--fiqs8s")

    "output": null
  },
  {
    "input": "xn--a.ß",
    "output": null
  },
  {
    "input": "xn--ls8h=",
    "output": null
  },
  {
    "comment": "Invalid Punycode (contains non-ASCII character)",
    "input": "xn--tešla",
    "output": null
  },
  {
    "comment": "Valid Punycode",
    "input": "xn--zca.xn--zca",
    "output": "xn--zca.xn--zca"
  },
  {
    "comment": "Mixed",

il
ac.il
co.il
gov.il
idf.il
k12.il
muni.il
net.il
org.il
// xn--4dbrk0ce ("Israel", Hebrew) : IL
ישראל
// xn--4dbgdty6c.xn--4dbrk0ce.
אקדמיה.ישראל
// xn--5dbhl8d.xn--4dbrk0ce.
ישוב.ישראל
// xn--8dbq2a.xn--4dbrk0ce.
צהל.ישראל
// xn--hebda8b.xn--4dbrk0ce.
ממשל.ישראל

// im : https://www.nic.im/
// Submitted by registry <******@****.***>
im

    testEncodeDecode(
      unicode = "☃.net",
      punycode = "xn--n3h.net",
    )
    testEncodeDecode(
      unicode = "ålgård.no",
      punycode = "xn--lgrd-poac.no",
    )
    testEncodeDecode(
      unicode = "個人.香港",
      punycode = "xn--gmqw5a.xn--j6w193g",
    )
    testEncodeDecode(
      unicode = "упр.срб",
      punycode = "xn--o1ach.xn--90a3ac",
    )
  }

    assertThat(parse(unicode, "a=b; domain=長崎.jp")).isNull()
    val punycode = "https://xn--ue5a.xn--ue5a.xn--8ltr62k.jp".toHttpUrl()
    assertThat(parse(punycode, "a=b; domain=xn--ue5a.xn--8ltr62k.jp")).isNotNull()
    assertThat(parse(punycode, "a=b; domain=xn--8ltr62k.jp")).isNull()
  }

  @Test fun hostOnly() {
    assertThat(parse(url, "a=b")!!.hostOnly).isTrue()
    assertThat(

      .isEqualTo("google.co.uk")
    assertThat("https://栃.栃木.jp".toHttpUrl().topPrivateDomain())
      .isEqualTo("xn--ewv.xn--4pvxs.jp")
    assertThat("https://xn--ewv.xn--4pvxs.jp".toHttpUrl().topPrivateDomain())
      .isEqualTo("xn--ewv.xn--4pvxs.jp")
    assertThat("https://co.uk".toHttpUrl().topPrivateDomain()).isNull()
    assertThat("https://square".toHttpUrl().topPrivateDomain()).isNull()

 *
 * [RFC 3492]: https://datatracker.ietf.org/doc/html/rfc3492
 * [RFC 5890]: https://datatracker.ietf.org/doc/html/rfc5890
 * [UTS #46]: https://www.unicode.org/reports/tr46/
 */
object Punycode {
  val PREFIX_STRING = "xn--"
  val PREFIX = PREFIX_STRING.encodeUtf8()

  private const val BASE = 36
  private const val TMIN = 1
  private const val TMAX = 26
  private const val SKEW = 38
  private const val DAMP = 700

  private static final InternetDomainName UNICODE_EXAMPLE =
      InternetDomainName.from("j\u00f8rpeland.no");
  private static final InternetDomainName PUNYCODE_EXAMPLE =
      InternetDomainName.from("xn--jrpeland-54a.no");

  /** The Greek letter delta, used in unicode testing. */
  private static final String DELTA = "\u0394";

    // Hostnames
    assertThat("WwW.GoOgLe.cOm".toCanonicalHost()).isEqualTo("www.google.com")
    assertThat("localhost".toCanonicalHost()).isEqualTo("localhost")
    assertThat("☃.net".toCanonicalHost()).isEqualTo("xn--n3h.net")

    // IPv4 Compatible or Mapped addresses
    assertThat("::192.168.0.1".toCanonicalHost()).isEqualTo("::c0a8:1")
    assertThat("::FFFF:192.168.0.1".toCanonicalHost()).isEqualTo("192.168.0.1")