* ```
   *
   * @param domain A canonicalized domain. An International Domain Name (IDN) should be punycode
   *     encoded.
   */
  fun getEffectiveTldPlusOne(domain: String): String? {
    // We use UTF-8 in the list so we need to convert to Unicode.
    val unicodeDomain = IDN.toUnicode(domain)
    val domainLabels = splitDomain(unicodeDomain)

    val rule = findMatchingRule(domainLabels)

  public void testEquality() {
    new EqualsTester()
        .addEqualityGroup(idn("google.com"), idn("google.com"), idn("GOOGLE.COM"))
        .addEqualityGroup(idn("www.google.com"))
        .addEqualityGroup(UNICODE_EXAMPLE)
        .addEqualityGroup(PUNYCODE_EXAMPLE)
        .testEquals();
  }

  private static InternetDomainName idn(String domain) {
    return InternetDomainName.from(domain);
  }

# no rules should be needed

-whyareyoukeeping class okhttp3.internal.idn.IdnaMappingTable {
  *;

  filteringCharset = Charsets.UTF_8.toString()

  expand(
    // Build & use okhttp3/internal/-InternalVersion.kt
    "projectVersion" to project.version,
  )
}

// Build & use okhttp3/internal/idn/IdnaMappingTableInstance.kt
val generateIdnaMappingTableConfiguration: Configuration by configurations.creating
dependencies {
  generateIdnaMappingTableConfiguration(projects.okhttpIdnaMappingTable)
}

    to use `Lock` and `Condition` instead of `synchronized` for best resource utilization.

 *  New: Switch our Internationalized Domain Name (IDN) implementation to [UTS #46 Nontransitional
    Processing][uts46]. With this fix, the `ß` code point no longer maps to `ss`. OkHttp now embeds
    its own IDN mapping table in the library.

 *  New: Prefer the client's configured precedence order for TLS cipher suites. (OkHttp used to

  }

  @Test
  fun hostnameMappingLastMappedCodePoint() {
    assertThat(parse("http://\uD87E\uDE1D").host).isEqualTo("xn--pu5l")
  }

  // The java.net.IDN implementation doesn't ignore characters that it should.
  @Ignore
  @Test
  fun hostnameMappingLastIgnoredCodePoint() {
    assertThat(parse("http://ab\uDB40\uDDEFcd").host).isEqualTo("abcd")
  }

  @Test