@Implements(DnsResolver::class)
class ShadowDnsResolver {
  var responder: (Request) -> Unit = {
    it.callback.onAnswer(listOf(), 0)
  }

  data class Request(
    val network: Network?,
    val domain: String,
    val nsType: Int,
    val flags: Int,
    val callback: DnsResolver.Callback<List<InetAddress>>,
  )

  @Implementation
  fun query(
    network: Network?,
    domain: String,
    nsType: Int,

import java.io.IOException
import okhttp3.Authenticator
import okhttp3.Request
import okhttp3.Response
import okhttp3.Route

class RecordingOkAuthenticator(
  val credential: String?,
  val scheme: String?,
) : Authenticator {
  val responses = mutableListOf<Response>()
  val routes = mutableListOf<Route>()

  fun onlyResponse() = responses.single()

  fun onlyRoute() = routes.single()

  @Throws(IOException::class)

fun buildIdnaMappingTableData(table: SimpleIdnaMappingTable): IdnaMappingTableData {
  val simplified = mergeAdjacentRanges(table.mappings)
  val withoutSectionSpans = withoutSectionSpans(simplified)
  val sections = sections(withoutSectionSpans)

  val rangesBuffer = Buffer()
  val mappingsBuffer = StringBuilder()
  val sectionIndexBuffer = Buffer()

  var previousMappedRanges: List<MappedRange>? = null

class HeldCertificateTest {
  @RegisterExtension
  var platform = PlatformRule()

  @Test
  fun defaultCertificate() {
    val now = System.currentTimeMillis()
    val heldCertificate = HeldCertificate.Builder().build()
    val certificate = heldCertificate.certificate
    assertThat(certificate.getSubjectX500Principal().name, "self-signed")
      .isEqualTo(certificate.getIssuerX500Principal().name)

```

### Usage

```
  val appCache = Cache(File("cacheDir", "okhttpcache"), 10 * 1024 * 1024)
  val bootstrapClient = OkHttpClient.Builder().cache(appCache).build()

  val dns = DnsOverHttps.Builder().client(bootstrapClient)
    .url("https://dns.google/dns-query".toHttpUrl())
    .bootstrapDnsHosts(InetAddress.getByName("8.8.4.4"), InetAddress.getByName("8.8.8.8"))
    .build()

  fun roundTripForRequestAndResponse() {
    val s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
    for (i in s.indices) {
      assertRoundTrip(s.substring(0, i).encodeUtf8())
    }
    val random = Random(123456789L)
    val buf = ByteArray(4096)
    random.nextBytes(buf)
    assertRoundTrip(buf.toByteString())
  }

  private fun assertRoundTrip(data: ByteString) {
    val encodeBuffer = Buffer()

  }

  fun assertJobs(vararg expectedUrls: String) {
    val actualUrls = calls.map { it.request.url.toString() }
    assertThat(actualUrls).containsExactly(*expectedUrls)
  }

  fun finishJob(url: String) {
    val i = calls.iterator()
    while (i.hasNext()) {
      val call = i.next()
      if (call.request.url.toString() == url) {
        i.remove()
        dispatcherTest.dispatcher.finishedAccessor(call)

  val showHttp2Frames: Boolean by option("--frames").help("Log HTTP/2 frames to STDERR").flag()

  val referer: String? by option("-e", "--referer").help("Referer URL")

  val verbose: Boolean by option("-v", "--verbose").help("Makes $NAME verbose during the operation").flag()

  val sslDebug: Boolean by option("--sslDebug").help("Output SSL Debug").flag()

    }
  }

  override fun toString(): String = javaClass.simpleName

  companion object {
    @Volatile private var platform = findPlatform()

    const val INFO = 4
    const val WARN = 5

    private val logger = Logger.getLogger(OkHttpClient::class.java.name)

    @JvmStatic
    fun get(): Platform = platform

    fun resetForTests(platform: Platform = findPlatform()) {

class HeadersKotlinTest {
  @Test fun getOperator() {
    val headers = headersOf("a", "b", "c", "d")
    assertThat(headers["a"]).isEqualTo("b")
    assertThat(headers["c"]).isEqualTo("d")
    assertThat(headers["e"]).isNull()
  }

  @Test fun iteratorOperator() {
    val headers = headersOf("a", "b", "c", "d")

    val pairs = mutableListOf<Pair<String, String>>()
    for ((name, value) in headers) {