*/
class AndroidAsyncDnsTest {
  @JvmField @Rule
  val serverRule = MockWebServerRule()
  private lateinit var client: OkHttpClient

  private val localhost: HandshakeCertificates by lazy {
    // Generate a self-signed cert for the server to serve and the client to trust.
    val heldCertificate =
      HeldCertificate.Builder()
        .addSubjectAlternativeName("localhost")
        .build()
    return@lazy HandshakeCertificates.Builder()

    We don't expect this to be a problem in practice!

 *  **OkHttp has an experimental new API for tracking metrics.** The new
    `EventListener` API is designed to help developers monitor HTTP requests'
    size and duration. This feature is an unstable preview: the API is subject
    to change, and the implementation is incomplete. This is a big new API we
    are eager for feedback.

      val toVerify = result[result.size - 1] as X509Certificate

      // If this cert has been signed by a trusted cert, use that. Add the trusted certificate to
      // the end of the chain unless it's already present. (That would happen if the first
      // certificate in the chain is itself a self-signed and trusted CA certificate.)
      val trustedCert = trustRootIndex.findByIssuerAndSignature(toVerify)

            },
      )
    val randalcatSet = readCodePointSet(base / "rfc3454.D.1.txt")
    val lcatSet = readCodePointSet(base / "rfc3454.D.2.txt")
    return Stringprep(
      unassigned = unassigned,
      mapping = mapping,
      prohibitSet = prohibitSet,
      randalcatSet = randalcatSet,
      lcatSet = lcatSet,
    )
  }

  /**
   * Reads a set of range lines like the following:
   *

package mockwebserver3

import java.io.IOException
import okhttp3.ExperimentalOkHttpApi
import okio.BufferedSink

/**
 * The body of a [MockResponse].
 *
 * Unlike [okhttp3.ResponseBody], this interface is designed to be implemented by writers and not
 * called by readers.
 */
@ExperimentalOkHttpApi
interface MockResponseBody {
  /** The length of this response in bytes, or -1 if unknown. */
  val contentLength: Long

  @Test fun readRfc3491FromResources() {
    val reader = StringprepTablesReader(FileSystem.RESOURCES)
    val nameprep = reader.readNameprep("/okhttp3/internal/idn".toPath())
    assertThat((nameprep.unassigned as RangeListCodePointSet).ranges).hasSize(396)
    assertThat((nameprep.mapping as MappingListCodePointMapping).mappings).hasSize(1398)
    assertThat((nameprep.prohibitSet as RangeListCodePointSet).ranges).hasSize(78)

/**
 * Computes the effective certificate chain from the raw array returned by Java's built in TLS APIs.
 * Cleaning a chain returns a list of certificates where the first element is `chain[0]`, each
 * certificate is signed by the certificate that follows, and the last certificate is a trusted CA
 * certificate.
 *
 * Use of the chain cleaner is necessary to omit unexpected certificates that aren't relevant to

     * environments and only to carry test data.
     *
     * The server’s TLS certificate **does not need to be signed** by a trusted certificate
     * authority. Instead, it will trust any well-formed certificate, even if it is self-signed.
     * This is necessary for testing against localhost or in development environments where a
     * certificate authority is not possible.
     *

  internal val flowControlListener: FlowControlListener = builder.flowControlListener

  /** Settings we communicate to the peer. */
  val okHttpSettings =
    Settings().apply {
      // Flow control was designed more for servers, or proxies than edge clients. If we are a client,
      // set the flow control window to 16MiB.  This avoids thrashing window updates every 64KiB, yet
      // small enough to avoid blowing up the heap.

centers. OkHttp supports modern TLS features (TLS 1.3, ALPN, certificate pinning). It can be
configured to fall back for broad connectivity.

Using OkHttp is easy. Its request/response API is designed with fluent builders and immutability. It
supports both synchronous blocking calls and async calls with callbacks.


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---------