* the request completes normally or when it fails due to an exception, in which case [e] should
   * be non-null.
   *
   * If the exchange was canceled or timed out, this will wrap [e] in an exception that provides
   * that additional context. Otherwise [e] is returned as-is.
   */
  internal fun <E : IOException?> messageDone(
    exchange: Exchange,
    requestDone: Boolean,

          response: Response?,
        ) {
          t.printStackTrace(System.out)
          latch.countDown()
        }
      },
    )

    check(latch.await(30, TimeUnit.SECONDS)) { "Timed out waiting for test $number to finish." }
    val endNanos = System.nanoTime()
    val tookMs = TimeUnit.NANOSECONDS.toMillis(endNanos - startNanos.get())
    println("Took ${tookMs}ms")
  }

import java.io.EOFException
import java.net.InetAddress
import java.net.UnknownHostException
import okio.Buffer
import okio.ByteString
import okio.utf8Size

/**
 * Trivial Dns Encoder/Decoder, basically ripped from Netty full implementation.
 */
internal object DnsRecordCodec {
  private const val SERVFAIL = 2
  private const val NXDOMAIN = 3
  const val TYPE_A = 0x0001
  const val TYPE_AAAA = 0x001c

  fun takeAll(): List<String> {
    val list = mutableListOf<String>()
    logs.drainTo(list)
    return list
  }

  fun take(): String {
    return logs.poll(10, TimeUnit.SECONDS)
      ?: throw AssertionError("Timed out waiting for log message.")
  }

1FA87..1FA88  ; valid                  ;      ; NV8    # 15.0 MARACAS..FLUTE
1FA89..1FA8F  ; disallowed                             # NA   <reserved-1FA89>..<reserved-1FA8F>
1FA90..1FA95  ; valid                  ;      ; NV8    # 12.0 RINGED PLANET..BANJO
1FA96..1FAA8  ; valid                  ;      ; NV8    # 13.0 MILITARY HELMET..ROCK
1FAA9..1FAAC  ; valid                  ;      ; NV8    # 14.0 MIRROR BALL..HAMSA

      }
      val nowMillis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime())
      if (nowMillis >= timeoutMillis) break
      (this as Object).wait(timeoutMillis - nowMillis)
    }

    throw AssertionError("Timed out waiting for response to $url")
  }

  companion object {
    val TIMEOUT_MILLIS = TimeUnit.SECONDS.toMillis(10)
  }

    } else {
      events.add(Failure(t, response))
    }
  }

  private fun nextEvent(): Any {
    return events.poll(10, TimeUnit.SECONDS)
      ?: throw AssertionError("Timed out waiting for event.")
  }

  fun assertTextMessage(payload: String?) {
    assertThat(nextEvent()).isEqualTo(Message(string = payload))
  }

  fun assertBinaryMessage(payload: ByteString?) {

    val startNanos = System.nanoTime()
    bodySource.use {
      assertFailsWith<IOException> {
        bodySource.readByte()
      }.also { expected ->
        // Timed out as expected.
        val elapsedNanos = System.nanoTime() - startNanos
        val elapsedMillis = TimeUnit.NANOSECONDS.toMillis(elapsedNanos)
        assertThat(elapsedMillis).isLessThan(500)
      }
    }
  }

    if (cancel) {
      cancel = false
      eventSource.cancel()
    }
  }

  private fun nextEvent(): Any {
    return events.poll(10, TimeUnit.SECONDS)
      ?: throw AssertionError("Timed out waiting for event.")
  }

  fun assertExhausted() {
    assertThat(events).isEmpty()
  }

  fun assertEvent(
    id: String?,
    type: String?,
    data: String,
  ) {

    val readTimeout = soTimeout
    try {
      soTimeout = 1
      !source.exhausted()
    } finally {
      soTimeout = readTimeout
    }
  } catch (_: SocketTimeoutException) {
    true // Read timed out; socket is good.
  } catch (_: IOException) {
    false // Couldn't read; socket is closed.
  }
}

internal inline fun threadName(
  name: String,
  block: () -> Unit,
) {