assertFailsWith<IllegalArgumentException> {
      clientWriter.writeClose(98724976, "Hello".encodeUtf8())
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Code must be in range [1000,5000): 98724976")
    }
  }

  @Test fun closeReservedThrows() {
    assertFailsWith<IllegalArgumentException> {
      clientWriter.writeClose(1005, "Hello".encodeUtf8())
    }.also { expected ->

      "Invalid URL host: \"[0000:0000:0000:0000:0000:0000:0000:0001:]\"",
    )
    assertInvalid(
      "http://[0000:0000:0000:0000:0000:0000:0000:0001::]",
      "Invalid URL host: \"[0000:0000:0000:0000:0000:0000:0000:0001::]\"",
    )
    assertInvalid(
      "http://[0000:0000:0000:0000:0000:0000:0000:0001:::]",
      "Invalid URL host: \"[0000:0000:0000:0000:0000:0000:0000:0001:::]\"",

      .isEqualTo(date("1950-01-01T00:00:00.000+0000").time)
    assertThat(Adapters.parseUtcTime("500101010000Z"))
      .isEqualTo(date("1950-01-01T01:00:00.000+0000").time)

    assertThat(Adapters.parseUtcTime("491231225959Z"))
      .isEqualTo(date("2049-12-31T22:59:59.000+0000").time)
    assertThat(Adapters.parseUtcTime("491231235959Z"))
      .isEqualTo(date("2049-12-31T23:59:59.000+0000").time)
  }

  return when {
    isMappedIpv4Address(address) -> address.sliceArray(12 until 16)
    else -> address
  }
}

/** Returns true for IPv6 addresses like `0000:0000:0000:0000:0000:ffff:XXXX:XXXX`. */
private fun isMappedIpv4Address(address: ByteArray): Boolean {
  if (address.size != 16) return false

  for (i in 0 until 10) {
    if (address[i] != 0.toByte()) return false
  }

    connectionListener: ConnectionListener = ConnectionListener.NONE,
    readTimeoutMillis: Int = 10_000,
    writeTimeoutMillis: Int = 10_000,
    socketConnectTimeoutMillis: Int = 10_000,
    socketReadTimeoutMillis: Int = 10_000,
    pingIntervalMillis: Int = 10_000,
    retryOnConnectionFailure: Boolean = true,
    fastFallback: Boolean = true,
    routeDatabase: RouteDatabase = RouteDatabase(),

  /**
   * It's invalid to have a label longer than 63 characters. If that's requested, the encoder may
   * overflow and return null.
   */
  @Test fun overflowEncodingOversizedLabel() {
    val a1000 = "a".repeat(1000)
    val a1000MaxCodePoint = a1000 + "\udbff\udfff"
    testEncodeDecode(
      a1000MaxCodePoint,
      "xn--$a1000-nc89312g",
    )
    assertNull(
      Punycode.encode(a1000MaxCodePoint.repeat(2)),

    server.enqueue(
      MockResponse(body = "unused"),
    ) // to keep the server alive
    val response = getResponse(newRequest("/"))
    val source = response.body.source()
    source.timeout().timeout(1000, TimeUnit.MILLISECONDS)
    assertThat(source.readByte()).isEqualTo('A'.code.toByte())
    assertThat(source.readByte()).isEqualTo('B'.code.toByte())
    assertThat(source.readByte()).isEqualTo('C'.code.toByte())

      assertThat(expected.message)
        .isEqualTo("Code must be in range [1000,5000): 1")
    }
    data.write("88021388".decodeHex()) // Close with code 5000
    assertFailsWith<ProtocolException> {
      clientReader.processNextFrame()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Code must be in range [1000,5000): 5000")
    }
  }

  @Test fun closeReservedSetThrows() {

    server.webSocket!!.close(1000, "Hello!")
    client.processNextFrame()
    client.listener.assertClosing(1000, "Hello!")
    assertThat(client.webSocket!!.close(1000, "Bye!")).isTrue()
    client.webSocket!!.finishReader()
    taskFaker.runTasks()
    client.listener.assertClosed(1000, "Hello!")
    server.processNextFrame()
    server.listener.assertClosing(1000, "Bye!")
    server.webSocket!!.finishReader()

      webSocket.close(1000, reason)
    }.also { expected ->
      assertThat(expected.message).isEqualTo("reason.size() > 123: $reason")
    }
    webSocket.close(1000, null)
    serverListener.assertClosing(1000, "")
    server.close(1000, null)
    clientListener.assertClosing(1000, "")
    clientListener.assertClosed(1000, "")
    serverListener.assertClosed(1000, "")
  }

  @Test