return object : ForwardingSource(source) {
            @Throws(IOException::class)
            override fun close() {
              closed.set(true)
              super.close()
            }
          }.buffer()
        }
      }
    assertThat(body.string()).isEqualTo("hello")
    assertThat(closed.get()).isTrue()
  }

  @Test
  fun readerEmpty() {

  fun wrapInput(source: Source): Source {
    return object : ForwardingSource(source) {
      override fun read(
        sink: Buffer,
        byteCount: Long,
      ): Long {
        val result = super.read(sink, byteCount)
        if (result == -1L) return result
        inputByteCount += result
        return result
      }
    }
  }

  fun wrapOutput(source: Source): Source {

  ) {
    if (hasErrors) {
      source.skip(byteCount)
      return
    }
    try {
      super.write(source, byteCount)
    } catch (e: IOException) {
      hasErrors = true
      onException(e)
    }
  }

  override fun flush() {
    if (hasErrors) {
      return
    }
    try {
      super.flush()
    } catch (e: IOException) {
      hasErrors = true
      onException(e)
    }
  }

    if (deleteFaults.contains(fileOrDirectory)) throw IOException("boom!")
    super.deleteRecursively(fileOrDirectory, mustExist)
  }

  override fun appendingSink(
    file: Path,
    mustExist: Boolean,
  ): Sink = FaultySink(super.appendingSink(file, mustExist), file)

  override fun sink(
    file: Path,
    mustCreate: Boolean,
  ): Sink = FaultySink(super.sink(file, mustCreate), file)

      // Enable ALPN.
      val names = alpnProtocolNames(protocols)
      sslParameters.applicationProtocols = names.toTypedArray()

      sslSocket.parameters = sslParameters
    } else {
      super.configureTlsExtensions(sslSocket, hostname, protocols)
    }
  }

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =
    if (sslSocket is BCSSLSocket) {

          body =
            object : ForwardingRequestBody(transferKind.newRequestBody("def")) {
              override fun writeTo(sink: BufferedSink) {
                sinkReference.set(sink)
                super.writeTo(sink)
              }
            },
        ),
      )
    assertThat(readAscii(response.body.byteStream(), Int.MAX_VALUE))
      .isEqualTo("abc")
    assertFailsWith<IllegalStateException> {

      byteCount: Long,
    ): Long {
      require(byteCount >= 0L) { "byteCount < 0: $byteCount" }
      check(!closed) { "closed" }
      if (bytesRemaining == 0L) return -1

      val read = super.read(sink, minOf(bytesRemaining, byteCount))
      if (read == -1L) {
        carrier.noNewExchanges() // The server didn't supply the promised content length.
        val e = ProtocolException("unexpected end of stream")

    log("appendingSink($file)")

    return super.appendingSink(file, mustExist)
  }

  override fun atomicMove(
    source: Path,
    target: Path,
  ) {
    log("atomicMove($source, $target)")

    super.atomicMove(source, target)
  }

  override fun createDirectory(
    dir: Path,
    mustCreate: Boolean,
  ) {
    log("createDirectory($dir)")

    super.createDirectory(dir, mustCreate)
  }

        // Enable ALPN.
        val names = alpnProtocolNames(protocols)
        sslParameters.applicationProtocols = names.toTypedArray()

        sslSocket.sslParameters = sslParameters
      }
    } else {
      super.configureTlsExtensions(sslSocket, hostname, protocols)
    }
  }

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =
    if (sslSocket is org.openjsse.javax.net.ssl.SSLSocket) {

    super(channel);
    this.path = path;
  }

  TunnelingUnixSocket(File path, UnixSocketChannel channel, InetSocketAddress address) {
    this(path, channel);
    this.inetSocketAddress = address;
  }

  @Override public void connect(SocketAddress endpoint) throws IOException {
    this.inetSocketAddress = (InetSocketAddress) endpoint;
    super.connect(new UnixSocketAddress(path), 0);
  }