}
    return response
      .newBuilder()
      .body(uppercaseBody)
      .build()
  }

  private fun uppercaseSource(source: BufferedSource): ForwardingSource {
    return object : ForwardingSource(source) {
      @Throws(IOException::class)
      override fun read(
        sink: Buffer,
        byteCount: Long,
      ): Long {
        val buffer = Buffer()

        override fun contentLength(): Long = 5

        override fun source(): BufferedSource {
          val source = Buffer().writeUtf8("hello")
          return object : ForwardingSource(source) {
            override fun close() {
              closed = true
              super.close()
            }
          }.buffer()
        }
      }
    body.source().close()

import okhttp3.internal.connection.BufferedSocket
import okhttp3.internal.platform.Platform
import okio.BufferedSink
import okio.BufferedSource
import okio.ForwardingSink
import okio.ForwardingSource
import okio.asOkioSocket
import okio.buffer

/**
 * Adapts a [java.net.Socket] to MockWebServer's needs.
 *
 * Note that [asOkioSocket] returns a socket that closes the underlying [java.net.Socket] when both

import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.OkHttpClientTestRule
import okhttp3.Protocol
import okhttp3.Request
import okhttp3.Response
import okhttp3.ResponseBody
import okio.Buffer
import okio.ForwardingSource
import okio.buffer
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension
import org.junit.jupiter.api.fail

class ExecuteAsyncTest {
  @RegisterExtension

import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;
import okio.Buffer;
import okio.BufferedSource;
import okio.ForwardingSource;
import okio.Okio;
import okio.Source;

public final class Progress {

  public void run() throws Exception {
    Request request = new Request.Builder()

import okhttp3.Response
import okhttp3.ResponseBody
import okhttp3.internal.http.ExchangeCodec
import okhttp3.internal.http.RealResponseBody
import okio.Buffer
import okio.ForwardingSink
import okio.ForwardingSource
import okio.Sink
import okio.Socket
import okio.Source
import okio.buffer

/**
 * Transmits a single HTTP request and a response pair. This layers connection management and events