server.enqueue(MockResponse(body = "b"))
    val request = Request(server.url("/"))
    val responseA = client.newCall(request).execute()
    assertThat(responseA.body.string()).isEqualTo("a")
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(0)
    val responseB = client.newCall(request).execute()
    assertThat(responseB.body.string()).isEqualTo("b")
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(1)

        .build()
    val request1 = Request.Builder().url(server.url("/")).build()
    val response1 = client.newCall(request1).execute()
    assertThat(response1.body.string()).isEqualTo("abc")
    val request2 = Request.Builder().url(server.url("/")).build()
    val response2 = client.newCall(request2).execute()
    assertThat(response2.body.string()).isEqualTo("def")

    // The HTTP calls should share a single connection.

              val responseA = client.newCall(requestA).execute()
              assertThat(responseA.body.string()).isEqualTo("a")
            }
            chain.proceed(chain.request())
          },
        ).build()
    val requestB =
      Request
        .Builder()
        .url(server.url("/b"))
        .build()
    val responseB = client.newCall(requestB).execute()

        .put(ValidRequestBody())
        .build()
    client.newCall(request).execute().use {
      assertEquals(201, it.code)
    }

    request =
      Request
        .Builder()
        .url(endpointUrl)
        .head()
        .build()
    client.newCall(request).execute().use {
      assertEquals(204, it.code)
    }

    request =
      Request

  private val server = MockWebServer()

  @Test
  fun defaultConfigIsNoTimeout() {
    val request =
      Request
        .Builder()
        .url(server.url("/"))
        .build()
    val call = client.newCall(request)
    assertThat(call.timeout().timeoutNanos()).isEqualTo(0)
  }

  @Test
  fun configureClientDefault() {
    val request =
      Request
        .Builder()
        .url(server.url("/"))

    val call1 = localClient.newCall(Request(server.url("/")))

    call1.execute().use { response ->
      assertThat(response.body.string()).isEqualTo("Req1")
      assertThat(response.handshake).isNotNull()
      assertThat(response.protocol == Protocol.HTTP_1_1)
    }

    eventListener.closed = true

    val call2 = localClient.newCall(Request(server.url("/")))

      )
    serverIpv4.enqueue(
      MockResponse(body = "unexpected call to IPv4"),
    )
    serverIpv6.enqueue(
      MockResponse(body = "hello from IPv6"),
    )

    val call = client.newCall(Request(url))
    val response = call.execute()
    assertThat(response.body.string()).isEqualTo("hello from IPv6")

    // In the process we made one successful connection attempt.

      MockResponse
        .Builder()
        .status("HTTP/1.1 200 ${"O".repeat(256 * 1024)}K")
        .body("I'm not even supposed to be here today.")
        .build(),
    )
    val call = client.newCall(Request(url = server.url("/")))
    assertFailsWith<IOException> {
      call.execute()
    }
  }

  /** Use a header that exceeds the limits on its own. */
  @Test
  fun largeResponseHeader() {

    server.enqueue(mockResponse.build())

    client.newCall(request).execute().use {
      it.body.bytes()
    }
    return client.newCall(request).execute()
  }

  private operator fun get(url: HttpUrl): Response {
    val request =
      Request
        .Builder()
        .url(url)
        .build()
    return client.newCall(request).execute()
  }

  private fun writeFile(

  }

  @AfterEach
  fun tearDown() {
    executorService.shutdown()
  }

  @Test
  @Throws(IOException::class)
  fun http1DoesntSupportDuplex() {
    val call =
      client.newCall(
        Request
          .Builder()
          .url(server.url("/"))
          .post(AsyncRequestBody())
          .build(),
      )
    assertFailsWith<ProtocolException> {
      call.execute()