fun testFileDescriptorRead() {
    assertOnFileDescriptor(content = "Hello") { fd ->
      val requestBody = fd.toRequestBody()

      val buffer = Buffer()
      requestBody.writeTo(buffer)
      assertThat(buffer.readUtf8()).isEqualTo("Hello")
    }
  }

  @Test
  fun testFileDescriptorDefaultMediaType() {
    assertOnFileDescriptor { fd ->
      val requestBody = fd.toRequestBody()

  }

  // 2. Normalize, from bufferB to bufferA.
  val normalized = normalizeNfc(bufferB.readUtf8())
  bufferA.writeUtf8(normalized)

  // 3. For each label, convert/validate Punycode.
  val decoded = Punycode.decode(bufferA.readUtf8()) ?: return null

  // 4.1 Validate.

  // Must be NFC.
  if (decoded != normalizeNfc(decoded)) return null

    assertThat(recordedRequest1.method).isEqualTo("POST")
    assertThat(recordedRequest1.body.readUtf8()).isEqualTo(body)
    assertThat(recordedRequest1.headers["Authorization"]).isNull()
    val recordedRequest2 = server.takeRequest()
    assertThat(recordedRequest2.method).isEqualTo("POST")
    assertThat(recordedRequest2.body.readUtf8()).isEqualTo(body)
    assertThat(recordedRequest2.headers["Authorization"]).isEqualTo(credential)

    val source1 = relay.newSource()!!.buffer()
    val source2 = relay.newSource()!!.buffer()
    assertThat(source1.readUtf8(5)).isEqualTo("abcde")
    assertThat(source2.readUtf8(5)).isEqualTo("abcde")
    assertThat(source2.readUtf8(5)).isEqualTo("fghij")
    assertThat(source1.readUtf8(5)).isEqualTo("fghij")
    assertThat(source1.exhausted()).isTrue()
    assertThat(source2.exhausted()).isTrue()
    source1.close()

        "abc",
      ),
    )
    assertThat(partAbc.body.readUtf8()).isEqualTo("abcd\r\nefgh")

    val partIjk = parts.nextPart()!!
    assertThat(partIjk.headers).isEqualTo(
      headersOf(
        "Content-Type",
        "text/plain; charset=utf-8",
        "Content-ID",
        "ijk",
      ),
    )
    assertThat(partIjk.body.readUtf8()).isEqualTo("ijkl\r\nmnop\r\n")

    assertThat(parts.nextPart()).isNull()

        return null
      }

      if (dot < limit) {
        result.writeByte('.'.code)
        pos = dot + 1
      } else {
        break
      }
    }

    return result.readUtf8()
  }

  private fun encodeLabel(
    string: String,
    pos: Int,
    limit: Int,
    result: Buffer,
  ): Boolean {
    if (!string.requiresEncode(pos, limit)) {

    id: String?,
    type: String?,
    data: Buffer,
  ) {
    if (data.size != 0L) {
      lastId = id
      data.skip(1L) // Leading newline.
      callback.onEvent(id, type, data.readUtf8())
    }
  }

  companion object {
    val options =
      Options.of(
        // 0
        "\r\n".encodeUtf8(),
        // 1
        "\r".encodeUtf8(),
        // 2

    testRequest {
      val url = URI(mockServer.endpoint + "/person?name=peter").toURL()

      val connection = url.openConnection() as HttpURLConnection

      assertThat(connection.inputStream.source().buffer().readUtf8()).contains("Peter the person")
    }
  }

  @Test
  fun testUrlConnectionPlaintextProxied() {
    testRequest {
      val proxy =
        Proxy(
          Proxy.Type.HTTP,

    operatorA.write(36, bufferA, 33)
    operatorB.read(0, bufferB, 9)
    assertThat(bufferB.readUtf8()).isEqualTo("Dodgson!\n")
    operatorA.read(9, bufferA, 27)
    assertThat(bufferA.readUtf8()).isEqualTo("You shouldn't use my name.\n")
    operatorB.read(36, bufferB, 33)
    assertThat(bufferB.readUtf8()).isEqualTo("Dodgson, we've got Dodgson here!\n")
  }

  @Test
  fun largeRead() {

    val buffer = Buffer()
    body.writeTo(buffer)
    assertThat(body.contentLength()).isEqualTo(buffer.size)
    assertThat(buffer.readUtf8()).isEqualTo(expected)

    val buffer2 = Buffer()
    body.writeTo(buffer2)
    assertThat(body.contentLength()).isEqualTo(buffer2.size)
    assertThat(buffer2.readUtf8()).isEqualTo(expected)
  }

  @Test
  fun writeTwiceWithOneShot() {
    val expected =
      """
      |--123