|Content-Type: application/pdf; charset=utf-8
      |
      |Jesse’s Resumé
      |--AaB03x--
      |
      """.trimMargin().replace("\n", "\r\n")
    val body =
      MultipartBody.Builder("AaB03x")
        .setType(MultipartBody.FORM)
        .addFormDataPart(
          "attachment",
          "resumé.pdf",
          "Jesse’s Resumé".toRequestBody("application/pdf".toMediaTypeOrNull()),
        )

   * test makes a single call with two duplex requests!
   */
  @Test
  fun duplexWithAuthChallenge() {
    enableProtocol(Protocol.HTTP_2)
    val credential = basic("jesse", "secret")
    client =
      client.newBuilder()
        .authenticator(RecordingOkAuthenticator(credential, null))
        .build()
    val body1 =
      MockStreamHandler()

              }

              println("Authenticating for response: $response")
              println("Challenges: ${response.challenges()}")
              val credential = Credentials.basic("jesse", "password1")
              return response.request.newBuilder()
                  .header("Authorization", credential)
                  .build()
            }
          })
          .build()