server.enqueue(
      MockResponse(body = "unused"),
    ) // to keep the server alive
    val response = getResponse(newRequest("/"))
    val source = response.body.source()
    source.timeout().timeout(1000, TimeUnit.MILLISECONDS)
    assertThat(source.readByte()).isEqualTo('A'.code.toByte())
    assertThat(source.readByte()).isEqualTo('B'.code.toByte())
    assertThat(source.readByte()).isEqualTo('C'.code.toByte())

        .addHeader("Content-Range: bytes 1000-1001/2000")
        .build(),
    )
    server.enqueue(
      MockResponse.Builder()
        .body("BB")
        .build(),
    )
    val url = server.url("/")
    val request =
      Request.Builder()
        .url(url)
        .header("Range", "bytes=1000-1001")
        .build()