var bytesWritten: Long = 0
                while (bytesWritten < contentLength) {
                  val byteCount = Math.min(buffer.size.toLong(), contentLength - bytesWritten).toInt()
                  bytesWritten += byteCount.toLong()
                  sink.write(buffer, 0, byteCount)
                }
              }
            },
        ),
      )
    assertContent("", response)

    val cancelClient =
      client
        .newBuilder()
        .eventListener(
          object : EventListener() {
            override fun responseBodyEnd(
              call: Call,
              byteCount: Long,
            ) {
              call.cancel()
            }
          },
        ).build()
    val call = cancelClient.newCall(Request(server.url("/")))
    val response = call.execute()