fun responseHeaders() {
    server.enqueue(
      MockResponse.Builder()
        .status("HTTP/1.0 200 Fantastic")
        .addHeader("A: c")
        .addHeader("B: d")
        .addHeader("A: e")
        .chunkedBody("ABCDE\nFGHIJ\nKLMNO\nPQR", 8)
        .build(),
    )
    val request = newRequest("/")
    val response = getResponse(request)
    assertThat(response.code).isEqualTo(200)

  internal enum class TransferKind {
    CHUNKED {
      override fun setBody(
        response: MockResponse.Builder,
        content: Buffer,
        chunkSize: Int,
      ) {
        response.chunkedBody(content, chunkSize)
      }
    },
    FIXED_LENGTH {
      override fun setBody(
        response: MockResponse.Builder,
        content: Buffer,
        chunkSize: Int,
      ) {

    server.enqueue(
      MockResponse.Builder()
        .clearHeaders()
        .addHeader("h1", "v1")
        .addHeader("h2", "v2")
        .chunkedBody("HelloBonjour", 1024)
        .trailers(headersOf("trailers", "boom"))
        .build(),
    )
    val call = client.newCall(Request(server.url("/")))
    val response = call.execute()