assertThat(response.body.string()).isEqualTo("abc")
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)

    // Note that although we have two routes available, we only use one. The retry is permitted
    // because there are routes available, but it chooses the existing connection since it isn't
    // yet considered unhealthy.
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(1)
  }

     * The call timeout spans the entire call: resolving DNS, connecting, writing the request body,
     * server processing, and reading the response body. If the call requires redirects or retries
     * all must complete within one timeout period.
     *
     * The default value is 0 which imposes no timeout.
     */
    fun callTimeout(
      timeout: Long,
      unit: TimeUnit,
    ) = apply {

    // two outgoing writes
    val sink = stream.getSink()
    sink.write(Buffer().writeUtf8("abcde"), 5)
    sink.write(Buffer().writeUtf8("fghij"), 5)
    sink.close()

    // verify the peer received one incoming frame
    assertThat(peer.takeFrame().type).isEqualTo(Http2.TYPE_HEADERS)
    val data = peer.takeFrame()
    assertThat(data.type).isEqualTo(Http2.TYPE_DATA)