val request = Request(server.url("/a"))
    val call = client.newCall(request)
    call.enqueue(
      object : Callback {
        override fun onFailure(
          call: Call,
          e: IOException,
        ) {
          failureRef.set(true)
          latch.countDown()
        }

        override fun onResponse(
          call: Call,
          response: Response,
        ) {

    assertThat(response.header("Content-Length")).isEqualTo("3")
    assertThat(response.header("etag")).isEqualTo("foo")
  }

  /** Exercise the cache format in OkHttp 2.7 and all earlier releases.  */
  @Test
  fun testGoldenCacheHttpsResponseOkHttp27() {
    val url = server.url("/")
    val urlKey = key(url)
    val prefix = get().getPrefix()
    val entryMetadata =
      """