internal fun CacheControl.commonToString(): String {
  var result = headerValue
  if (result == null) {
    result =
      buildString {
        if (noCache) append("no-cache, ")
        if (noStore) append("no-store, ")
        if (maxAgeSeconds != -1) append("max-age=").append(maxAgeSeconds).append(", ")
        if (sMaxAgeSeconds != -1) append("s-maxage=").append(sMaxAgeSeconds).append(", ")
        if (isPrivate) append("private, ")

        return CacheStrategy(request, null)
      }

      // If this response shouldn't have been stored, it should never be used as a response source.
      // This check should be redundant as long as the persistence store is well-behaved and the
      // rules are constant.
      if (!isCacheable(cacheResponse, request)) {
        return CacheStrategy(request, null)
      }

      val requestCaching = request.cacheControl

    internal var noTransform: Boolean = false
    internal var immutable: Boolean = false

    /** Don't accept an unvalidated cached response. */
    fun noCache() = commonNoCache()

    /** Don't store the server's response in any cache. */
    fun noStore() = commonNoStore()

    /**
     * Only accept the response if it is in the cache. If the response isn't cached, a `504

            "Accept-Charset",
          ),
        body = "A",
      ),
    )
    client =
      client.newBuilder()
        .cache(cache)
        .build()

    // Store a response in the cache.
    val url = server.url("/")
    val request1SentAt = System.currentTimeMillis()
    executeSynchronously("/", "Accept-Language", "fr-CA", "Accept-Charset", "UTF-8")
      .assertCode(200)

  fun receiveData(
    source: BufferedSource,
    length: Int,
  ) {
    lock.assertNotHeld()

    this.source.receive(source, length.toLong())
  }

  /** Accept headers from the network and store them until the client calls [takeHeaders]. */
  fun receiveHeaders(
    headers: Headers,
    inFinished: Boolean,
  ) {
    lock.assertNotHeld()

    val open: Boolean
    this.withLock {

        .addHeader("Cache-Control: no-store")
        .build(),
    )
  }

  @Test
  fun cacheControlNoStoreAndExpirationDateInTheFuture() {
    assertNotCached(
      MockResponse.Builder()
        .addHeader("Last-Modified: " + formatDate(-2, TimeUnit.HOURS))
        .addHeader("Expires: " + formatDate(1, TimeUnit.HOURS))
        .addHeader("Cache-Control: no-store")
        .build(),
    )
  }

        .maxStale(2.seconds)
        .minFresh(3.seconds)
        .onlyIfCached()
        .noTransform()
        .immutable()
        .build()
    assertThat(cacheControl.toString()).isEqualTo(
      "no-cache, no-store, max-age=1, max-stale=2, min-fresh=3, only-if-cached, no-transform, immutable",
    )
    assertThat(cacheControl.noCache).isTrue()
    assertThat(cacheControl.noStore).isTrue()