document's age at the time it was served based on "Last-Modified". Default expiration dates aren't used for URIs
containing a query.

 - CallStart
 - **CacheHit**
 - CallEnd

### Cache Miss

Under a cache miss the normal request events are seen but an additional event shows the presence of the cache.

    cache = makeCache()
    client = client.newBuilder().cache(cache).build()
    return cache
  }

  private fun makeCache(): Cache {
    val cacheDir = File.createTempFile("cache-", ".dir")
    cacheDir.delete()
    return Cache(cacheDir, (1024 * 1024).toLong())
  }

  private fun OkHttpClient.newCallWithListener(request: Request): Call =
    newCall(request)
      .apply {

    Thread.sleep(10) // Make sure the timestamps are unique.
    val cacheHit =
      executeSynchronously(
        "/",
        "Accept-Language",
        "en-US",
        "Accept-Charset",
        "UTF-8",
      )

    // Check the merged response. The request is the application's original request.
    cacheHit
      .assertCode(200)
      .assertBody("A")
      .assertHeaders(

    if (networkRequest == null) {
      return cacheResponse!!
        .newBuilder()
        .cacheResponse(cacheResponse.stripBody())
        .build()
        .also {
          chain.eventListener.cacheHit(call, it)
        }
    }

    if (cacheResponse != null) {
      chain.eventListener.cacheConditionalHit(call, cacheResponse)
    } else if (cache != null) {
      chain.eventListener.cacheMiss(call)
    }

	public static final field NONE Lokhttp3/EventListener;
	public fun <init> ()V
	public fun cacheConditionalHit (Lokhttp3/Call;Lokhttp3/Response;)V
	public fun cacheHit (Lokhttp3/Call;Lokhttp3/Response;)V
	public fun cacheMiss (Lokhttp3/Call;)V
	public fun callEnd (Lokhttp3/Call;)V
	public fun callFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun callStart (Lokhttp3/Call;)V

	public static final field NONE Lokhttp3/EventListener;
	public fun <init> ()V
	public fun cacheConditionalHit (Lokhttp3/Call;Lokhttp3/Response;)V
	public fun cacheHit (Lokhttp3/Call;Lokhttp3/Response;)V
	public fun cacheMiss (Lokhttp3/Call;)V
	public fun callEnd (Lokhttp3/Call;)V
	public fun callFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun callStart (Lokhttp3/Call;)V

    cache =
      DiskLruCache(filesystem, cacheDir, appVersion, 2, maxSize.toLong(), taskRunner).also {
        toClose.add(it)
      }
    synchronized(cache) { cache.initialize() }
  }

  @BeforeEach
  fun setUp() {
    if (filesystem.exists(cacheDir)) {
      filesystem.deleteRecursively(cacheDir)
    }
    journalFile = cacheDir / DiskLruCache.JOURNAL_FILE
    journalBkpFile = cacheDir / DiskLruCache.JOURNAL_FILE_BACKUP

): Headers.Builder = builder.addLenient(line)

internal fun addHeaderLenient(
  builder: Headers.Builder,
  name: String,
  value: String,
): Headers.Builder = builder.addLenient(name, value)

internal fun cacheGet(
  cache: Cache,
  request: Request,
): Response? = cache.get(request)

internal fun applyConnectionSpec(
  connectionSpec: ConnectionSpec,
  sslSocket: SSLSocket,
  isFallback: Boolean,

  private inner class RealCacheRequest(
    private val editor: DiskLruCache.Editor,
  ) : CacheRequest {
    private val cacheOut: Sink = editor.newSink(ENTRY_BODY)
    private val body: Sink
    var done = false

    init {
      this.body =
        object : ForwardingSink(cacheOut) {
          @Throws(IOException::class)
          override fun close() {
            synchronized(this@Cache) {

    server.enqueue(MockResponse(body = "abc"))

    val ctxt = InstrumentationRegistry.getInstrumentation().targetContext.applicationContext

    val cacheSize = 1L * 1024 * 1024 // 1MB
    val cache = Cache(ctxt.cacheDir.resolve("testCache"), cacheSize)

    try {
      client =
        client
          .newBuilder()
          .cache(cache)
          .build()

      val request =
        Request