creator.newSink(0).buffer().use {
      it.writeUtf8("Hello")
    }

    // Simulate a severe Filesystem failure on the first initialization.
    filesystem.setFaultyDelete(cacheDir / "k1.0.tmp", true)
    filesystem.setFaultyDelete(cacheDir, true)
    cache =
      DiskLruCache(filesystem, cacheDir, appVersion, 2, Int.MAX_VALUE.toLong(), taskRunner).also {
        toClose.add(it)
      }

    } catch (e: IOException) {
      RecordedResponse(request, null, null, null, e)
    }
  }

  /**
   * Tests that use this will fail unless boot classpath is set. Ex. `-Xbootclasspath/p:/tmp/alpn-boot-8.0.0.v20140317`
   */
  private fun enableProtocol(protocol: Protocol) {
    enableTls()
    client =
      client.newBuilder()
        .protocols(listOf(protocol, Protocol.HTTP_1_1))

  private lateinit var protocol: Protocol
  private lateinit var client: OkHttpClient
  private val fileSystem: FakeFileSystem = FakeFileSystem()
  private val cache: Cache = Cache(fileSystem, "/tmp/cache".toPath(), Long.MAX_VALUE)
  private lateinit var scheme: String

  private fun configureClientTestRule(): OkHttpClientTestRule {
    val clientTestRule = OkHttpClientTestRule()

      "sink:/cache/journal.bkp",
      "delete:/cache/journal.bkp",
      "metadataOrNull:/cache/journal",
      "metadataOrNull:/cache",
      "sink:/cache/journal.tmp",
      "metadataOrNull:/cache/journal",
      "atomicMove:/cache/journal.tmp",
      "atomicMove:/cache/journal",
      "appendingSink:/cache/journal",
    )
    events.clear()
    c.size()
    assertThat(events).isEmpty()
  }