@RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

  private var client = clientTestRule.newClient()

  @AfterEach internal fun tearDown() {
    factory.close()
  }

  @Test fun nonRetryableIOException() {
    val exception = IOException("Non-handshake exception")
    assertThat(retryTlsHandshake(exception)).isFalse()
  }

  fun request(): Request

  /**
   * Invokes the request immediately, and blocks until the response can be processed or is in error.
   *
   * To avoid leaking resources callers should close the [Response] which in turn will close the
   * underlying [ResponseBody].
   *
   * ```java
   * // ensure the response (and underlying response body) is closed
   * try (Response response = client.newCall(request).execute()) {
   *   ...

        }
        assertEquals(TlsVersion.TLS_1_3, response.handshake?.tlsVersion)
      }

      localhostInsecureRequest()
    } finally {
      Security.removeProvider("Conscrypt")
      client.close()
    }
  }

  @Test
  fun testRequestUsesPlayProvider() {
    assumeNetwork()

    try {
      try {

        } else {
          response.newBuilder()
            .body(exchange.openResponseBody(response))
            .build()
        }
      if ("close".equals(response.request.header("Connection"), ignoreCase = true) ||
        "close".equals(response.header("Connection"), ignoreCase = true)
      ) {
        exchange.noNewExchangesOnConnection()
      }

        throw IOException(npe)
      }
    }
  }

  /**
   * Does all the work to build an HTTPS connection over a proxy tunnel. The catch here is that a
   * proxy server can issue an auth challenge and then close the connection.
   *
   * @return the next plan to attempt, or null if no further attempt should be made either because
   *     we've successfully connected or because no further attempts should be made.
   */

      connectionUser =
        CallConnectionUser(
          call,
          client.connectionPool.delegate.connectionListener,
          chain,
        ),
    )
  }

  override fun close() {
    taskFaker.close()
  }

    while (!toClose.isEmpty()) {
      toClose.pop().close()
    }
    taskFaker.close()

    (filesystem.delegate as? FakeFileSystem)?.checkNoOpenFiles()
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)
  fun emptyCache(parameters: Pair<FileSystem, Boolean>) {
    setUp(parameters.first, parameters.second)
    cache.close()
    assertJournalEquals()
  }

      Request.Builder()
        .url(server.url("/"))
        .build(),
    ).execute().close()
    listener.removeUpToEvent<CallEnd>()
    val call =
      client.newCall(
        Request.Builder()
          .url(server.url("/"))
          .build(),
      )
    val response = call.execute()
    response.close()
    assertThat(listener.recordedEventTypes()).containsExactly(
      "CallStart",

    server!!.enqueue(MockResponse())
    server!!.enqueue(MockResponse())

    client.newCall(Request(server!!.url("/")))
      .execute().close()

    client.newCall(Request(server!!.url("/")))
      .execute().close()

    assertThat(listener.recordedEventTypes()).containsExactly(
      "ConnectStart",
      "ConnectEnd",
      "ConnectionAcquired",
      "ConnectionReleased",

   */
  internal const val PAYLOAD_LONG = 127

  /** Used when an unchecked exception was thrown in a listener. */
  internal const val CLOSE_CLIENT_GOING_AWAY = 1001

  /** Used when an empty close frame was received (i.e., without a status code). */
  internal const val CLOSE_NO_STATUS_CODE = 1005

  fun toggleMask(
    cursor: Buffer.UnsafeCursor,
    key: ByteArray,
  ) {
    var keyIndex = 0