* this client silently recovers from the following problems:
     *
     * * **Unreachable IP addresses.** If the URL's host has multiple IP addresses,
     *   failure to reach any individual IP address doesn't fail the overall request. This can
     *   increase availability of multi-homed services.
     *
     * * **Stale pooled connections.** The [ConnectionPool] reuses sockets

   *
   * The deadline to respond to this ping attempts to limit the cost of being wrong. If it is too
   * long, streams created while we await the pong will reuse broken connections and inevitably
   * fail. If it is too short, slow connections will be marked as failed and extra TCP and TLS
   * handshakes will be required.
   *
   * The deadline is currently hardcoded. We may make this configurable in the future!
   */

      if (!success) break
      messageCount++
      val queueSize = webSocket.queueSize()
      assertThat(queueSize).isBetween(0L, messageCount * message.size)
      // Expect to fail before enqueueing 32 MiB.
      assertThat(messageCount).isLessThan(32L)
    }

    // Confirm all sent messages were received, followed by a client-initiated close.
    val server = serverListener.assertOpen()

   * proceed normally. The connection will also proceed normally if the client presents no
   * certificate at all! But if the client presents an untrusted certificate the handshake
   * will fail and no connection will be established.
   */
  fun requestClientAuth() {
    this.clientAuth = CLIENT_AUTH_REQUESTED
  }

  /**

        .addHeader("Vary: Accept-Encoding")
        .addHeader("Cache-Control: max-age=60")
        .build(),
    )
    server.enqueue(
      MockResponse.Builder()
        .body("FAIL")
        .build(),
    )
    assertThat(get(server.url("/")).body.string()).isEqualTo("ABCABCABC")
    assertThat(get(server.url("/")).body.string()).isEqualTo("ABCABCABC")
  }

  @Test

      ) ?: return null

    // If we coalesced our connection, remember the replaced connection's route. That way if the
    // coalesced connection later fails we don't waste a valid route.
    if (planToReplace != null) {
      nextRouteToTry = planToReplace.route
      planToReplace.closeQuietly()
    }

    connectionUser.connectionAcquired(result)

    } catch (uhe: UnknownHostException) {
      assumeTrue(false, "requires network")
    }
  }

  @JvmStatic
  fun assumeNotWindows() {
    assumeFalse(windows, "This test fails on Windows.")
  }

  @JvmStatic
  val windows: Boolean
    get() = System.getProperty("os.name", "?").startsWith("Windows")

  /**

    plan0.tcpConnectThrowable = IOException("boom!")
    val plan1 = routePlanner.addPlan()
    plan1.tcpConnectDelayNanos = 270.ms // Connect fail at time = 520 ms.
    plan1.tcpConnectThrowable = IOException("boom!")
    val plan2 = routePlanner.addPlan()
    plan2.tcpConnectDelayNanos = 30.ms // Connect fail at time = 530 ms.
    plan2.tcpConnectThrowable = IOException("boom!")
    val plan3 = routePlanner.addPlan()

    timeout-minutes: 30
    if: github.ref == 'refs/heads/master' || contains(github.event.pull_request.labels.*.name, 'android') || contains(github.event.pull_request.labels.*.name, 'renovate')

    strategy:
      fail-fast: false
      matrix:
        api-level:
          - 21
          - 29
          - 34

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:

    assertThat(rstStream.streamId).isEqualTo(2)
    assertThat(rstStream.errorCode).isEqualTo(ErrorCode.CANCEL)
  }

  /**
   * When writing a set of headers fails due to an `IOException`, make sure the writer is left
   * in a consistent state so the next writer also gets an `IOException` also instead of
   * something worse (like an [IllegalStateException].
   *
   *