* the same key can see different data.
   */
  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)
  fun readAndWriteOverlapsMaintainConsistency(parameters: Pair<FileSystem, Boolean>) {
    setUp(parameters.first, parameters.second)
    Assumptions.assumeFalse(windows) // Can't edit while a read is in progress.

    val v1Creator = cache.edit("k1")!!

     *   increase availability of multi-homed services.
     *
     * * **Stale pooled connections.** The [ConnectionPool] reuses sockets
     *   to decrease request latency, but these connections will occasionally time out.
     *
     * * **Unreachable proxy servers.** A [ProxySelector] can be used to

    waitForDataFrames(Http2Connection.OKHTTP_CLIENT_WINDOW_SIZE)

    // Cancel the call and discard what we've buffered for the response body. This should free up
    // the connection flow-control window so new requests can proceed.
    call1.cancel()
    assertThat(
      response1.body.source().discard(1, TimeUnit.SECONDS),
      "Call should not have completed successfully.",
    ).isFalse()

  }

  /**
   * Webservers may set the initial window size to zero, which is a special case because it means
   * that we have to flush headers immediately before any request body can be sent.
   * https://github.com/square/okhttp/issues/2543
   */
  @Test fun peerSetsZeroFlowControl() {
    peer.setClient(true)

    // Write the mocking script.