`new Challenge(scheme, realm)` you must provide non-null values. These were
    never null in challenges created by OkHttp, but could have been null in
    application code that creates challenges.

 *  New: The `TlsVersion` of a `Handshake` is now non-null. If you are calling
    `Handshake.get()` with a null TLS version, you must instead now provide a

        snapshot1.assertValue(1, "a")
        snapshot2.assertValue(1, "a")
      }
    }
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)
  fun `remove while reading creates zombie that is removed when read finishes`(parameters: Pair<FileSystem, Boolean>) {
    setUp(parameters.first, parameters.second)
    val afterRemoveFileContents = if (windows) "a" else null

    set("k1", "a", "a")

      this.certificatePinner =
        builder.certificatePinner
          .withCertificateChainCleaner(certificateChainCleaner!!)
    }

    verifyClientState()
  }

  /**
   * Creates an [Address] of out of the provided [HttpUrl]
   * that uses this client’s DNS, TLS, and proxy configuration.
   */
  fun address(url: HttpUrl): Address {
    var useSslSocketFactory: SSLSocketFactory? = null

    val actual = source!!.buffer().readUtf8()
    assertThat(actual).isEqualTo(expected)
  }

  /**
   * Returns true when all work currently in progress by the watchdog have completed. This method
   * creates more work for the watchdog and waits for that work to be executed. When it is, we know
   * work that preceded this call is complete.
   */
  private fun awaitWatchdogIdle() {
    val latch = CountDownLatch(1)