assertArrayEquals(arrayOf("TLSv1.1", "TLSv1.2"), socket.enabledProtocols)
  }

  internal class FakeSslSocket : DelegatingSSLSocket(null) {
    private lateinit var enabledProtocols: Array<String>
    private lateinit var supportedCipherSuites: Array<String>
    private lateinit var enabledCipherSuites: Array<String>

    override fun getEnabledProtocols(): Array<String> = enabledProtocols

    when {
      PlatformVersion.majorVersion > 11 -> {
        assertThat(s.enabledProtocols.toList()).containsExactly(
          "TLSv1.3",
          "TLSv1.2",
        )
      }

      // Not much we can guarantee on JDK 11.
      PlatformVersion.majorVersion == 11 -> {
        assertThat(s.enabledProtocols.toList()).contains(
          "TLSv1.2",
        )
      }

    val tlsVersionsIntersection =
      if (tlsVersionsAsString != null) {
        sslSocket.enabledProtocols.intersect(tlsVersionsAsString, naturalOrder())
      } else {
        sslSocket.enabledProtocols
      }

    // In accordance with https://tools.ietf.org/html/draft-ietf-tls-downgrade-scsv-00 the SCSV

      ?: throw UnknownServiceException(
        "Unable to find acceptable protocols." +
          " isFallback=$isTlsFallback," +
          " modes=$connectionSpecs," +
          " supported protocols=${sslSocket.enabledProtocols!!.contentToString()}",
      )
  }

  /**
   * Returns a copy of this connection with the next connection spec to try, or null if no other
   * compatible connection specs are available.
   */