.addTrustedCertificate(cert)
          .build()

      clientBuilder
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )
    }

    val client = clientBuilder.build()

    val request =
      Request.Builder()
        .url("https://valid-isrgrootx1.letsencrypt.org/robots.txt")
        .build()

      }
    } catch (e: UnsupportedOperationException) {
      // https://docs.oracle.com/javase/9/docs/api/javax/net/ssl/SSLSocket.html#getApplicationProtocol--
      null
    }
  }

  override fun trustManager(sslSocketFactory: SSLSocketFactory): X509TrustManager? {
    // Not supported due to access checks on JDK 9+:
    // java.lang.reflect.InaccessibleObjectException: Unable to make member of class

      clientTestRule.newClientBuilder()
        .fastFallback(false) // Avoid data races.
        .dns(dns)
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )
        .build()
    val serverHandshakeCertificates =
      HandshakeCertificates.Builder()
        .heldCertificate(certificate)
        .build()

        override fun connectFailed(
          uri: URI,
          socketAddress: SocketAddress,
          e: IOException,
        ) {}
      }

    val trustManager = get().platformTrustManager()
    val sslContext = get().newSSLContext()
    sslContext.init(null, null, null)

    // new client, may share all same fields but likely different connection pool
    assertNotSame(

        .build()

    client =
      client.newBuilder()
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )
        .build()
    server.useHttps(handshakeCertificates.sslSocketFactory())
  }

    val anotherClient =
      client.newBuilder()
        .sslSocketFactory(
          handshakeCertificates2.sslSocketFactory(),
          handshakeCertificates2.trustManager,
        )
        .build()

    // This client fails to connect because the new SSL socket factory refuses.
    assertFailsWith<IOException> {
      anotherClient.newCall(request).execute()

          ),
        body = "ABC.2",
      ),
    )
    client =
      client.newBuilder()
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )
        .hostnameVerifier(nullHostnameVerifier)
        .build()
    val request = Request(server.url("/"))
    val response1: Response = client.newCall(request).execute()

            ConnectionSpec.MODERN_TLS,
          ),
        )
        .sslSocketFactory(
          suppressTlsFallbackClientSocketFactory(),
          handshakeCertificates.trustManager,
        )
        .build()
    executeSynchronously("/").assertBody("abc")
  }

  @Test
  fun recoverFromTlsHandshakeFailure_tlsFallbackScsvEnabled() {
    platform.assumeNotConscrypt()

import java.util.logging.Level
import java.util.logging.Logger
import javax.net.ServerSocketFactory
import javax.net.ssl.SSLContext
import javax.net.ssl.SSLSocket
import javax.net.ssl.SSLSocketFactory
import javax.net.ssl.TrustManager
import javax.net.ssl.X509TrustManager
import mockwebserver3.SocketPolicy.DisconnectAfterRequest
import mockwebserver3.SocketPolicy.DisconnectAtEnd
import mockwebserver3.SocketPolicy.DisconnectAtStart

  fun handshakeCertificates() {
    val handshakeCertificates = HandshakeCertificates.Builder().build()
    val keyManager: X509KeyManager = handshakeCertificates.keyManager()
    val trustManager: X509TrustManager = handshakeCertificates.trustManager()
  }

  @Test @Disabled
  fun handshakeCertificatesBuilder() {
    var builder: HandshakeCertificates.Builder = HandshakeCertificates.Builder()