* generated.
     */
    fun keyPair(keyPair: KeyPair) =
      apply {
        this.keyPair = keyPair
      }

    /**
     * Sets the public/private key pair used for this certificate. If unset a key pair will be
     * generated.
     */
    fun keyPair(
      publicKey: PublicKey,
      privateKey: PrivateKey,
    ) = apply {
      keyPair(KeyPair(publicKey, privateKey))
    }

    /**

  /** Multiple certificates generated from the same keypair have the same pin.  */
  @Test
  fun sameKeypairSamePin() {
    val heldCertificateA2 =
      HeldCertificate.Builder()
        .keyPair(certA1.keyPair)
        .serialNumber(101L)
        .build()
    val keypairACertificate2Pin = pin(heldCertificateA2.certificate)
    val heldCertificateB2 =
      HeldCertificate.Builder()
        .keyPair(certB1.keyPair)
        .serialNumber(201L)

          ),
      )
    assertThat(okHttpCertificateWithBadSignature.checkSignature(root.keyPair.public)).isFalse()

    // Wrong public key.
    assertThat(okHttpCertificate.checkSignature(certificate.keyPair.public)).isFalse()
  }

  @Test
  fun `EC issuer and signature`() {
    val root =
      HeldCertificate.Builder()
        .certificateAuthority(0)

  @Test @Disabled
  fun heldCertificate() {
    val heldCertificate: HeldCertificate = HeldCertificate.Builder().build()
    val certificate: X509Certificate = heldCertificate.certificate()
    val keyPair: KeyPair = heldCertificate.keyPair()
  }

  @Test @Disabled
  fun mediaType() {
    val mediaType: MediaType = MediaType.get("")
    val type: String = mediaType.type()
    val subtype: String = mediaType.subtype()

    val keyPair: KeyPair = heldCertificate.keyPair
    val certificatePem: String = heldCertificate.certificatePem()
    val privateKeyPkcs8Pem: String = heldCertificate.privateKeyPkcs8Pem()
    val privateKeyPkcs1Pem: String = heldCertificate.privateKeyPkcs1Pem()
  }

  @Test
  fun heldCertificateBuilder() {
    val keyPair: KeyPair = KeyPairGenerator.getInstance("").genKeyPair()

        .commonName("pinned intermediate")
        .signedBy(pinnedRoot)
        .build()
    val attackerSwitch =
      HeldCertificate.Builder()
        .serialNumber(5L)
        .keyPair(attackerIntermediate.keyPair) // share keys between compromised CA and leaf!
        .commonName("attacker")
        .addSubjectAlternativeName("attacker.com")
        .signedBy(pinnedIntermediate)
        .build()

 * **Handshake**: cipherSuite, localCertificates, localPrincipal, peerCertificates, peerPrincipal,
   tlsVersion
 * **HandshakeCertificates**: keyManager, trustManager
 * **Headers**: size
 * **HeldCertificate**: certificate, keyPair
 * **HttpLoggingInterceptor**: level
 * **HttpUrl**: encodedFragment, encodedPassword, encodedPath, encodedPathSegments, encodedQuery,
   encodedUsername, fragment, host, password, pathSegments, pathSize, port, query,

    val privateKey =
      keyFactory.generatePrivate(
        PKCS8EncodedKeySpec(privateKeyBytes.toByteArray()),
      )
    val heldCertificate =
      HeldCertificate.Builder()
        .keyPair(publicKey, privateKey)
        .commonName("cash.app")
        .validityInterval(0L, 1000L)
        .rsa2048()
        .build()
    assertThat(
      """
      |-----BEGIN CERTIFICATE-----