assertThat(certificate.getSubjectX500Principal().name).isEqualTo("CN=cash.app")
  }

  @Test
  fun organizationalUnit() {
    val heldCertificate =
      HeldCertificate.Builder()
        .commonName("cash.app")
        .organizationalUnit("cash")
        .build()
    val certificate = heldCertificate.certificate
    assertThat(certificate.getSubjectX500Principal().name).isEqualTo(

      apply {
        this.commonName = cn
      }

    /** Sets the certificate's organizational unit (OU). If unset this field will be omitted. */
    fun organizationalUnit(ou: String) =
      apply {
        this.organizationalUnit = ou
      }

    /** Sets this certificate's serial number. If unset the serial number will be 1. */
    fun serialNumber(serialNumber: BigInteger) =
      apply {

    )
  }

  @Test
  fun `certificate attributes`() {
    val certificate =
      HeldCertificate.Builder()
        .certificateAuthority(3)
        .commonName("Jurassic Park")
        .organizationalUnit("Gene Research")
        .addSubjectAlternativeName("*.example.com")
        .addSubjectAlternativeName("www.example.org")
        .validityInterval(-1000L, 2000L)
        .serialNumber(17L)
        .build()

    builder = builder.validityInterval(0L, 0L)
    builder = builder.duration(0L, TimeUnit.SECONDS)
    builder = builder.addSubjectAlternativeName("")
    builder = builder.commonName("")
    builder = builder.organizationalUnit("")
    builder = builder.serialNumber(BigInteger.ZERO)
    builder = builder.serialNumber(0L)
    builder = builder.keyPair(keyPair)
    builder = builder.keyPair(keyPair.public, keyPair.private)