assertThat(adapter.fromDer(bytes)).isEqualTo(sequenceOf)
    assertThat(adapter.toDer(sequenceOf)).isEqualTo(bytes)
  }

  @Test fun `point with only x set`() {
    val bytes = "3003800109".decodeHex()
    val point = Point(9L, null)
    assertThat(Point.ADAPTER.fromDer(bytes)).isEqualTo(point)
    assertThat(Point.ADAPTER.toDer(point)).isEqualTo(bytes)
  }

  @Test fun `point with only y set`() {

            )

        return choice to choice.fromDer(reader)
      }

      override fun toDer(
        writer: DerWriter,
        value: Pair<DerAdapter<*>, Any?>,
      ) {
        val (adapter, v) = value
        (adapter as DerAdapter<Any?>).toDer(writer, v)
      }

      override fun toString(): String = choices.joinToString(separator = " OR ")
    }
  }

  /**

  @Test fun `time before 2050 uses UTC_TIME`() {
    val utcTimeDer = "170d3439313233313233353935395a".decodeHex()

    val decoded = CertificateAdapters.time.fromDer(utcTimeDer)
    val encoded = CertificateAdapters.time.toDer(decoded)

    assertThat(decoded).isEqualTo(date("2049-12-31T23:59:59.000+0000").time)
    assertThat(encoded).isEqualTo(utcTimeDer)
  }

  @Test fun `time not before 2050 uses GENERALIZED_TIME`() {

        }
      }

      override fun toDer(
        writer: DerWriter,
        value: Long,
      ) {
        // [1950-01-01T00:00:00..2050-01-01T00:00:00Z)
        if (value in -631_152_000_000L until 2_524_608_000_000L) {
          Adapters.UTC_TIME.toDer(writer, value)
        } else {
          Adapters.GENERALIZED_TIME.toDer(writer, value)
        }
      }
    }

  /**
   * ```

      // Signature.
      val signature =
        Signature.getInstance(tbsCertificate.signatureAlgorithmName).run {
          initSign(issuerKeyPair.private)
          update(CertificateAdapters.tbsCertificate.toDer(tbsCertificate).toByteArray())
          sign().toByteString()
        }

      // Complete signed certificate.
      val certificate =
        Certificate(
          tbsCertificate = tbsCertificate,