while (!utf8.exhausted()) {
      require(utf8.readByte() == '.'.code.toByte())
      val vN = utf8.readDecimalLong()
      writeVariableLengthLong(vN)
    }
  }

  fun writeRelativeObjectIdentifier(s: String) {
    // Add a leading dot so each subidentifier has a dot prefix.
    val utf8 =
      Buffer()
        .writeByte('.'.code.toByte().toInt())
        .writeUtf8(s)

    val derWriter = DerWriter(buffer)

    derWriter.write(
      name = "test",
      tagClass = DerHeader.TAG_CLASS_UNIVERSAL,
      tag = 13L,
    ) {
      derWriter.writeRelativeObjectIdentifier("8571.3.2")
    }

    assertThat(buffer.readByteString()).isEqualTo("0D04c27B0302".decodeHex())
  }

  @Test fun `decode raw sequence`() {
    val buffer =
      Buffer()