assertThat(Adapters.INTEGER_AS_BIG_INTEGER.toDer(bigInteger)).isEqualTo(bytes)
  }

  @Test fun `utf8 string`() {
    val bytes = "0c04f09f988e".decodeHex()
    assertThat(Adapters.UTF8_STRING.fromDer(bytes)).isEqualTo("\uD83D\uDE0E")
    assertThat(Adapters.UTF8_STRING.toDer("\uD83D\uDE0E")).isEqualTo(bytes)
  }

  @Test fun `ia5 string`() {
    val bytes = "16026869".decodeHex()

  override fun toString(): String = "${name.utf8()}: ${value.utf8()}"

  companion object {
    // Special header names defined in HTTP/2 spec.
    @JvmField val PSEUDO_PREFIX: ByteString = ":".encodeUtf8()

    const val RESPONSE_STATUS_UTF8 = ":status"
    const val TARGET_METHOD_UTF8 = ":method"
    const val TARGET_PATH_UTF8 = ":path"
    const val TARGET_SCHEME_UTF8 = ":scheme"
    const val TARGET_AUTHORITY_UTF8 = ":authority"

          override fun encode(
            writer: DerWriter,
            value: String,
          ) = writer.writeObjectIdentifier(value)
        },
    )

  val UTF8_STRING =
    BasicDerAdapter(
      name = "UTF8",
      tagClass = DerHeader.TAG_CLASS_UNIVERSAL,
      tag = 12L,
      codec =
        object : BasicDerAdapter.Codec<String> {

  return millis.toInt()
}

internal fun List<Header>.toHeaders(): Headers {
  val builder = Headers.Builder()
  for ((name, value) in this) {
    builder.addLenient(name.utf8(), value.utf8())
  }
  return builder.build()
}

internal fun Headers.toHeaderList(): List<Header> =
  (0 until size).map {
    Header(name(it), value(it))
  }

          rangesBuffer.writeByte(range.b3)
        }
        is MappedRange.External -> {
          // Write the mapping.
          val mappingOffset: Int
          val mappedTo = range.mappedTo.utf8()
          val mappingIndex = mappingsBuffer.indexOf(mappedTo)
          if (mappingIndex == -1) {
            mappingOffset = mappingsBuffer.length
            mappingsBuffer.append(mappedTo)
          } else {

      }
    },
    PERCENT {
      override fun encode(codePoint: Int): String {
        val utf8 = IDENTITY.encode(codePoint).encodeUtf8()
        val percentEncoded = Buffer()
        for (i in 0 until utf8.size) {
          percentEncoded.writeUtf8("%")
            .writeUtf8(ByteString.of(utf8[i]).hex().uppercase())
        }
        return percentEncoded.readUtf8()
      }
    },

  private val attributeTypeAndValue: BasicDerAdapter<AttributeTypeAndValue> =
    Adapters.sequence(
      "AttributeTypeAndValue",
      Adapters.OBJECT_IDENTIFIER,
      Adapters.any(
        String::class to Adapters.UTF8_STRING,
        Nothing::class to Adapters.PRINTABLE_STRING,
        AnyValue::class to Adapters.ANY_VALUE,
      ),
      decompose = {
        listOf(
          it.type,
          it.value,
        )

  }

  private fun checkEntry(
    entry: Header,
    name: String,
    value: String,
    size: Int,
  ) {
    assertThat(entry.name.utf8()).isEqualTo(name)
    assertThat(entry.value.utf8()).isEqualTo(value)
    assertThat(entry.hpackSize).isEqualTo(size)
  }

  private fun assertBytes(vararg bytes: Int) {
    val expected = intArrayToByteArray(bytes)

  integrity sha512-m7a0FhE67DQXgouf1tbN5XQcdWoNgaAuoULHIfGFIEVKA6tu/edls6XnIlkmS6FrXAquJRPni3ZZKjw6FSPjPQ==
  dependencies:
    "@xtuc/long" "4.2.2"

"@webassemblyjs/utf8@1.11.6":
  version "1.11.6"
  resolved "https://registry.yarnpkg.com/@webassemblyjs/utf8/-/utf8-1.11.6.tgz#90f8bc34c561595fe156603be7253cdbcd0fab5a"
  integrity sha512-vtXf2wTQ3+up9Zsg8sa2yWiQpzSsMyXj0qViVP6xKGCUT8p8YJ6HqI7l5eCnWx1T/FYdsv07HQs2wTFbbof/RA==

      if (logger.isLoggable(FINE)) logger.fine(format("<< CONNECTION ${connectionPreface.hex()}"))
      if (CONNECTION_PREFACE != connectionPreface) {
        throw IOException("Expected a connection header but was ${connectionPreface.utf8()}")
      }
    }
  }

  @Throws(IOException::class)
  fun nextFrame(
    requireSettings: Boolean,
    handler: Handler,
  ): Boolean {
    try {
      source.require(9) // Frame header size.