10D0-10F8
   10FB
   1100-1159
   115F-11A2
   11A8-11F9
   1200-1206
   1208-1246
   1248
   124A-124D
   1250-1256
   1258
   125A-125D
   1260-1286
   1288
   128A-128D
   1290-12AE
   12B0
   12B2-12B5
   12B8-12BE
   12C0
   12C2-12C5
   12C8-12CE
   12D0-12D6
   12D8-12EE
   12F0-130E
   1310
   1312-1315
   1318-131E
   1320-1346

          ) = writer.writeUtf8(value)
        },
    )

  /**
   * A timestamp like "191216030210Z" or "191215190210-0800" for 2019-12-15T19:02:10-08:00. The
   * cutoff of the 2-digit year is 1950-01-01T00:00:00Z.
   */
  val UTC_TIME =
    BasicDerAdapter(
      name = "UTC TIME",
      tagClass = DerHeader.TAG_CLASS_UNIVERSAL,
      tag = 23L,
      codec =

          else -> throw ProtocolException("expected time but was $peekHeader at $reader")
        }
      }

      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)

    assertFailsWith<ProtocolException> {
      clientReader.processNextFrame()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Control frame must be less than 125B.")
    }
  }

  @Test fun clientSimpleHello() {
    data.write("810548656c6c6f".decodeHex()) // Hello
    clientReader.processNextFrame()
    callback.assertTextMessage("Hello")
  }

1257          ; disallowed                             # NA   <reserved-1257>
1258          ; valid                                  # 3.0  ETHIOPIC SYLLABLE QHWA
1259          ; disallowed                             # NA   <reserved-1259>
125A..125D    ; valid                                  # 3.0  ETHIOPIC SYLLABLE QHWI..ETHIOPIC SYLLABLE QHWE