clientReader.processNextFrame()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Code must be in range [1000,5000): 5000")
    }
  }

  @Test fun closeReservedSetThrows() {
    data.write("880203ec".decodeHex()) // Close with code 1004
    data.write("880203ed".decodeHex()) // Close with code 1005
    data.write("880203ee".decodeHex()) // Close with code 1006