}.also { expected ->
      assertThat(expected.message).isEqualTo("PROTOCOL_ERROR: TYPE_DATA streamId == 0")
    }
  }

  /** We do not send SETTINGS_COMPRESS_DATA = 1, nor want to. Let's make sure we error.  */
  @Test fun compressedDataFrameWhenSettingDisabled() {
    val expectedData = ByteArray(Http2.INITIAL_MAX_FRAME_SIZE)
    Arrays.fill(expectedData, 2.toByte())

    val inFinished = flags and FLAG_END_STREAM != 0
    val gzipped = flags and FLAG_COMPRESSED != 0
    if (gzipped) {
      throw IOException("PROTOCOL_ERROR: FLAG_COMPRESSED without SETTINGS_COMPRESS_DATA")
    }

    val padding = if (flags and FLAG_PADDED != 0) source.readByte() and 0xff else 0
    val dataLength = lengthWithoutPadding(length, flags, padding)