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# gzip-like LZSS compressor
# Copyright (C) 2018 Pacien TRAN-GIRARD
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import unittest, streams
import bitio/bitreader, bitio/bitwriter
import huffman/huffmantree, huffman/huffmandecoder
suite "huffmandecoder":
let tree = huffmanBranch(
huffmanLeaf(1'u),
huffmanBranch(
huffmanLeaf(2'u),
huffmanLeaf(3'u)))
test "decode":
let stream = newStringStream()
defer: stream.close()
let bitWriter = stream.bitWriter()
bitWriter.writeBool(true) # 2
bitWriter.writeBool(false)
bitWriter.writeBool(false) # 1
bitWriter.writeBool(true) # 3
bitWriter.writeBool(true)
bitWriter.flush()
stream.setPosition(0)
let bitReader = stream.bitReader()
let decoder = tree.decoder()
check decoder.decode(bitReader) == 2'u
check decoder.decode(bitReader) == 1'u
check decoder.decode(bitReader) == 3'u
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