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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, sequtils, tables
import polyfill, lzssnode, lzsschain
suite "lzsschain":
proc chain(): LzssChain =
let chainArray = [
lzssCharacter(0), lzssCharacter(1), lzssCharacter(2),
lzssCharacter(3), lzssCharacter(4), lzssCharacter(5),
lzssReference(4, 6), lzssCharacter(0), lzssCharacter(1),
lzssReference(3, 8), lzssCharacter(5),
lzssReference(3, 3), lzssCharacter(5)]
var chain = lzssChain()
for node in chainArray: chain.append(node)
result = chain
test "decode":
check chain().decode() == @[0'u8, 1, 2, 3, 4, 5, 0, 1, 2, 3, 0, 1, 4, 5, 0, 5, 5, 0, 5, 5]
test "stats":
let stats = chain().stats()
check stats.characters == newCountTable(concat(
repeat(0'u8, 2), repeat(1'u8, 2), repeat(2'u8, 1), repeat(3'u8, 1), repeat(4'u8, 1), repeat(5'u8, 3)))
check stats.lengths == newCountTable(concat(
repeat(3, 2), repeat(4, 1)))
check stats.positions == newCountTable(concat(
repeat(3, 1), repeat(6, 1), repeat(8, 1)))
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