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34 lines
1.6 KiB
C++
34 lines
1.6 KiB
C++
/*
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* Copyright (c) 2024, Lucas Chollet <lucas.chollet@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <AK/Array.h>
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#include <LibCompress/Lzw.h>
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namespace {
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ErrorOr<bool> test_roundtrip_string(StringView input)
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{
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auto const compressed = TRY(Compress::LzwCompressor::compress_all(input.bytes(), 8));
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auto const roundtrip = TRY(Compress::LzwDecompressor<LittleEndianInputBitStream>::decompress_all(compressed, 8));
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return roundtrip == input.bytes();
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}
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}
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TEST_CASE(roundtrip_lzw_little_endian_short)
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{
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EXPECT(TRY_OR_FAIL(test_roundtrip_string("WeWellll"sv)));
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}
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TEST_CASE(roundtrip_lzw_little_endian_long)
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{
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// LZW changes the code size after ~512 new symbols, this test case is long enough to trigger that.
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constexpr auto input = "WellWellWellWellaqwertyuiop[]sdfghjkl;'zxcvbnm,./uipnaspchu9epqrjepncdp9ruew-r8thvnufsipdonvjcx zvlrz[iu0q-348urfjsd;fjmvxc.nnnmvcxzvmc c,m;l'/,l4532[5i904tmorew;lgkrmopds['kg,l;'s,gWellWellWellWellaqwertyuiop[]sdfghjkl;'zxcvbnm,./uipnaspchu9epqrjepncdp9ruew-r8thvnufsipdonvjcx zvlrz[iu0q-348urfjsd;fjmvxc.nnnmvcxzvmc c,m;l'/,l4532[5i904tmorew;lgkrmopds['kg,l;'s,gWellWellWellWellaqwertyuiop[]sdfghjkl;'zxcvbnm,./uipnaspchu9epqrjepncdp9ruew-r8thvnufsipdonvjcx zvlrz[iu0q-348urfjsd;fjmvxc.nnnmvcxzvmc c,m;l'/,l4532[5i904tmorew;lgkrmopds['kg,l;'s,gWellWellWellWellaqwertyuiop[]sdfghjkl;'zxcvbnm,./uipnaspchu9epqrjepncdp9ruew-r8thvnufsipdonvjcx zvlrz[iu0q-348urfjsd;fjmvxc.nnnmvcxzvmc c,m;l'/,l4532[5i904tmorew;lgkrmopds['kg,l;'s,g"sv;
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EXPECT(TRY_OR_FAIL(test_roundtrip_string(input)));
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}
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