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Tests: Add an LZMA roundtrip compression test

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Tim Schumacher 2023-05-03 18:36:53 +02:00 committed by Andreas Kling
parent 85a54cc796
commit e8067ac2ee
Notes: sideshowbarker 2024-07-17 04:41:05 +09:00 
Author: https://github.com/timschumi
Commit: https://github.com/SerenityOS/serenity/commit/e8067ac2ee
Pull-request: https://github.com/SerenityOS/serenity/pull/18769
1 changed files with 44 additions and 0 deletions
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44
Tests/LibCompress/TestLzma.cpp
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@ -31,6 +31,50 @@ TEST_CASE(repetition_length_beyond_distance)
EXPECT_EQ("ABABABA"sv.bytes(), buffer.span());
}
TEST_CASE(compress_decompress_roundtrip_with_known_size)
{
auto const uncompressed = "Well hello friends, this is a simple text file :)"sv.bytes();
auto stream = MUST(try_make<AllocatingMemoryStream>());
Compress::LzmaCompressorOptions const compressor_options {
.literal_context_bits = 3,
.literal_position_bits = 0,
.position_bits = 2,
.dictionary_size = 4 * KiB,
.uncompressed_size = uncompressed.size(),
};
auto compressor = TRY_OR_FAIL(Compress::LzmaCompressor::create_container(MaybeOwned<Stream> { *stream }, compressor_options));
TRY_OR_FAIL(compressor->write_until_depleted(uncompressed));
auto decompressor = TRY_OR_FAIL(Compress::LzmaDecompressor::create_from_container(MaybeOwned<Stream> { *stream }));
auto result = TRY_OR_FAIL(decompressor->read_until_eof());
EXPECT_EQ(uncompressed, result.span());
}
TEST_CASE(compress_decompress_roundtrip_with_unknown_size)
{
auto const uncompressed = "Well hello friends, this is a simple text file :)"sv.bytes();
auto stream = MUST(try_make<AllocatingMemoryStream>());
Compress::LzmaCompressorOptions const compressor_options {
.literal_context_bits = 3,
.literal_position_bits = 0,
.position_bits = 2,
.dictionary_size = 4 * KiB,
};
auto compressor = TRY_OR_FAIL(Compress::LzmaCompressor::create_container(MaybeOwned<Stream> { *stream }, compressor_options));
TRY_OR_FAIL(compressor->write_until_depleted(uncompressed));
TRY_OR_FAIL(compressor->flush());
auto decompressor = TRY_OR_FAIL(Compress::LzmaDecompressor::create_from_container(MaybeOwned<Stream> { *stream }));
auto result = TRY_OR_FAIL(decompressor->read_until_eof());
EXPECT_EQ(uncompressed, result.span());
}
// The following tests are based on test files from the LZMA specification, which has been placed in the public domain.
// LZMA Specification Draft (2015): https://www.7-zip.org/a/lzma-specification.7z