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test-compress: Add DEFLATE compression tests
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02569bec11
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sideshowbarker
2024-07-18 21:24:27 +09:00
Author: https://github.com/IdanHo Commit: https://github.com/SerenityOS/serenity/commit/02569bec118 Pull-request: https://github.com/SerenityOS/serenity/pull/5750 Issue: https://github.com/SerenityOS/serenity/issues/3989 Reviewed-by: https://github.com/alimpfard Reviewed-by: https://github.com/bcoles
@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2020, the SerenityOS developers.
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* Copyright (c) 2020-2021, the SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -28,9 +28,11 @@
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#include <AK/Array.h>
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#include <AK/MemoryStream.h>
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#include <AK/Random.h>
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#include <LibCompress/Deflate.h>
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#include <LibCompress/Gzip.h>
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#include <LibCompress/Zlib.h>
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#include <string.h>
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TEST_CASE(canonical_code_simple)
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{
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@ -131,6 +133,41 @@ TEST_CASE(deflate_decompress_zeroes)
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EXPECT(uncompressed == decompressed.value().bytes());
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}
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TEST_CASE(deflate_round_trip_store)
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{
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auto original = ByteBuffer::create_uninitialized(1024);
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fill_with_random(original.data(), 1024);
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auto compressed = Compress::DeflateCompressor::compress_all(original, Compress::DeflateCompressor::CompressionLevel::STORE);
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EXPECT(compressed.has_value());
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auto uncompressed = Compress::DeflateDecompressor::decompress_all(compressed.value());
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EXPECT(uncompressed.has_value());
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EXPECT(uncompressed.value() == original);
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}
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TEST_CASE(deflate_round_trip_compress)
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{
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auto original = ByteBuffer::create_uninitialized(2048);
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fill_with_random(original.data(), 1024);
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memset(original.offset_pointer(1024), 0, 1024); // we fill the second half with 0s to make sure we test back references as well
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// Since the different levels just change how much time is spent looking for better matches, just use fast here to reduce test time
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auto compressed = Compress::DeflateCompressor::compress_all(original, Compress::DeflateCompressor::CompressionLevel::FAST);
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EXPECT(compressed.has_value());
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auto uncompressed = Compress::DeflateDecompressor::decompress_all(compressed.value());
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EXPECT(uncompressed.has_value());
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EXPECT(uncompressed.value() == original);
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}
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TEST_CASE(deflate_round_trip_compress_large)
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{
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auto original = ByteBuffer::create_uninitialized(Compress::DeflateCompressor::block_size * 2); // Compress a buffer larger than the maximum block size to test the sliding window mechanism
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// Since the different levels just change how much time is spent looking for better matches, just use fast here to reduce test time
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auto compressed = Compress::DeflateCompressor::compress_all(original, Compress::DeflateCompressor::CompressionLevel::FAST);
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EXPECT(compressed.has_value());
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auto uncompressed = Compress::DeflateDecompressor::decompress_all(compressed.value());
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EXPECT(uncompressed.has_value());
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EXPECT(uncompressed.value() == original);
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}
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TEST_CASE(zlib_decompress_simple)
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{
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const Array<u8, 40> compressed {
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