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Instead of checking the header in ZlibDecompressor::create(), we now check it in read_some() when it is called for the first time. This resolves a FIXME in the new DecompressionStream implementation.
102 lines
4.7 KiB
C++
102 lines
4.7 KiB
C++
/*
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* Copyright (c) 2020-2021, the SerenityOS developers.
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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 <AK/MemoryStream.h>
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#include <LibCompress/Zlib.h>
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TEST_CASE(zlib_decompress_simple)
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{
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Array<u8, 40> const compressed {
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0x78, 0x01, 0x01, 0x1D, 0x00, 0xE2, 0xFF, 0x54, 0x68, 0x69, 0x73, 0x20,
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0x69, 0x73, 0x20, 0x61, 0x20, 0x73, 0x69, 0x6D, 0x70, 0x6C, 0x65, 0x20,
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0x74, 0x65, 0x78, 0x74, 0x20, 0x66, 0x69, 0x6C, 0x65, 0x20, 0x3A, 0x29,
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0x99, 0x5E, 0x09, 0xE8
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};
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u8 const uncompressed[] = "This is a simple text file :)";
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auto stream = make<FixedMemoryStream>(compressed);
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auto decompressor = TRY_OR_FAIL(Compress::ZlibDecompressor::create(move(stream)));
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auto decompressed = TRY_OR_FAIL(decompressor->read_until_eof());
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EXPECT(decompressed.bytes() == (ReadonlyBytes { uncompressed, sizeof(uncompressed) - 1 }));
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}
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TEST_CASE(zlib_decompress_stream)
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{
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Array<u8, 40> const compressed {
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0x78, 0x01, 0x01, 0x1D, 0x00, 0xE2, 0xFF, 0x54, 0x68, 0x69, 0x73, 0x20,
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0x69, 0x73, 0x20, 0x61, 0x20, 0x73, 0x69, 0x6D, 0x70, 0x6C, 0x65, 0x20,
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0x74, 0x65, 0x78, 0x74, 0x20, 0x66, 0x69, 0x6C, 0x65, 0x20, 0x3A, 0x29,
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0x99, 0x5E, 0x09, 0xE8
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};
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u8 const uncompressed[] = "This is a simple text file :)";
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auto stream = make<AllocatingMemoryStream>();
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auto input = MaybeOwned<Stream> { *stream };
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auto decompressor = TRY_OR_FAIL(Compress::ZlibDecompressor::create(move(input)));
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TRY_OR_FAIL(stream->write_until_depleted(compressed));
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auto decompressed = TRY_OR_FAIL(decompressor->read_until_eof());
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EXPECT(decompressed.bytes() == (ReadonlyBytes { uncompressed, sizeof(uncompressed) - 1 }));
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}
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TEST_CASE(zlib_compress_simple)
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{
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// Note: This is just the output of our compression function from an arbitrary point in time.
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// This test is intended to ensure that the decompression doesn't change unintentionally,
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// it does not make any guarantees for correctness.
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Array<u8, 37> const compressed {
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0x78, 0x9C, 0x0B, 0xC9, 0xC8, 0x2C, 0x56, 0xC8, 0x2C, 0x56, 0x48, 0x54,
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0x28, 0xCE, 0xCC, 0x2D, 0xC8, 0x49, 0x55, 0x28, 0x49, 0xAD, 0x28, 0x51,
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0x48, 0xCB, 0xCC, 0x49, 0x55, 0xB0, 0xD2, 0x04, 0x00, 0x99, 0x5E, 0x09,
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0xE8
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};
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u8 const uncompressed[] = "This is a simple text file :)";
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auto const freshly_pressed = Compress::ZlibCompressor::compress_all({ uncompressed, sizeof(uncompressed) - 1 });
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EXPECT(freshly_pressed.value().bytes() == compressed.span());
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}
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TEST_CASE(zlib_decompress_with_missing_end_bits)
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{
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// This test case has been extracted from compressed PNG data of `/res/icons/16x16/app-masterword.png`.
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// The decompression results have been confirmed using the `zlib-flate` tool.
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// Note: It is unconfirmed whether there are actually bits missing.
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// However, our decompressor implementation ends up in a weird state nonetheless.
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Array<u8, 72> const compressed {
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0x08, 0xD7, 0x63, 0x30, 0x86, 0x00, 0x01, 0x06, 0x23, 0x25, 0x30, 0x00,
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0x32, 0x42, 0x95, 0x54, 0x83, 0xD0, 0x18, 0x41, 0xA1, 0x50, 0x46, 0x28,
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0x8C, 0xA1, 0x8A, 0xA1, 0x46, 0xC5, 0x35, 0x48, 0xC9, 0x05, 0x99, 0xA1,
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0xA4, 0xE2, 0x02, 0x44, 0x60, 0x93, 0x5D, 0x54, 0x54, 0x9C, 0x20, 0x0C,
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0x17, 0x17, 0x08, 0x43, 0xC5, 0xC9, 0x05, 0xA8, 0x4B, 0x50, 0x50, 0x50,
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0xC4, 0xD1, 0x45, 0x50, 0x80, 0x01, 0x06, 0x00, 0xB6, 0x1F, 0x15, 0xEF
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};
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Array<u8, 144> const uncompressed {
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0x00, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x10, 0x00, 0x32, 0x22,
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0x22, 0x22, 0x22, 0x22, 0x22, 0x10, 0x00, 0x32, 0x55, 0x22, 0x25, 0x52,
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0x22, 0x22, 0x10, 0x00, 0x32, 0x55, 0x22, 0x25, 0x52, 0x22, 0x22, 0x10,
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0x00, 0x32, 0x55, 0x52, 0x55, 0x52, 0x22, 0x22, 0x10, 0x00, 0x32, 0x55,
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0x55, 0x55, 0x52, 0x22, 0x22, 0x10, 0x00, 0x32, 0x55, 0x25, 0x25, 0x52,
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0x22, 0x22, 0x10, 0x00, 0x32, 0x55, 0x22, 0x25, 0x52, 0x22, 0x22, 0x10,
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0x00, 0x32, 0x55, 0x24, 0x45, 0x52, 0x22, 0x44, 0x10, 0x00, 0x32, 0x55,
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0x24, 0x45, 0x52, 0x22, 0x44, 0x10, 0x00, 0x32, 0x22, 0x24, 0x44, 0x22,
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0x24, 0x44, 0x10, 0x00, 0x32, 0x22, 0x22, 0x44, 0x24, 0x24, 0x42, 0x10,
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0x00, 0x32, 0x22, 0x22, 0x44, 0x44, 0x44, 0x42, 0x10, 0x00, 0x32, 0x22,
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0x22, 0x24, 0x42, 0x44, 0x22, 0x10, 0x00, 0x11, 0x11, 0x11, 0x14, 0x41,
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0x44, 0x11, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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auto stream = make<FixedMemoryStream>(compressed);
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auto decompressor = TRY_OR_FAIL(Compress::ZlibDecompressor::create(move(stream)));
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auto decompressed = TRY_OR_FAIL(decompressor->read_until_eof());
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EXPECT_EQ(decompressed.span(), uncompressed.span());
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}
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