de22386cec
Add unit tests that check compressing->decompressing a file should result in the same file. This is done by comparing the CRC32 before and after. The same tests also implicitly test that compression/decompression works by checking the return value of ZCodec::EndCompression. Cases added for both mbGzLib=true/false. Change-Id: I5516760eba5f233c20331cef83fd0b1a1603373f Reviewed-on: https://gerrit.libreoffice.org/c/core/+/135233 Tested-by: Jenkins Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
123 lines
5.3 KiB
C++
123 lines
5.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
|
|
/*
|
|
* This file is part of the LibreOffice project.
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*/
|
|
|
|
#include <tools/zcodec.hxx>
|
|
#include <tools/stream.hxx>
|
|
#include <rtl/crc.h>
|
|
#include <cppunit/TestAssert.h>
|
|
#include <cppunit/TestFixture.h>
|
|
#include <cppunit/extensions/HelperMacros.h>
|
|
#include <cppunit/plugin/TestPlugIn.h>
|
|
|
|
namespace
|
|
{
|
|
// Sample text for compression
|
|
constexpr const char* DUMMY_TEXT
|
|
= "Lorem ipsum dolor sit amet, consectetur adipiscing elit,\n"
|
|
"sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\n"
|
|
"Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea "
|
|
"commodo consequat.\n";
|
|
constexpr auto DUMMY_SIZE = std::char_traits<char>::length(DUMMY_TEXT);
|
|
|
|
class ZCodecTest : public CppUnit::TestFixture
|
|
{
|
|
private:
|
|
void testGzCompressDecompress();
|
|
void testMakeDummyFile();
|
|
void testZlibCompressDecompress();
|
|
|
|
CPPUNIT_TEST_SUITE(ZCodecTest);
|
|
CPPUNIT_TEST(testMakeDummyFile);
|
|
CPPUNIT_TEST(testGzCompressDecompress);
|
|
CPPUNIT_TEST(testZlibCompressDecompress);
|
|
CPPUNIT_TEST_SUITE_END();
|
|
};
|
|
|
|
// Creates a stream from DUMMY_TEXT to compress and decompress
|
|
std::unique_ptr<SvMemoryStream> makeDummyFile()
|
|
{
|
|
SvMemoryStream* pRet = new SvMemoryStream();
|
|
pRet->WriteBytes(DUMMY_TEXT, DUMMY_SIZE);
|
|
return std::unique_ptr<SvMemoryStream>(pRet);
|
|
}
|
|
|
|
// Test that the stream generated from makeDummyFile is valid
|
|
void ZCodecTest::testMakeDummyFile()
|
|
{
|
|
auto pStream = makeDummyFile();
|
|
// Check for null
|
|
CPPUNIT_ASSERT_MESSAGE("pStream is null", pStream);
|
|
decltype(DUMMY_SIZE) size = pStream->GetSize();
|
|
// Check size
|
|
CPPUNIT_ASSERT_EQUAL(DUMMY_SIZE, size);
|
|
}
|
|
|
|
// Test that ZCodec::Compress and ZCodec::Decompress work for gzlib = true
|
|
// Compares the CRC32 checksum of the initial stream and the compressed->decompressed stream
|
|
void ZCodecTest::testGzCompressDecompress()
|
|
{
|
|
auto pInitialStream = makeDummyFile();
|
|
SvMemoryStream pCompressedStream;
|
|
SvMemoryStream pDecompressedStream;
|
|
auto nInitialStreamCRC32 = rtl_crc32(0, pInitialStream->GetData(), pInitialStream->GetSize());
|
|
ZCodec aCodec;
|
|
aCodec.BeginCompression(ZCODEC_DEFAULT_COMPRESSION, true);
|
|
// Set compression metadata for compressing a GZ file
|
|
aCodec.SetCompressionMetadata("dummy.txt", 0, nInitialStreamCRC32);
|
|
aCodec.Compress(*pInitialStream, pCompressedStream);
|
|
auto nCompressedSize
|
|
= aCodec.EndCompression(); // returns compressed size or -1 if compression failed
|
|
// Check that the compression succeeded
|
|
CPPUNIT_ASSERT_GREATER(static_cast<tools::Long>(0), nCompressedSize);
|
|
// No need to Seek(0) here because ZCodec::InitDecompress does that already for gz
|
|
aCodec.BeginCompression(ZCODEC_DEFAULT_COMPRESSION, true);
|
|
aCodec.Decompress(pCompressedStream, pDecompressedStream);
|
|
auto nDecompressedSize
|
|
= aCodec.EndCompression(); // returns decompressed size or -1 if decompression failed
|
|
// Check that the decompressed text size is equal to the original
|
|
CPPUNIT_ASSERT_EQUAL(static_cast<tools::Long>(DUMMY_SIZE), nDecompressedSize);
|
|
auto nCompressedDecompressedStreamCRC32
|
|
= rtl_crc32(0, pDecompressedStream.GetData(), pDecompressedStream.GetSize());
|
|
// Check that the initial and decompressed CRC32 checksums are the same -> gz (de)compression works
|
|
CPPUNIT_ASSERT_EQUAL(nInitialStreamCRC32, nCompressedDecompressedStreamCRC32);
|
|
}
|
|
|
|
// Test that ZCodec::Compress and ZCodec::Decompress work for gzlib = false
|
|
// Compares the CRC32 checksum of the initial stream and the compressed->decompressed stream
|
|
void ZCodecTest::testZlibCompressDecompress()
|
|
{
|
|
auto pInitialStream = makeDummyFile();
|
|
SvMemoryStream pCompressedStream;
|
|
SvMemoryStream pDecompressedStream;
|
|
auto nInitialStreamCRC32 = rtl_crc32(0, pInitialStream->GetData(), pInitialStream->GetSize());
|
|
ZCodec aCodec;
|
|
aCodec.BeginCompression(ZCODEC_DEFAULT_COMPRESSION, false);
|
|
aCodec.Compress(*pInitialStream, pCompressedStream);
|
|
auto nCompressedSize
|
|
= aCodec.EndCompression(); // returns compressed size or -1 if compression failed
|
|
// Check that the compression succeeded
|
|
CPPUNIT_ASSERT_GREATER(static_cast<tools::Long>(0), nCompressedSize);
|
|
pCompressedStream.Seek(0);
|
|
aCodec.BeginCompression(ZCODEC_DEFAULT_COMPRESSION, false);
|
|
aCodec.Decompress(pCompressedStream, pDecompressedStream);
|
|
auto nDecompressedSize
|
|
= aCodec.EndCompression(); // returns decompressed size or -1 if decompression failed
|
|
// Check that the decompressed text size is equal to the original
|
|
CPPUNIT_ASSERT_EQUAL(static_cast<tools::Long>(DUMMY_SIZE), nDecompressedSize);
|
|
auto nCompressedDecompressedStreamCRC32
|
|
= rtl_crc32(0, pDecompressedStream.GetData(), pDecompressedStream.GetSize());
|
|
// Check that the initial and decompressed CRC32 checksums are the same -> zlib (de)compression works
|
|
CPPUNIT_ASSERT_EQUAL(nInitialStreamCRC32, nCompressedDecompressedStreamCRC32);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
CPPUNIT_TEST_SUITE_REGISTRATION(ZCodecTest);
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
|