db9104a366
Change-Id: I70df74d005c7fca14b1bcb70f4870023bd3af4a1 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/159668 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <sbergman@redhat.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 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include <tools/zcodec.hxx>
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#include <tools/stream.hxx>
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#include <rtl/crc.h>
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#include <cppunit/TestAssert.h>
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#include <cppunit/TestFixture.h>
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#include <cppunit/extensions/HelperMacros.h>
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#include <cppunit/plugin/TestPlugIn.h>
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namespace
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{
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// Sample text for compression
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constexpr const char* DUMMY_TEXT
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= "Lorem ipsum dolor sit amet, consectetur adipiscing elit,\n"
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"sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\n"
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"Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea "
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"commodo consequat.\n";
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constexpr auto DUMMY_SIZE = std::char_traits<char>::length(DUMMY_TEXT);
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class ZCodecTest : public CppUnit::TestFixture
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{
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private:
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void testGzCompressDecompress();
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void testMakeDummyFile();
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void testZlibCompressDecompress();
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CPPUNIT_TEST_SUITE(ZCodecTest);
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CPPUNIT_TEST(testMakeDummyFile);
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CPPUNIT_TEST(testGzCompressDecompress);
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CPPUNIT_TEST(testZlibCompressDecompress);
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CPPUNIT_TEST_SUITE_END();
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};
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// Creates a stream from DUMMY_TEXT to compress and decompress
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std::unique_ptr<SvMemoryStream> makeDummyFile()
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{
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SvMemoryStream* pRet = new SvMemoryStream();
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pRet->WriteBytes(DUMMY_TEXT, DUMMY_SIZE);
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return std::unique_ptr<SvMemoryStream>(pRet);
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}
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// Test that the stream generated from makeDummyFile is valid
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void ZCodecTest::testMakeDummyFile()
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{
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auto pStream = makeDummyFile();
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// Check for null
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CPPUNIT_ASSERT_MESSAGE("pStream is null", pStream);
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decltype(DUMMY_SIZE) size = pStream->GetSize();
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// Check size
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CPPUNIT_ASSERT_EQUAL(DUMMY_SIZE, size);
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}
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// Test that ZCodec::Compress and ZCodec::Decompress work for gzlib = true
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// Compares the CRC32 checksum of the initial stream and the compressed->decompressed stream
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void ZCodecTest::testGzCompressDecompress()
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{
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auto pInitialStream = makeDummyFile();
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SvMemoryStream pCompressedStream;
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SvMemoryStream pDecompressedStream;
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auto nInitialStreamCRC32 = rtl_crc32(0, pInitialStream->GetData(), pInitialStream->GetSize());
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ZCodec aCodec;
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aCodec.BeginCompression(ZCODEC_DEFAULT_COMPRESSION, true);
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// Set compression metadata for compressing a GZ file
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aCodec.SetCompressionMetadata("dummy.txt"_ostr, 0, nInitialStreamCRC32);
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aCodec.Compress(*pInitialStream, pCompressedStream);
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auto nCompressedSize
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= aCodec.EndCompression(); // returns compressed size or -1 if compression failed
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// Check that the compression succeeded
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CPPUNIT_ASSERT_GREATER(static_cast<tools::Long>(0), nCompressedSize);
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// No need to Seek(0) here because ZCodec::InitDecompress does that already for gz
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aCodec.BeginCompression(ZCODEC_DEFAULT_COMPRESSION, true);
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aCodec.Decompress(pCompressedStream, pDecompressedStream);
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auto nDecompressedSize
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= aCodec.EndCompression(); // returns decompressed size or -1 if decompression failed
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// Check that the decompressed text size is equal to the original
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CPPUNIT_ASSERT_EQUAL(static_cast<tools::Long>(DUMMY_SIZE), nDecompressedSize);
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auto nCompressedDecompressedStreamCRC32
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= rtl_crc32(0, pDecompressedStream.GetData(), pDecompressedStream.GetSize());
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// Check that the initial and decompressed CRC32 checksums are the same -> gz (de)compression works
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CPPUNIT_ASSERT_EQUAL(nInitialStreamCRC32, nCompressedDecompressedStreamCRC32);
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}
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// Test that ZCodec::Compress and ZCodec::Decompress work for gzlib = false
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// Compares the CRC32 checksum of the initial stream and the compressed->decompressed stream
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void ZCodecTest::testZlibCompressDecompress()
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{
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auto pInitialStream = makeDummyFile();
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SvMemoryStream pCompressedStream;
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SvMemoryStream pDecompressedStream;
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auto nInitialStreamCRC32 = rtl_crc32(0, pInitialStream->GetData(), pInitialStream->GetSize());
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ZCodec aCodec;
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aCodec.BeginCompression(ZCODEC_DEFAULT_COMPRESSION, false);
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aCodec.Compress(*pInitialStream, pCompressedStream);
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auto nCompressedSize
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= aCodec.EndCompression(); // returns compressed size or -1 if compression failed
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// Check that the compression succeeded
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CPPUNIT_ASSERT_GREATER(static_cast<tools::Long>(0), nCompressedSize);
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pCompressedStream.Seek(0);
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aCodec.BeginCompression(ZCODEC_DEFAULT_COMPRESSION, false);
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aCodec.Decompress(pCompressedStream, pDecompressedStream);
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auto nDecompressedSize
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= aCodec.EndCompression(); // returns decompressed size or -1 if decompression failed
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// Check that the decompressed text size is equal to the original
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CPPUNIT_ASSERT_EQUAL(static_cast<tools::Long>(DUMMY_SIZE), nDecompressedSize);
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auto nCompressedDecompressedStreamCRC32
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= rtl_crc32(0, pDecompressedStream.GetData(), pDecompressedStream.GetSize());
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// Check that the initial and decompressed CRC32 checksums are the same -> zlib (de)compression works
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CPPUNIT_ASSERT_EQUAL(nInitialStreamCRC32, nCompressedDecompressedStreamCRC32);
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}
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} // namespace
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CPPUNIT_TEST_SUITE_REGISTRATION(ZCodecTest);
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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