1 files changed, 123 insertions, 0 deletions
diff --git a/tools/qa/cppunit/test_zcodec.cxx b/tools/qa/cppunit/test_zcodec.cxx
new file mode 100644
index 0000000000..935a234d4f
--- /dev/null
+++ b/tools/qa/cppunit/test_zcodec.cxx
@@ -0,0 +1,123 @@
+/* -*- 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"_ostr, 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: */