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#include "zlib.h"
#include <library/cpp/testing/unittest/registar.h>
#include "file.h"
#include <util/system/tempfile.h>
#include <util/random/entropy.h>
#define ZDATA "./zdata"
class TThrowingStream: public IOutputStream {
public:
TThrowingStream(int limit)
: Limit_(limit)
{
}
void DoWrite(const void*, size_t size) override {
if (Ignore) {
return;
}
Limit_ -= size;
if (Limit_ < 0) {
throw yexception() << "catch this";
}
}
void DoFinish() override {
if (Ignore) {
return;
}
if (Limit_ < 0) {
throw yexception() << "catch this";
}
}
void DoFlush() override {
if (Ignore) {
return;
}
if (Limit_ < 0) {
throw yexception() << "catch this";
}
}
bool Ignore = false;
private:
int Limit_;
};
Y_UNIT_TEST_SUITE(TZLibTest) {
static const TString DATA = "8s7d5vc6s5vc67sa4c65ascx6asd4xcv76adsfxv76s";
static const TString DATA2 = "cn8wk2bd9vb3vdfif83g1ks94bfiovtwv";
Y_UNIT_TEST(Compress) {
TUnbufferedFileOutput o(ZDATA);
TZLibCompress c(&o, ZLib::ZLib);
c.Write(DATA.data(), DATA.size());
c.Finish();
o.Finish();
}
Y_UNIT_TEST(Decompress) {
TTempFile tmpFile(ZDATA);
{
TUnbufferedFileInput i(ZDATA);
TZLibDecompress d(&i);
UNIT_ASSERT_EQUAL(d.ReadAll(), DATA);
}
}
Y_UNIT_TEST(Dictionary) {
static constexpr TStringBuf data = "<html><body></body></html>";
static constexpr TStringBuf dict = "</<html><body>";
for (auto type : {ZLib::Raw, ZLib::ZLib}) {
TStringStream compressed;
{
TZLibCompress compressor(TZLibCompress::TParams(&compressed).SetDict(dict).SetType(type));
compressor.Write(data);
}
TZLibDecompress decompressor(&compressed, type, ZLib::ZLIB_BUF_LEN, dict);
UNIT_ASSERT_STRINGS_EQUAL(decompressor.ReadAll(), data);
}
}
Y_UNIT_TEST(DecompressTwoStreams) {
// Check that Decompress(Compress(X) + Compress(Y)) == X + Y
TTempFile tmpFile(ZDATA);
{
TUnbufferedFileOutput o(ZDATA);
TZLibCompress c1(&o, ZLib::ZLib);
c1.Write(DATA.data(), DATA.size());
c1.Finish();
TZLibCompress c2(&o, ZLib::ZLib);
c2.Write(DATA2.data(), DATA2.size());
c2.Finish();
o.Finish();
}
{
TUnbufferedFileInput i(ZDATA);
TZLibDecompress d(&i);
UNIT_ASSERT_EQUAL(d.ReadAll(), DATA + DATA2);
}
}
Y_UNIT_TEST(CompressionExceptionSegfault) {
TVector<char> buf(512 * 1024);
EntropyPool().Load(buf.data(), buf.size());
TThrowingStream o(128 * 1024);
TZLibCompress c(&o, ZLib::GZip, 4, 1 << 15);
try {
c.Write(buf.data(), buf.size());
} catch (...) {
}
o.Ignore = true;
TVector<char>().swap(buf);
}
Y_UNIT_TEST(DecompressFirstOfTwoStreams) {
// Check that Decompress(Compress(X) + Compress(Y)) == X when single stream is allowed
TTempFile tmpFile(ZDATA);
{
TUnbufferedFileOutput o(ZDATA);
TZLibCompress c1(&o, ZLib::ZLib);
c1.Write(DATA.data(), DATA.size());
c1.Finish();
TZLibCompress c2(&o, ZLib::ZLib);
c2.Write(DATA2.data(), DATA2.size());
c2.Finish();
o.Finish();
}
{
TUnbufferedFileInput i(ZDATA);
TZLibDecompress d(&i);
d.SetAllowMultipleStreams(false);
UNIT_ASSERT_EQUAL(d.ReadAll(), DATA);
}
}
Y_UNIT_TEST(CompressFlush) {
TString data = "";
for (size_t i = 0; i < 32; ++i) {
TTempFile tmpFile(ZDATA);
TUnbufferedFileOutput output(ZDATA);
TZLibCompress compressor(&output, ZLib::ZLib);
compressor.Write(data.data(), data.size());
compressor.Flush();
{
TUnbufferedFileInput input(ZDATA);
TZLibDecompress decompressor(&input);
UNIT_ASSERT_EQUAL(decompressor.ReadAll(), data);
}
data += 'A' + i;
}
}
Y_UNIT_TEST(CompressEmptyFlush) {
TTempFile tmpFile(ZDATA);
TUnbufferedFileOutput output(ZDATA);
TZLibCompress compressor(&output, ZLib::ZLib);
TUnbufferedFileInput input(ZDATA);
compressor.Write(DATA.data(), DATA.size());
compressor.Flush();
{
TZLibDecompress decompressor(&input);
UNIT_ASSERT_EQUAL(decompressor.ReadAll(), DATA);
}
for (size_t i = 0; i < 10; ++i) {
compressor.Flush();
}
UNIT_ASSERT_EQUAL(input.ReadAll(), "");
}
Y_UNIT_TEST(CompressFlushSmallBuffer) {
for (size_t bufferSize = 16; bufferSize < 32; ++bufferSize) {
TString firstData = "";
for (size_t firstDataSize = 0; firstDataSize < 16; ++firstDataSize) {
TString secondData = "";
for (size_t secondDataSize = 0; secondDataSize < 16; ++secondDataSize) {
TTempFile tmpFile(ZDATA);
TUnbufferedFileOutput output(ZDATA);
TZLibCompress compressor(TZLibCompress::TParams(&output).SetType(ZLib::ZLib).SetBufLen(bufferSize));
TUnbufferedFileInput input(ZDATA);
TZLibDecompress decompressor(&input);
compressor.Write(firstData.data(), firstData.size());
compressor.Flush();
UNIT_ASSERT_EQUAL(decompressor.ReadAll(), firstData);
compressor.Write(secondData.data(), secondData.size());
compressor.Flush();
UNIT_ASSERT_EQUAL(decompressor.ReadAll(), secondData);
secondData += 'A' + secondDataSize;
}
firstData += 'A' + firstDataSize;
}
}
}
}
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