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wxWidgets/tests/streams/zlibstream.cpp

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///////////////////////////////////////////////////////////////////////////////
// Name: tests/streams/zlibstream.cpp
// Purpose: Test wxZlibInputStream/wxZlibOutputStream
// Author: Hans Van Leemputten
// RCS-ID: $Id$
// Copyright: (c) 2004 Hans Van Leemputten
// Licence: wxWidgets licence
///////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx/wx.h".
// and "wx/cppunit.h"
#include "testprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
// for all others, include the necessary headers
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/zstream.h"
#include "wx/wfstream.h"
#include "wx/mstream.h"
#include "wx/txtstrm.h"
#include "bstream.h"
using std::string;
#define WXTEST_WITH_GZIP_CONDITION(testMethod) \
WXTEST_WITH_CONDITION( COMPOSE_TEST_NAME(zlibStream), wxZlibInputStream::CanHandleGZip() && wxZlibOutputStream::CanHandleGZip(), testMethod )
#define DATABUFFER_SIZE 1024
static const wxString FILENAME_GZ = _T("zlibtest.gz");
///////////////////////////////////////////////////////////////////////////////
// The test case
//
// Try to fully test wxZlibInputStream and wxZlibOutputStream
class zlibStream : public BaseStreamTestCase<wxZlibInputStream, wxZlibOutputStream>
{
public:
zlibStream();
virtual ~zlibStream();
CPPUNIT_TEST_SUITE(zlibStream);
// Base class stream tests the zlibstream supports.
CPPUNIT_TEST_FAIL(Input_GetSize);
CPPUNIT_TEST(Input_GetC);
CPPUNIT_TEST(Input_Read);
CPPUNIT_TEST(Input_Eof);
CPPUNIT_TEST(Input_LastRead);
CPPUNIT_TEST(Input_CanRead);
CPPUNIT_TEST_FAIL(Input_SeekI);
CPPUNIT_TEST(Input_TellI);
CPPUNIT_TEST(Input_Peek);
CPPUNIT_TEST(Input_Ungetch);
CPPUNIT_TEST(Output_PutC);
CPPUNIT_TEST(Output_Write);
CPPUNIT_TEST(Output_LastWrite);
CPPUNIT_TEST_FAIL(Output_SeekO);
CPPUNIT_TEST(Output_TellO);
// Other test specific for zlib stream test case.
CPPUNIT_TEST(TestStream_NoHeader_Default);
CPPUNIT_TEST(TestStream_NoHeader_NoComp);
CPPUNIT_TEST(TestStream_NoHeader_SpeedComp);
CPPUNIT_TEST(TestStream_NoHeader_BestComp);
CPPUNIT_TEST(TestStream_ZLib_Default);
CPPUNIT_TEST(TestStream_ZLib_NoComp);
CPPUNIT_TEST(TestStream_ZLib_SpeedComp);
CPPUNIT_TEST(TestStream_ZLib_BestComp);
WXTEST_WITH_GZIP_CONDITION(TestStream_GZip_Default);
WXTEST_WITH_GZIP_CONDITION(TestStream_GZip_NoComp);
WXTEST_WITH_GZIP_CONDITION(TestStream_GZip_SpeedComp);
WXTEST_WITH_GZIP_CONDITION(TestStream_GZip_BestComp);
WXTEST_WITH_GZIP_CONDITION(TestStream_ZLibGZip);
CPPUNIT_TEST(Decompress_BadData);
CPPUNIT_TEST(Decompress_wx251_zlib114_Data_NoHeader);
CPPUNIT_TEST(Decompress_wx251_zlib114_Data_ZLib);
WXTEST_WITH_GZIP_CONDITION(Decompress_gzip135Data);
CPPUNIT_TEST_SUITE_END();
protected:
// Test different stream construct settings.
void TestStream_NoHeader_Default();
void TestStream_NoHeader_NoComp();
void TestStream_NoHeader_SpeedComp();
void TestStream_NoHeader_BestComp();
void TestStream_ZLib_Default();
void TestStream_ZLib_NoComp();
void TestStream_ZLib_SpeedComp();
void TestStream_ZLib_BestComp();
void TestStream_GZip_Default();
void TestStream_GZip_NoComp();
void TestStream_GZip_SpeedComp();
void TestStream_GZip_BestComp();
void TestStream_ZLibGZip();
// Try to decompress bad data.
void Decompress_BadData();
// Decompress data that was compress by an external app.
// (like test wx 2.4.2, 2.5.1 and gzip data)
// Note: This test is limited in testing range!
void Decompress_wx251_zlib114_Data_NoHeader();
void Decompress_wx251_zlib114_Data_ZLib();
void Decompress_gzip135Data();
private:
const char *GetDataBuffer();
const unsigned char *GetCompressedData();
void doTestStreamData(int input_flag, int output_flag, int compress_level);
void doDecompress_ExternalData(const unsigned char *data, const char *value, size_t data_size, size_t value_size, int flag = wxZLIB_AUTO);
private:
// Implement base class functions.
virtual wxZlibInputStream *DoCreateInStream();
virtual wxZlibOutputStream *DoCreateOutStream();
virtual void DoDeleteInStream();
virtual void DoDeleteOutStream();
// Helper that can be used to create new wx compatibility tests...
// Otherwise not used by the tests.
void genExtTestData(wxTextOutputStream &out, const char *buf, int flag);
private:
char m_DataBuffer[DATABUFFER_SIZE];
size_t m_SizeCompressedData;
unsigned char *m_pCompressedData;
// Used by the base Creat[In|Out]Stream and Delete[In|Out]Stream.
wxMemoryInputStream *m_pTmpMemInStream;
wxMemoryOutputStream *m_pTmpMemOutStream;
};
zlibStream::zlibStream()
:m_SizeCompressedData(0),
m_pCompressedData(NULL),
m_pTmpMemInStream(NULL),
m_pTmpMemOutStream(NULL)
{
// Init the data buffer.
for (size_t i = 0; i < DATABUFFER_SIZE; i++)
m_DataBuffer[i] = (i % 0xFF);
// Set extra base config settings.
m_bSimpleTellITest = true;
m_bSimpleTellOTest = true;
/* Example code on how to produce test data...
{
wxFFileOutputStream fstream_out(_T("gentest.cpp"));
wxTextOutputStream out( fstream_out );
genExtTestData(out, "zlib data created with wxWidgets 2.5.x [March 27], wxZLIB_NO_HEADER, zlib 1.1.4", wxZLIB_NO_HEADER);
genExtTestData(out, "zlib data created with wxWidgets 2.5.x [March 27], wxZLIB_ZLIB, zlib 1.1.4", wxZLIB_ZLIB);
}
*/
}
zlibStream::~zlibStream()
{
delete[] m_pCompressedData;
delete m_pTmpMemInStream;
delete m_pTmpMemOutStream;
}
void zlibStream::TestStream_NoHeader_Default()
{
doTestStreamData(wxZLIB_NO_HEADER, wxZLIB_NO_HEADER, wxZ_DEFAULT_COMPRESSION);
}
void zlibStream::TestStream_NoHeader_NoComp()
{
doTestStreamData(wxZLIB_NO_HEADER, wxZLIB_NO_HEADER, wxZ_NO_COMPRESSION);
}
void zlibStream::TestStream_NoHeader_SpeedComp()
{
doTestStreamData(wxZLIB_NO_HEADER, wxZLIB_NO_HEADER, wxZ_BEST_SPEED);
}
void zlibStream::TestStream_NoHeader_BestComp()
{
doTestStreamData(wxZLIB_NO_HEADER, wxZLIB_NO_HEADER, wxZ_BEST_COMPRESSION);
}
void zlibStream::TestStream_ZLib_Default()
{
doTestStreamData(wxZLIB_ZLIB, wxZLIB_ZLIB, wxZ_DEFAULT_COMPRESSION);
}
void zlibStream::TestStream_ZLib_NoComp()
{
doTestStreamData(wxZLIB_ZLIB, wxZLIB_ZLIB, wxZ_NO_COMPRESSION);
}
void zlibStream::TestStream_ZLib_SpeedComp()
{
doTestStreamData(wxZLIB_ZLIB, wxZLIB_ZLIB, wxZ_BEST_SPEED);
}
void zlibStream::TestStream_ZLib_BestComp()
{
doTestStreamData(wxZLIB_ZLIB, wxZLIB_ZLIB, wxZ_BEST_COMPRESSION);
}
void zlibStream::TestStream_GZip_Default()
{
doTestStreamData(wxZLIB_GZIP, wxZLIB_GZIP, wxZ_DEFAULT_COMPRESSION);
}
void zlibStream::TestStream_GZip_NoComp()
{
doTestStreamData(wxZLIB_GZIP, wxZLIB_GZIP, wxZ_NO_COMPRESSION);
}
void zlibStream::TestStream_GZip_SpeedComp()
{
doTestStreamData(wxZLIB_GZIP, wxZLIB_GZIP, wxZ_BEST_SPEED);
}
void zlibStream::TestStream_GZip_BestComp()
{
doTestStreamData(wxZLIB_GZIP, wxZLIB_GZIP, wxZ_BEST_COMPRESSION);
}
void zlibStream::TestStream_ZLibGZip()
{
// Only use default compression level, as this test is
// for testing if the streams can determine the stream type info them self...
doTestStreamData(wxZLIB_AUTO, wxZLIB_ZLIB, wxZ_DEFAULT_COMPRESSION);
doTestStreamData(wxZLIB_AUTO, wxZLIB_GZIP, wxZ_DEFAULT_COMPRESSION);
}
void zlibStream::Decompress_BadData()
{
// Setup the bad data stream and the zlib stream.
wxMemoryInputStream memstream_in(GetDataBuffer(), DATABUFFER_SIZE);
CPPUNIT_ASSERT(memstream_in.IsOk());
wxZlibInputStream zstream_in(memstream_in);
CPPUNIT_ASSERT(zstream_in.IsOk()); // We did not yet read from the stream
// so it should still be OK.
// Try to force the stream to go to bad status.
CPPUNIT_ASSERT(!zstream_in.Eof());
if (zstream_in.IsOk())
zstream_in.GetC();
// Because of the bad data in the input stream the zlib
// stream should be marked as NOT OK.
CPPUNIT_ASSERT(!zstream_in.IsOk());
}
void zlibStream::Decompress_wx251_zlib114_Data_NoHeader()
{
const unsigned char data[] = {171,202,201,76,82,72,73,44,73,84,72,46,74,77,44,73,77,81,40,207,44,201,80,40,175,8,207,76,73,79,45,41,86,48,210,51,213,171,80,136,246,77,44,74,206,80,48,50,143,213,1,202,69,249,120,58,197,251,249,199,123,184,58,186,184,6,233,40,84,129,12,49,212,51,212,51,1,0,32};
const char *value = "zlib data created with wxWidgets 2.5.x [March 27], wxZLIB_NO_HEADER, zlib 1.1.4";
const size_t data_size = sizeof(data);
const size_t value_size = strlen(value);
// We need to specify wxZLIB_NO_HEADER because wxZLIB_AUTO can't find it his self.
doDecompress_ExternalData(data, value, data_size, value_size, wxZLIB_NO_HEADER);
}
void zlibStream::Decompress_wx251_zlib114_Data_ZLib()
{
const unsigned char data[] = {120,156,171,202,201,76,82,72,73,44,73,84,72,46,74,77,44,73,77,81,40,207,44,201,80,40,175,8,207,76,73,79,45,41,86,48,210,51,213,171,80,136,246,77,44,74,206,80,48,50,143,213,1,202,69,249,120,58,197,131,8,29,133,42,144,126,67,61,67,61,19,0,191,86,23,216};
const char *value = "zlib data created with wxWidgets 2.5.x [March 27], wxZLIB_ZLIB, zlib 1.1.4";
const size_t data_size = sizeof(data);
const size_t value_size = strlen(value);
doDecompress_ExternalData(data, value, data_size, value_size);
}
void zlibStream::Decompress_gzip135Data()
{
// Compressed data was on the command line with gzip 1.3.5.
const unsigned char gzip135_data[] = {31,139,8,0,177,248,112,64,4,3,115,206,207,45,40,74,45,46,78,77,81,72,73,44,73,84,72,46,74,77,44,1,114,202,51,75,50,20,220,253,66,21,210,171,50,11,20,12,245,140,245,76,185,0,1,107,16,80,44,0,0,0,0};
const char *gzip135_value = "Compressed data created with GNU gzip 1.3.5\n";
// Size of the value and date items.
const size_t data_size = sizeof(gzip135_data);
const size_t value_size = strlen(gzip135_value);
// Perform a generic data test on the data.
doDecompress_ExternalData(gzip135_data, gzip135_value, data_size, value_size);
}
const char *zlibStream::GetDataBuffer()
{
return m_DataBuffer;
}
const unsigned char *zlibStream::GetCompressedData()
{
if (!m_pCompressedData)
{
// Construct the compressed data live.
wxMemoryOutputStream memstream_out;
{
const char *buf = "01234567890123456789012345678901234567890123456789"; /* = 50 */
wxZlibOutputStream zstream_out(memstream_out);
zstream_out.Write(buf, strlen(buf));
}
// Copy the to the
m_SizeCompressedData = memstream_out.GetSize();
m_pCompressedData = new unsigned char[m_SizeCompressedData];
memstream_out.CopyTo(m_pCompressedData, m_SizeCompressedData);
}
CPPUNIT_ASSERT(m_pCompressedData != NULL);
return m_pCompressedData;
}
void zlibStream::doTestStreamData(int input_flag, int output_flag, int compress_level)
{
size_t fail_pos;
char last_value = 0;
bool bWasEOF;
{ // Part one: Create a compressed file.
wxFileOutputStream fstream_out(FILENAME_GZ);
CPPUNIT_ASSERT(fstream_out.IsOk());
{
wxZlibOutputStream zstream_out(fstream_out, compress_level, output_flag);
CPPUNIT_ASSERT_MESSAGE("Could not create the output stream", zstream_out.IsOk());
// Next: Compress some data so the file is containing something.
zstream_out.Write(GetDataBuffer(), DATABUFFER_SIZE);
}
// Next thing is required by zlib versions pre 1.2.0.
if (input_flag == wxZLIB_NO_HEADER)
fstream_out.PutC(' ');
}
{ // Part two: Verify that the compressed data when uncompressed
// matches the original data.
wxFileInputStream fstream_in(FILENAME_GZ);
CPPUNIT_ASSERT(fstream_in.IsOk());
wxZlibInputStream zstream_in(fstream_in, input_flag);
CPPUNIT_ASSERT_MESSAGE("Could not create the input stream", zstream_in.IsOk());
// Next: Check char per char if the returned data is valid.
const char *pbuf = GetDataBuffer();
for (fail_pos = 0; !zstream_in.Eof(); fail_pos++)
{
last_value = zstream_in.GetC();
if (zstream_in.LastRead() != 1 ||
last_value != pbuf[fail_pos])
break;
}
bWasEOF = zstream_in.Eof();
}
// Remove the temp file...
::wxRemoveFile(FILENAME_GZ);
// Check state of the verify action.
if (fail_pos != DATABUFFER_SIZE || !bWasEOF)
{
wxString msg;
msg << _T("Wrong data item at pos ") << fail_pos
<< _T(" (Org_val ") << GetDataBuffer()[fail_pos]
<< _T(" != Zlib_val ") << last_value
<< _T("), with compression level ") << compress_level;
CPPUNIT_FAIL(string(msg.mb_str()));
}
}
void zlibStream::doDecompress_ExternalData(const unsigned char *data, const char *value, size_t data_size, size_t value_size, int flag)
{
// See that the input is ok.
wxASSERT(data != NULL);
wxASSERT(value != NULL);
wxASSERT(data_size > 0);
wxASSERT(value_size > 0);
// Quickly try to see if the data is valid.
switch (flag)
{
case wxZLIB_NO_HEADER:
break;
case wxZLIB_ZLIB:
if (!(data_size >= 1 && data[0] == 0x78))
wxLogError(_T("zlib data seems to not be zlib data!"));
break;
case wxZLIB_GZIP:
if (!(data_size >= 2 && data[0] == 0x1F && data[1] == 0x8B))
wxLogError(_T("gzip data seems to not be gzip data!"));
break;
case wxZLIB_AUTO:
if (!(data_size >= 1 && data[0] == 0x78) ||
!(data_size >= 2 && data[0] == 0x1F && data[1] == 0x8B))
wxLogError(_T("Data seems to not be zlib or gzip data!"));
default:
wxLogError(_T("Unknown flag, skipping quick test."));
};
// Creat the needed streams.
wxMemoryInputStream memstream_in(data, data_size);
CPPUNIT_ASSERT(memstream_in.IsOk());
wxZlibInputStream zstream_in(memstream_in, flag);
CPPUNIT_ASSERT(zstream_in.IsOk());
bool bValueEq = true;
size_t i;
for (i = 0; !zstream_in.Eof(); i++)
{
char last_value = zstream_in.GetC();
// First check if it is a valid read.
if (zstream_in.LastRead() == 1)
{
// Check the values
if (last_value != value[i])
{
bValueEq = false;
break;
}
}
else
{
// If the read failed and turned the stream to Eof we stop reading.
if (zstream_in.Eof())
break;
CPPUNIT_ASSERT_MESSAGE("Stream is no longer ok!", zstream_in.IsOk());
}
// Don't go over the end of the value buffer...
if (i == value_size)
{
// And if we do then try to see how long the stream actually is.
while (!zstream_in.Eof())
{
// Move one item along in the stream.
(void)zstream_in.GetC();
i++;
// Check if we are in an infinite loop by multiplying value_size
// by 5 to have a *much* bigger range then the real range.
// Note: Incase you ask your self, why 5, the answer is no reason...
// it is not to big and not to small a size, nothing more
// nothing less to it.
if (i > (value_size*5))
{
// Note: Please make sure Input_Eof test passed.
CPPUNIT_FAIL("Infinite stream detected, breaking the infinite loop");
return;
}
}
}
}
CPPUNIT_ASSERT_MESSAGE("Could not decompress the compressed data, original and restored value did not match.",
i == value_size && bValueEq);
}
wxZlibInputStream *zlibStream::DoCreateInStream()
{
const unsigned char *buf = GetCompressedData();
m_pTmpMemInStream = new wxMemoryInputStream(buf, m_SizeCompressedData);
CPPUNIT_ASSERT(m_pTmpMemInStream->IsOk());
wxZlibInputStream *pzstream_in = new wxZlibInputStream(*m_pTmpMemInStream);
CPPUNIT_ASSERT(pzstream_in->IsOk());
return pzstream_in;
}
wxZlibOutputStream *zlibStream::DoCreateOutStream()
{
m_pTmpMemOutStream = new wxMemoryOutputStream();
CPPUNIT_ASSERT(m_pTmpMemOutStream->IsOk());
wxZlibOutputStream *pzstream_out = new wxZlibOutputStream(*m_pTmpMemOutStream);
CPPUNIT_ASSERT(pzstream_out->IsOk());
return pzstream_out;
}
void zlibStream::DoDeleteInStream()
{
delete m_pTmpMemInStream;
m_pTmpMemInStream = NULL;
}
void zlibStream::DoDeleteOutStream()
{
delete m_pTmpMemOutStream;
m_pTmpMemOutStream = NULL;
}
void zlibStream::genExtTestData(wxTextOutputStream &out, const char *buf, int flag)
{
unsigned char *data;
size_t size;
{ // Gen data
wxMemoryOutputStream memstream_out;
{
wxZlibOutputStream zstream_out(memstream_out, wxZ_DEFAULT_COMPRESSION, flag);
zstream_out.Write(buf, strlen(buf));
}
if (flag == wxZLIB_NO_HEADER)
memstream_out.PutC(' ');
size = memstream_out.GetSize();
data = new unsigned char[size];
memstream_out.CopyTo(data, size);
}
out << _T("void zlibStream::Decompress_wxXXXData()") << _T("\n");
out << _T("{") << _T("\n") << _T(" const unsigned char data[] = {");
size_t i;
for (i = 0; i < size; i++)
{
if (i+1 != size)
out << wxString::Format(_T("%d,"), data[i]);
else
out << wxString::Format(_T("%d"), data[i]);
}
delete [] data;
out << _T("};") << _T("\n");
out << _T(" const char *value = \"") << wxString(buf, wxConvUTF8) << _T("\";") << _T("\n");
out << _T(" const size_t data_size = sizeof(data);") << _T("\n");
out << _T(" const size_t value_size = strlen(value);") << _T("\n");
out << _T(" doDecompress_ExternalData(data, value, data_size, value_size);") << _T("\n");
out << _T("}") << _T("\n");
}
// Register the stream sub suite, by using some stream helper macro.
// Note: Don't forget to connect it to the base suite (See: bstream.cpp => StreamCase::suite())
STREAM_TEST_SUBSUITE_NAMED_REGISTRATION(zlibStream)
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