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///////////////////////////////////////////////////////////////////////////////
// Name: tests/streams/backfile.cpp
// Purpose: Test wxBackingFile
// Author: Mike Wetherell
// Copyright: (c) 2006 Mike Wetherell
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#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/mstream.h"
#include "wx/private/fileback.h"
#include "bstream.h"
const size_t TESTSIZE = 256;
const size_t BUFSIZE = 100;
///////////////////////////////////////////////////////////////////////////////
// Parent stream for testing
class TestStream : public wxMemoryInputStream
{
public:
TestStream(const void *buf, size_t size)
: wxMemoryInputStream(buf, size) { }
wxFileOffset GetLength() const { return wxInvalidOffset; }
};
///////////////////////////////////////////////////////////////////////////////
// The test case
class backStream : public CppUnit::TestCase
{
public:
backStream();
CPPUNIT_TEST_SUITE(backStream);
CPPUNIT_TEST(ReadLenSeek);
CPPUNIT_TEST(LenSeekRead);
CPPUNIT_TEST(SeekReadLen);
CPPUNIT_TEST(ReadAll);
CPPUNIT_TEST(ReadTooMuch);
CPPUNIT_TEST(EmptyStream);
CPPUNIT_TEST_SUITE_END();
void ReadLenSeek();
void LenSeekRead();
void SeekReadLen();
void ReadAll();
void ReadTooMuch();
void EmptyStream();
private:
void Read(wxInputStream& in, size_t size1, size_t size2, size_t size3);
void Len(wxBackedInputStream& in);
void Seek(wxInputStream& in);
char m_testdata[TESTSIZE];
};
backStream::backStream()
{
for (unsigned i = 0; i < TESTSIZE; i++)
m_testdata[i] = i;
}
void backStream::ReadLenSeek()
{
wxBackingFile bf(new TestStream(m_testdata, TESTSIZE), BUFSIZE);
wxBackedInputStream in(bf);
Read(in, BUFSIZE, BUFSIZE / 2, 2 * BUFSIZE / 3);
Len(in);
Seek(in);
}
void backStream::LenSeekRead()
{
wxBackingFile bf(new TestStream(m_testdata, TESTSIZE), BUFSIZE);
wxBackedInputStream in(bf);
Len(in);
Seek(in);
Read(in, BUFSIZE, BUFSIZE / 2, 2 * BUFSIZE / 3);
}
void backStream::SeekReadLen()
{
wxBackingFile bf(new TestStream(m_testdata, TESTSIZE), BUFSIZE);
wxBackedInputStream in(bf);
Seek(in);
Read(in, BUFSIZE, BUFSIZE / 2, 2 * BUFSIZE / 3);
Len(in);
}
void backStream::ReadAll()
{
wxBackingFile bf(new TestStream(m_testdata, TESTSIZE), BUFSIZE);
wxBackedInputStream in(bf);
Read(in, TESTSIZE, 0, 0);
}
void backStream::ReadTooMuch()
{
wxBackingFile bf(new TestStream(m_testdata, TESTSIZE), BUFSIZE);
wxBackedInputStream in(bf);
char buf[TESTSIZE * 2];
CPPUNIT_ASSERT_EQUAL(TESTSIZE, in.Read(buf, TESTSIZE * 2).LastRead());
CPPUNIT_ASSERT(in.Eof());
CPPUNIT_ASSERT(memcmp(buf, m_testdata, TESTSIZE) == 0);
}
void backStream::EmptyStream()
{
wxBackingFile bf(new TestStream(m_testdata, 0), BUFSIZE);
wxBackedInputStream in(bf);
char buf[1];
CPPUNIT_ASSERT_EQUAL(size_t(0), in.Read(buf, 1).LastRead());
CPPUNIT_ASSERT(in.Eof());
}
void backStream::Read(wxInputStream& in,
size_t size1,
size_t size2,
size_t size3)
{
const size_t remainder = TESTSIZE - size1 - size2 - size3;
char buf[TESTSIZE];
char *testdata = m_testdata;
in.SeekI(0);
CPPUNIT_ASSERT_EQUAL(size1, in.Read(buf, size1).LastRead());
CPPUNIT_ASSERT(in.IsOk());
CPPUNIT_ASSERT(memcmp(buf, testdata, size1) == 0);
testdata += size1;
CPPUNIT_ASSERT_EQUAL(size2, in.Read(buf, size2).LastRead());
CPPUNIT_ASSERT(in.IsOk());
CPPUNIT_ASSERT(memcmp(buf, testdata, size2) == 0);
testdata += size2;
CPPUNIT_ASSERT_EQUAL(size3, in.Read(buf, size3).LastRead());
CPPUNIT_ASSERT(in.IsOk());
CPPUNIT_ASSERT(memcmp(buf, testdata, size3) == 0);
testdata += size3;
CPPUNIT_ASSERT_EQUAL(remainder, in.Read(buf, TESTSIZE).LastRead());
CPPUNIT_ASSERT(in.Eof());
CPPUNIT_ASSERT(memcmp(buf, testdata, remainder) == 0);
CPPUNIT_ASSERT_EQUAL(size_t(0), in.Read(buf, TESTSIZE).LastRead());
CPPUNIT_ASSERT(in.Eof());
}
void backStream::Len(wxBackedInputStream& in)
{
CPPUNIT_ASSERT_EQUAL(wxFileOffset(TESTSIZE), in.FindLength());
}
void backStream::Seek(wxInputStream& in)
{
CPPUNIT_ASSERT_EQUAL(wxFileOffset(TESTSIZE), in.SeekI(TESTSIZE));
in.GetC();
CPPUNIT_ASSERT_EQUAL(size_t(0), in.LastRead());
CPPUNIT_ASSERT(in.Eof());
for (wxFileOffset i = TESTSIZE - 1; i >= 0; i--) {
CPPUNIT_ASSERT_EQUAL(i, in.SeekI(i));
CPPUNIT_ASSERT_EQUAL(i, in.TellI());
CPPUNIT_ASSERT_EQUAL(int(i), in.GetC());
CPPUNIT_ASSERT_EQUAL(size_t(1), in.LastRead());
CPPUNIT_ASSERT(in.IsOk());
}
}
// 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(backStream)
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