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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/QtTest>
#include <private/qringbuffer_p.h>
class tst_QRingBuffer : public QObject
{
Q_OBJECT
public:
tst_QRingBuffer();
virtual ~tst_QRingBuffer();
public slots:
void initTestCase();
void cleanupTestCase();
private slots:
void readPointerAtPositionWriteRead();
void readPointerAtPositionEmptyRead();
void readPointerAtPositionWithHead();
void readPointerAtPositionReadTooMuch();
void sizeWhenEmpty();
void sizeWhenReservedAndChopped();
void sizeWhenReserved();
};
tst_QRingBuffer::tst_QRingBuffer()
{
}
tst_QRingBuffer::~tst_QRingBuffer()
{
}
void tst_QRingBuffer::initTestCase()
{
}
void tst_QRingBuffer::cleanupTestCase()
{
}
void tst_QRingBuffer::sizeWhenReserved()
{
QRingBuffer ringBuffer;
ringBuffer.reserve(5);
QCOMPARE(ringBuffer.size(), 5);
}
void tst_QRingBuffer::sizeWhenReservedAndChopped()
{
QRingBuffer ringBuffer;
ringBuffer.reserve(31337);
ringBuffer.chop(31337);
QCOMPARE(ringBuffer.size(), 0);
}
void tst_QRingBuffer::sizeWhenEmpty()
{
QRingBuffer ringBuffer;
QCOMPARE(ringBuffer.size(), 0);
}
void tst_QRingBuffer::readPointerAtPositionReadTooMuch()
{
QRingBuffer ringBuffer;
qint64 length;
const char *buf = ringBuffer.readPointerAtPosition(42, length);
QVERIFY(buf == 0);
QVERIFY(length == 0);
}
void tst_QRingBuffer::readPointerAtPositionWithHead()
{
QRingBuffer ringBuffer;
char *buf = ringBuffer.reserve(4);
memcpy (buf, "0123", 4);
ringBuffer.free(2);
// ringBuffer should have stayed the same except
// its head it had moved to position 2
qint64 length;
const char* buf2 = ringBuffer.readPointerAtPosition(0, length);
QCOMPARE(length, qint64(2));
QVERIFY(*buf2 == '2');
QVERIFY(*(buf2+1) == '3');
// advance 2 more, ringBuffer should be empty then
ringBuffer.free(2);
buf2 = ringBuffer.readPointerAtPosition(0, length);
QCOMPARE(length, qint64(0));
QVERIFY(buf2 == 0);
}
void tst_QRingBuffer::readPointerAtPositionEmptyRead()
{
QRingBuffer ringBuffer;
qint64 length;
const char *buf = ringBuffer.readPointerAtPosition(0, length);
QVERIFY(buf == 0);
QVERIFY(length == 0);
}
void tst_QRingBuffer::readPointerAtPositionWriteRead()
{
//create some data
QBuffer inData;
inData.open(QIODevice::ReadWrite);
inData.putChar(0x42);
inData.putChar(0x23);
inData.write("Qt rocks!");
for (int i = 0; i < 5000; i++)
inData.write(QString("Number %1").arg(i).toUtf8());
inData.reset();
QVERIFY(inData.size() > 0);
//put the inData in the QRingBuffer
QRingBuffer ringBuffer;
qint64 remaining = inData.size();
while (remaining > 0) {
// write in chunks of 50 bytes
// this ensures there will be multiple QByteArrays inside the QRingBuffer
// since QRingBuffer is then only using individual arrays of around 4000 bytes
qint64 thisWrite = qMin(remaining, qint64(50));
char *pos = ringBuffer.reserve(thisWrite);
inData.read(pos, thisWrite);
remaining -= thisWrite;
}
// was data put into it?
QVERIFY(ringBuffer.size() > 0);
QCOMPARE(qint64(ringBuffer.size()), inData.size());
//read from the QRingBuffer in loop, put back into another QBuffer
QBuffer outData;
outData.open(QIODevice::ReadWrite);
remaining = ringBuffer.size();
while (remaining > 0) {
qint64 thisRead;
// always try to read as much as possible
const char *buf = ringBuffer.readPointerAtPosition(ringBuffer.size() - remaining, thisRead);
outData.write(buf, thisRead);
remaining -= thisRead;
}
outData.reset();
QVERIFY(outData.size() > 0);
// was the data read from the QRingBuffer the same as the one written into it?
QCOMPARE(outData.size(), inData.size());
QVERIFY(outData.buffer().startsWith(inData.buffer()));
}
QTEST_APPLESS_MAIN(tst_QRingBuffer)
#include "tst_qringbuffer.moc"
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