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diff --git a/tests/auto/qringbuffer/tst_qringbuffer.cpp b/tests/auto/qringbuffer/tst_qringbuffer.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** 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"