qt-everywhere-src-5.15.1/qtbase/tests/auto/corelib/io/qbuffer/tst_qbuffer.cpp - orbit - Git at Google

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 ** This file is part of the test suite of the Qt Toolkit.
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 ** GNU General Public License Usage
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 #include <QtTest/QtTest>

 #include <QBuffer>
 #include <QByteArray>

 class tst_QBuffer : public QObject
 {
     Q_OBJECT
 private slots:
     void open();
     void getSetCheck();
     void readBlock();
     void readBlockPastEnd();
     void writeBlock_data();
     void writeBlock();
     void seek();
     void seekTest_data();
     void seekTest();
     void read_rawdata();
     void isSequential();
     void signalTest_data();
     void signalTest();
     void isClosedAfterClose();
     void readLine_data();
     void readLine();
     void canReadLine_data();
     void canReadLine();
     void atEnd();
     void readLineBoundaries();
     void getAndUngetChar();
     void writeAfterQByteArrayResize();
     void read_null();

 protected slots:
     void readyReadSlot();
     void bytesWrittenSlot(qint64 written);

 private:
     qint64 totalBytesWritten;
     bool gotReadyRead;
 };

 // Testing get/set functions
 void tst_QBuffer::getSetCheck()
 {
     QBuffer obj1;
     // const QByteArray & QBuffer::data()
     // void QBuffer::setData(const QByteArray &)
     QByteArray var1("Bogus data");
     obj1.setData(var1);
     QCOMPARE(var1, obj1.data());
     obj1.setData(QByteArray());
     QCOMPARE(QByteArray(), obj1.data());
 }

 void tst_QBuffer::open()
 {
     QByteArray data(10, 'f');

     QBuffer b;

     QTest::ignoreMessage(QtWarningMsg, "QBuffer::open: Buffer access not specified");
     QVERIFY(!b.open(QIODevice::NotOpen));
     QVERIFY(!b.isOpen());
     b.close();

     QTest::ignoreMessage(QtWarningMsg, "QBuffer::open: Buffer access not specified");
     QVERIFY(!b.open(QIODevice::Text));
     QVERIFY(!b.isOpen());
     b.close();

     QTest::ignoreMessage(QtWarningMsg, "QBuffer::open: Buffer access not specified");
     QVERIFY(!b.open(QIODevice::Unbuffered));
     QVERIFY(!b.isOpen());
     b.close();

     QVERIFY(b.open(QIODevice::ReadOnly));
     QVERIFY(b.isReadable());
     b.close();

     QVERIFY(b.open(QIODevice::WriteOnly));
     QVERIFY(b.isWritable());
     b.close();

     b.setData(data);
     QVERIFY(b.open(QIODevice::Append));
     QVERIFY(b.isWritable());
     QCOMPARE(b.size(), qint64(10));
     QCOMPARE(b.pos(), b.size());
     b.close();

     b.setData(data);
     QVERIFY(b.open(QIODevice::Truncate));
     QVERIFY(b.isWritable());
     QCOMPARE(b.size(), qint64(0));
     QCOMPARE(b.pos(), qint64(0));
     b.close();

     QVERIFY(b.open(QIODevice::ReadWrite));
     QVERIFY(b.isReadable());
     QVERIFY(b.isWritable());
     b.close();
 }

 // some status() tests, too
 void tst_QBuffer::readBlock()
 {
     const int arraySize = 10;
     char a[arraySize];
     QBuffer b;
     QCOMPARE(b.bytesAvailable(), (qint64) 0); // no data
     QCOMPARE(b.read(a, arraySize), (qint64) -1); // not opened
     QVERIFY(b.atEnd());

     QByteArray ba;
     ba.resize(arraySize);
     b.setBuffer(&ba);
     QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
     b.open(QIODevice::WriteOnly);
     QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
     QTest::ignoreMessage(QtWarningMsg, "QIODevice::read (QBuffer): WriteOnly device");
     QCOMPARE(b.read(a, arraySize), (qint64) -1); // no read access
     b.close();

     b.open(QIODevice::ReadOnly);
     QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
     QCOMPARE(b.read(a, arraySize), (qint64) arraySize);
     QVERIFY(b.atEnd());
     QCOMPARE(b.bytesAvailable(), (qint64) 0);

     // up to 3.0.x reading beyond the end was an error while ok
     // this has been made consistent with other QIODevice sub classes in 3.1
     QCOMPARE(b.read(a, 1), qint64(0));
     QVERIFY(b.atEnd());

     // read in two chunks
     b.close();
     b.open(QIODevice::ReadOnly);
     QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
     QCOMPARE(b.read(a, arraySize/2), (qint64) arraySize/2);
     QCOMPARE(b.bytesAvailable(), (qint64) arraySize/2);
     QCOMPARE(b.read(a + arraySize/2, arraySize - arraySize/2),
             (qint64)(arraySize - arraySize/2));
     QVERIFY(b.atEnd());
     QCOMPARE(b.bytesAvailable(), (qint64) 0);
 }

 void tst_QBuffer::readBlockPastEnd()
 {
     QByteArray arr(4096 + 3616, 'd');
     QBuffer buf(&arr);

     buf.open(QIODevice::ReadOnly);
     char dummy[4096];

     buf.read(1);

     QCOMPARE(buf.read(dummy, 4096), qint64(4096));
     QCOMPARE(buf.read(dummy, 4096), qint64(3615));
     QVERIFY(buf.atEnd());
 }

 void tst_QBuffer::writeBlock_data()
 {
     QTest::addColumn<QString>("str");

     QTest::newRow( "small_bytearray" ) << QString("Test");
     QTest::newRow( "large_bytearray" ) << QString(
         "The QBuffer class is an I/O device that operates on a QByteArray.\n"
         "QBuffer is used to read and write to a memory buffer. It is normally "
         "used with a QTextStream or a QDataStream. QBuffer has an associated "
         "QByteArray which holds the buffer data. The size() of the buffer is "
         "automatically adjusted as data is written.\n"
         "The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
         "byte array. The byte array can also be set with setBuffer(). Writing to "
         "the QBuffer will modify the original byte array because QByteArray is "
         "explicitly shared.\n"
         "Use open() to open the buffer before use and to set the mode (read-only, "
         "write-only, etc.). close() closes the buffer. The buffer must be closed "
         "before reopening or calling setBuffer().\n"
         "A common way to use QBuffer is through QDataStream or QTextStream, which "
         "have constructors that take a QBuffer parameter. For convenience, there "
         "are also QDataStream and QTextStream constructors that take a QByteArray "
         "parameter. These constructors create and open an internal QBuffer.\n"
         "Note that QTextStream can also operate on a QString (a Unicode string); a "
         "QBuffer cannot.\n"
         "You can also use QBuffer directly through the standard QIODevice functions "
         "readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
         "See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
         "Classes and Input/Output and Networking.\n\n"
         "The QBuffer class is an I/O device that operates on a QByteArray.\n"
         "QBuffer is used to read and write to a memory buffer. It is normally "
         "used with a QTextStream or a QDataStream. QBuffer has an associated "
         "QByteArray which holds the buffer data. The size() of the buffer is "
         "automatically adjusted as data is written.\n"
         "The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
         "byte array. The byte array can also be set with setBuffer(). Writing to "
         "the QBuffer will modify the original byte array because QByteArray is "
         "explicitly shared.\n"
         "Use open() to open the buffer before use and to set the mode (read-only, "
         "write-only, etc.). close() closes the buffer. The buffer must be closed "
         "before reopening or calling setBuffer().\n"
         "A common way to use QBuffer is through QDataStream or QTextStream, which "
         "have constructors that take a QBuffer parameter. For convenience, there "
         "are also QDataStream and QTextStream constructors that take a QByteArray "
         "parameter. These constructors create and open an internal QBuffer.\n"
         "Note that QTextStream can also operate on a QString (a Unicode string); a "
         "QBuffer cannot.\n"
         "You can also use QBuffer directly through the standard QIODevice functions "
         "readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
         "See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
         "Classes and Input/Output and Networking.\n\n"
         "The QBuffer class is an I/O device that operates on a QByteArray.\n"
         "QBuffer is used to read and write to a memory buffer. It is normally "
         "used with a QTextStream or a QDataStream. QBuffer has an associated "
         "QByteArray which holds the buffer data. The size() of the buffer is "
         "automatically adjusted as data is written.\n"
         "The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
         "byte array. The byte array can also be set with setBuffer(). Writing to "
         "the QBuffer will modify the original byte array because QByteArray is "
         "explicitly shared.\n"
         "Use open() to open the buffer before use and to set the mode (read-only, "
         "write-only, etc.). close() closes the buffer. The buffer must be closed "
         "before reopening or calling setBuffer().\n"
         "A common way to use QBuffer is through QDataStream or QTextStream, which "
         "have constructors that take a QBuffer parameter. For convenience, there "
         "are also QDataStream and QTextStream constructors that take a QByteArray "
         "parameter. These constructors create and open an internal QBuffer.\n"
         "Note that QTextStream can also operate on a QString (a Unicode string); a "
         "QBuffer cannot.\n"
         "You can also use QBuffer directly through the standard QIODevice functions "
         "readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
         "See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
         "Classes and Input/Output and Networking.");
 }

 void tst_QBuffer::writeBlock()
 {
     QFETCH( QString, str );

     QByteArray ba;
     QBuffer buf( &ba );
     buf.open(QIODevice::ReadWrite);
     QByteArray data = str.toLatin1();
     QCOMPARE(buf.write( data.constData(), data.size() ), qint64(data.size()));

     QCOMPARE(buf.data(), str.toLatin1());
 }

 void tst_QBuffer::seek()
 {
     QBuffer buffer;
     buffer.open(QIODevice::WriteOnly);
     QCOMPARE(buffer.size(), qint64(0));
     QCOMPARE(buffer.pos(), qint64(0));
     const qint64 pos = 10;
     QVERIFY(buffer.seek(pos));
     QCOMPARE(buffer.size(), pos);
 }

 void tst_QBuffer::seekTest_data()
 {
     writeBlock_data();
 }

 #define DO_VALID_SEEK(position) {                                            \
     char c;                                                                  \
     QVERIFY(buf.seek(qint64(position)));                                      \
     QCOMPARE(buf.pos(), qint64(position));                                    \
     QVERIFY(buf.getChar(&c));                                                 \
     QCOMPARE(QChar(c), str.at(qint64(position)));                             \
 }
 #define DO_INVALID_SEEK(position) {                                          \
     qint64 prev_pos = buf.pos();                                             \
     QVERIFY(!buf.seek(qint64(position)));                                     \
     QCOMPARE(buf.pos(), prev_pos); /* position should not be changed */                  \
 }

 void tst_QBuffer::seekTest()
 {
     QFETCH(QString, str);

     QByteArray ba;
     QBuffer buf(&ba);
     QCOMPARE(buf.pos(), qint64(0));

     buf.open(QIODevice::ReadWrite);
     QCOMPARE(buf.pos(), qint64(0));
     QCOMPARE(buf.bytesAvailable(), qint64(0));

     QByteArray data = str.toLatin1();
     QCOMPARE(buf.write( data.constData(), data.size() ), qint64(data.size()));
     QCOMPARE(buf.bytesAvailable(), qint64(0)); // we're at the end
     QCOMPARE(buf.size(), qint64(data.size()));

     QTest::ignoreMessage(QtWarningMsg, "QBuffer::seek: Invalid pos: -1");
     DO_INVALID_SEEK(-1);

     DO_VALID_SEEK(0);
     DO_VALID_SEEK(str.size() - 1);
     QVERIFY(buf.atEnd());
     DO_VALID_SEEK(str.size() / 2);

     // Special case: valid to seek one position past the buffer.
     // Its then legal to write, but not read.
     {
         char c = 'a';
         QVERIFY(buf.seek(qint64(str.size())));
         QCOMPARE(buf.bytesAvailable(), qint64(0));
         QCOMPARE(buf.read(&c, qint64(1)), qint64(0));
         QCOMPARE(c, 'a');
         QCOMPARE(buf.write(&c, qint64(1)), qint64(1));
     }

     // Special case 2: seeking to an arbitrary position beyond the buffer auto-expands it
     {
         char c;
         const int offset = 1; // any positive integer will do
         const qint64 pos = buf.size() + offset;
         QVERIFY(buf.seek(pos));
         QCOMPARE(buf.bytesAvailable(), qint64(0));
         QCOMPARE(buf.pos(), pos);
         QVERIFY(!buf.getChar(&c));
         QVERIFY(buf.seek(pos - 1));
         QVERIFY(buf.getChar(&c));
         QCOMPARE(c, buf.data().at(pos - 1));
         QVERIFY(buf.seek(pos));
         QVERIFY(buf.putChar(c));
     }
 }

 void tst_QBuffer::read_rawdata()
 {
     static const unsigned char mydata[] = {
         0x01, 0x00, 0x03, 0x84, 0x78, 0x9c, 0x3b, 0x76,
         0xec, 0x18, 0xc3, 0x31, 0x0a, 0xf1, 0xcc, 0x99,
         0x6d, 0x5b
     };

     QByteArray data = QByteArray::fromRawData((const char *)mydata, sizeof(mydata));
     QBuffer buffer(&data);
     buffer.open(QIODevice::ReadOnly);
     QDataStream in(&buffer);
     quint8 ch;
     for (int i = 0; i < (int)sizeof(mydata); ++i) {
         QVERIFY(!buffer.atEnd());
         in >> ch;
         QCOMPARE(ch, (quint8)mydata[i]);
     }
     QVERIFY(buffer.atEnd());
 }

 void tst_QBuffer::isSequential()
 {
     QBuffer buf;
     QVERIFY(!buf.isSequential());
 }

 void tst_QBuffer::signalTest_data()
 {
     QTest::addColumn<QByteArray>("sample");

     QTest::newRow("empty") << QByteArray();
     QTest::newRow("size 1") << QByteArray("1");
     QTest::newRow("size 2") << QByteArray("11");
     QTest::newRow("size 100") << QByteArray(100, '1');
 }

 void tst_QBuffer::signalTest()
 {
     QFETCH(QByteArray, sample);

     totalBytesWritten = 0;

     QBuffer buf;
     buf.open(QIODevice::WriteOnly);

     buf.buffer().resize(sample.size() * 10);
     connect(&buf, SIGNAL(readyRead()), this, SLOT(readyReadSlot()));
     connect(&buf, SIGNAL(bytesWritten(qint64)), this, SLOT(bytesWrittenSlot(qint64)));

     for (int i = 0; i < 10; ++i) {
         gotReadyRead = false;
         QCOMPARE(buf.write(sample), qint64(sample.size()));
         if (sample.size() > 0) {
             QTestEventLoop::instance().enterLoop(5);
             if (QTestEventLoop::instance().timeout())
                 QFAIL("Timed out when waiting for readyRead()");
             QCOMPARE(totalBytesWritten, qint64(sample.size() * (i + 1)));
             QVERIFY(gotReadyRead);
         } else {
             QCOMPARE(totalBytesWritten, qint64(0));
             QVERIFY(!gotReadyRead);
         }
     }
 }

 void tst_QBuffer::readyReadSlot()
 {
     gotReadyRead = true;
     QTestEventLoop::instance().exitLoop();
 }

 void tst_QBuffer::bytesWrittenSlot(qint64 written)
 {
     totalBytesWritten += written;
 }

 void tst_QBuffer::isClosedAfterClose()
 {
     QBuffer buffer;
     buffer.open(QBuffer::ReadOnly);
     QVERIFY(buffer.isOpen());
     buffer.close();
     QVERIFY(!buffer.isOpen());
 }

 void tst_QBuffer::readLine_data()
 {
     QTest::addColumn<QByteArray>("src");
     QTest::addColumn<int>("maxlen");
     QTest::addColumn<QByteArray>("expected");

     QTest::newRow("1") << QByteArray("line1\nline2\n") << 1024
                     << QByteArray("line1\n");
     QTest::newRow("2") << QByteArray("hi there") << 1024
                     << QByteArray("hi there");
     QTest::newRow("3") << QByteArray("l\n") << 3 << QByteArray("l\n");
     QTest::newRow("4") << QByteArray("l\n") << 2 << QByteArray("l");
 }

 void tst_QBuffer::readLine()
 {
     QFETCH(QByteArray, src);
     QFETCH(int, maxlen);
     QFETCH(QByteArray, expected);

     QBuffer buf;
     buf.setBuffer(&src);
     char *result = new char[maxlen + 1];
     result[maxlen] = '\0';

     QVERIFY(buf.open(QIODevice::ReadOnly));

     qint64 bytes_read = buf.readLine(result, maxlen);

     QCOMPARE(bytes_read, qint64(expected.size()));
     QCOMPARE(QByteArray(result), expected);

     buf.close();
     delete[] result;

 }

 void tst_QBuffer::canReadLine_data()
 {
     QTest::addColumn<QByteArray>("src");
     QTest::addColumn<bool>("expected");

     QTest::newRow("1") << QByteArray("no newline") << false;
     QTest::newRow("2") << QByteArray("two \n lines\n") << true;
     QTest::newRow("3") << QByteArray("\n") << true;
     QTest::newRow("4") << QByteArray() << false;
 }

 void tst_QBuffer::canReadLine()
 {
     QFETCH(QByteArray, src);
     QFETCH(bool, expected);

     QBuffer buf;
     buf.setBuffer(&src);
     QVERIFY(!buf.canReadLine());
     QVERIFY(buf.open(QIODevice::ReadOnly));
     QCOMPARE(buf.canReadLine(), expected);
 }

 void tst_QBuffer::atEnd()
 {
     QBuffer buffer;
     buffer.open(QBuffer::Append);
     buffer.write("heisann");
     buffer.close();

     buffer.open(QBuffer::ReadOnly);
     buffer.seek(buffer.size());
     char c;
     QVERIFY(!buffer.getChar(&c));
     QCOMPARE(buffer.read(&c, 1), qint64(0));
 }

 // Test that reading data out of a QBuffer a line at a time gives the same
 // result as reading the whole buffer at once.
 void tst_QBuffer::readLineBoundaries()
 {
     QByteArray line = "This is a line\n";
     QBuffer buffer;
     buffer.open(QIODevice::ReadWrite);
     while (buffer.size() < 16384)
         buffer.write(line);

     buffer.seek(0);
     QByteArray lineByLine;
     while (!buffer.atEnd())
         lineByLine.append(buffer.readLine());

     buffer.seek(0);
     QCOMPARE(buffer.bytesAvailable(), lineByLine.size());

     QByteArray all = buffer.readAll();
     QCOMPARE(all.size(), lineByLine.size());
     QCOMPARE(all, lineByLine);
 }

 // Test that any character in a buffer can be read and pushed back.
 void tst_QBuffer::getAndUngetChar()
 {
     // Create some data in a buffer
     QByteArray line = "This is a line\n";
     QBuffer buffer;
     buffer.open(QIODevice::ReadWrite);
     while (buffer.size() < 16384)
         buffer.write(line);

     // Take a copy of the data held in the buffer
     buffer.seek(0);
     QCOMPARE(buffer.bytesAvailable(), buffer.size());
     QByteArray data = buffer.readAll();
     QCOMPARE(buffer.bytesAvailable(), qint64(0));

     // Get and unget each character in order
     for (qint64 i = 0; i < buffer.size(); ++i) {
         buffer.seek(i);
         char c;
         QVERIFY(buffer.getChar(&c));
         QCOMPARE(c, data.at((uint)i));
         buffer.ungetChar(c);
     }

     // Get and unget each character in reverse order
     for (qint64 i = buffer.size() - 1; i >= 0; --i) {
         buffer.seek(i);
         char c;
         QVERIFY(buffer.getChar(&c));
         QCOMPARE(c, data.at((uint)i));
         buffer.ungetChar(c);
     }

     // Verify that the state of the buffer still matches the original data.
     buffer.seek(0);
     QCOMPARE(buffer.bytesAvailable(), data.size());
     QCOMPARE(buffer.readAll(), data);
     QCOMPARE(buffer.bytesAvailable(), qint64(0));
 }

 void tst_QBuffer::writeAfterQByteArrayResize()
 {
     QBuffer buffer;
     QVERIFY(buffer.open(QIODevice::WriteOnly));

     buffer.write(QByteArray().fill('a', 1000));
     QCOMPARE(buffer.buffer().size(), 1000);

     // resize the QByteArray behind QBuffer's back
     buffer.buffer().clear();
     buffer.seek(0);
     QCOMPARE(buffer.buffer().size(), 0);

     buffer.write(QByteArray().fill('b', 1000));
     QCOMPARE(buffer.buffer().size(), 1000);
 }

 void tst_QBuffer::read_null()
 {
     QByteArray buffer;
     buffer.resize(32000);
     for (int i = 0; i < buffer.size(); ++i)
         buffer[i] = char(i & 0xff);

     QBuffer in(&buffer);
     in.open(QIODevice::ReadOnly);

     QByteArray chunk;

     chunk.resize(16380);
     in.read(chunk.data(), 16380);

     QCOMPARE(chunk, buffer.mid(0, chunk.size()));

     in.read(chunk.data(), 0);

     chunk.resize(8);
     in.read(chunk.data(), chunk.size());

     QCOMPARE(chunk, buffer.mid(16380, chunk.size()));
 }

 QTEST_MAIN(tst_QBuffer)
 #include "tst_qbuffer.moc"
	/****************************************************************************
	**
	** Copyright (C) 2016 The Qt Company Ltd.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the test suite of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:GPL-EXCEPT$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in
	** accordance with the commercial license agreement provided with the
	** Software or, alternatively, in accordance with the terms contained in
	** a written agreement between you and The Qt Company. For licensing terms
	** and conditions see https://www.qt.io/terms-conditions. For further
	** information use the contact form at https://www.qt.io/contact-us.
	**
	** GNU General Public License Usage
	** Alternatively, this file may be used under the terms of the GNU
	** General Public License version 3 as published by the Free Software
	** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
	** included in the packaging of this file. Please review the following
	** information to ensure the GNU General Public License requirements will
	** be met: https://www.gnu.org/licenses/gpl-3.0.html.
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include <QtTest/QtTest>

	#include <QBuffer>
	#include <QByteArray>

	class tst_QBuffer : public QObject
	{
	Q_OBJECT
	private slots:
	void open();
	void getSetCheck();
	void readBlock();
	void readBlockPastEnd();
	void writeBlock_data();
	void writeBlock();
	void seek();
	void seekTest_data();
	void seekTest();
	void read_rawdata();
	void isSequential();
	void signalTest_data();
	void signalTest();
	void isClosedAfterClose();
	void readLine_data();
	void readLine();
	void canReadLine_data();
	void canReadLine();
	void atEnd();
	void readLineBoundaries();
	void getAndUngetChar();
	void writeAfterQByteArrayResize();
	void read_null();

	protected slots:
	void readyReadSlot();
	void bytesWrittenSlot(qint64 written);

	private:
	qint64 totalBytesWritten;
	bool gotReadyRead;
	};

	// Testing get/set functions
	void tst_QBuffer::getSetCheck()
	{
	QBuffer obj1;
	// const QByteArray & QBuffer::data()
	// void QBuffer::setData(const QByteArray &)
	QByteArray var1("Bogus data");
	obj1.setData(var1);
	QCOMPARE(var1, obj1.data());
	obj1.setData(QByteArray());
	QCOMPARE(QByteArray(), obj1.data());
	}

	void tst_QBuffer::open()
	{
	QByteArray data(10, 'f');

	QBuffer b;

	QTest::ignoreMessage(QtWarningMsg, "QBuffer::open: Buffer access not specified");
	QVERIFY(!b.open(QIODevice::NotOpen));
	QVERIFY(!b.isOpen());
	b.close();

	QTest::ignoreMessage(QtWarningMsg, "QBuffer::open: Buffer access not specified");
	QVERIFY(!b.open(QIODevice::Text));
	QVERIFY(!b.isOpen());
	b.close();

	QTest::ignoreMessage(QtWarningMsg, "QBuffer::open: Buffer access not specified");
	QVERIFY(!b.open(QIODevice::Unbuffered));
	QVERIFY(!b.isOpen());
	b.close();

	QVERIFY(b.open(QIODevice::ReadOnly));
	QVERIFY(b.isReadable());
	b.close();

	QVERIFY(b.open(QIODevice::WriteOnly));
	QVERIFY(b.isWritable());
	b.close();

	b.setData(data);
	QVERIFY(b.open(QIODevice::Append));
	QVERIFY(b.isWritable());
	QCOMPARE(b.size(), qint64(10));
	QCOMPARE(b.pos(), b.size());
	b.close();

	b.setData(data);
	QVERIFY(b.open(QIODevice::Truncate));
	QVERIFY(b.isWritable());
	QCOMPARE(b.size(), qint64(0));
	QCOMPARE(b.pos(), qint64(0));
	b.close();

	QVERIFY(b.open(QIODevice::ReadWrite));
	QVERIFY(b.isReadable());
	QVERIFY(b.isWritable());
	b.close();
	}

	// some status() tests, too
	void tst_QBuffer::readBlock()
	{
	const int arraySize = 10;
	char a[arraySize];
	QBuffer b;
	QCOMPARE(b.bytesAvailable(), (qint64) 0); // no data
	QCOMPARE(b.read(a, arraySize), (qint64) -1); // not opened
	QVERIFY(b.atEnd());

	QByteArray ba;
	ba.resize(arraySize);
	b.setBuffer(&ba);
	QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
	b.open(QIODevice::WriteOnly);
	QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
	QTest::ignoreMessage(QtWarningMsg, "QIODevice::read (QBuffer): WriteOnly device");
	QCOMPARE(b.read(a, arraySize), (qint64) -1); // no read access
	b.close();

	b.open(QIODevice::ReadOnly);
	QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
	QCOMPARE(b.read(a, arraySize), (qint64) arraySize);
	QVERIFY(b.atEnd());
	QCOMPARE(b.bytesAvailable(), (qint64) 0);

	// up to 3.0.x reading beyond the end was an error while ok
	// this has been made consistent with other QIODevice sub classes in 3.1
	QCOMPARE(b.read(a, 1), qint64(0));
	QVERIFY(b.atEnd());

	// read in two chunks
	b.close();
	b.open(QIODevice::ReadOnly);
	QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
	QCOMPARE(b.read(a, arraySize/2), (qint64) arraySize/2);
	QCOMPARE(b.bytesAvailable(), (qint64) arraySize/2);
	QCOMPARE(b.read(a + arraySize/2, arraySize - arraySize/2),
	(qint64)(arraySize - arraySize/2));
	QVERIFY(b.atEnd());
	QCOMPARE(b.bytesAvailable(), (qint64) 0);
	}

	void tst_QBuffer::readBlockPastEnd()
	{
	QByteArray arr(4096 + 3616, 'd');
	QBuffer buf(&arr);

	buf.open(QIODevice::ReadOnly);
	char dummy[4096];

	buf.read(1);

	QCOMPARE(buf.read(dummy, 4096), qint64(4096));
	QCOMPARE(buf.read(dummy, 4096), qint64(3615));
	QVERIFY(buf.atEnd());
	}

	void tst_QBuffer::writeBlock_data()
	{
	QTest::addColumn<QString>("str");

	QTest::newRow( "small_bytearray" ) << QString("Test");
	QTest::newRow( "large_bytearray" ) << QString(
	"The QBuffer class is an I/O device that operates on a QByteArray.\n"
	"QBuffer is used to read and write to a memory buffer. It is normally "
	"used with a QTextStream or a QDataStream. QBuffer has an associated "
	"QByteArray which holds the buffer data. The size() of the buffer is "
	"automatically adjusted as data is written.\n"
	"The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
	"byte array. The byte array can also be set with setBuffer(). Writing to "
	"the QBuffer will modify the original byte array because QByteArray is "
	"explicitly shared.\n"
	"Use open() to open the buffer before use and to set the mode (read-only, "
	"write-only, etc.). close() closes the buffer. The buffer must be closed "
	"before reopening or calling setBuffer().\n"
	"A common way to use QBuffer is through QDataStream or QTextStream, which "
	"have constructors that take a QBuffer parameter. For convenience, there "
	"are also QDataStream and QTextStream constructors that take a QByteArray "
	"parameter. These constructors create and open an internal QBuffer.\n"
	"Note that QTextStream can also operate on a QString (a Unicode string); a "
	"QBuffer cannot.\n"
	"You can also use QBuffer directly through the standard QIODevice functions "
	"readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
	"See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
	"Classes and Input/Output and Networking.\n\n"
	"The QBuffer class is an I/O device that operates on a QByteArray.\n"
	"QBuffer is used to read and write to a memory buffer. It is normally "
	"used with a QTextStream or a QDataStream. QBuffer has an associated "
	"QByteArray which holds the buffer data. The size() of the buffer is "
	"automatically adjusted as data is written.\n"
	"The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
	"byte array. The byte array can also be set with setBuffer(). Writing to "
	"the QBuffer will modify the original byte array because QByteArray is "
	"explicitly shared.\n"
	"Use open() to open the buffer before use and to set the mode (read-only, "
	"write-only, etc.). close() closes the buffer. The buffer must be closed "
	"before reopening or calling setBuffer().\n"
	"A common way to use QBuffer is through QDataStream or QTextStream, which "
	"have constructors that take a QBuffer parameter. For convenience, there "
	"are also QDataStream and QTextStream constructors that take a QByteArray "
	"parameter. These constructors create and open an internal QBuffer.\n"
	"Note that QTextStream can also operate on a QString (a Unicode string); a "
	"QBuffer cannot.\n"
	"You can also use QBuffer directly through the standard QIODevice functions "
	"readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
	"See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
	"Classes and Input/Output and Networking.\n\n"
	"The QBuffer class is an I/O device that operates on a QByteArray.\n"
	"QBuffer is used to read and write to a memory buffer. It is normally "
	"used with a QTextStream or a QDataStream. QBuffer has an associated "
	"QByteArray which holds the buffer data. The size() of the buffer is "
	"automatically adjusted as data is written.\n"
	"The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
	"byte array. The byte array can also be set with setBuffer(). Writing to "
	"the QBuffer will modify the original byte array because QByteArray is "
	"explicitly shared.\n"
	"Use open() to open the buffer before use and to set the mode (read-only, "
	"write-only, etc.). close() closes the buffer. The buffer must be closed "
	"before reopening or calling setBuffer().\n"
	"A common way to use QBuffer is through QDataStream or QTextStream, which "
	"have constructors that take a QBuffer parameter. For convenience, there "
	"are also QDataStream and QTextStream constructors that take a QByteArray "
	"parameter. These constructors create and open an internal QBuffer.\n"
	"Note that QTextStream can also operate on a QString (a Unicode string); a "
	"QBuffer cannot.\n"
	"You can also use QBuffer directly through the standard QIODevice functions "
	"readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
	"See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
	"Classes and Input/Output and Networking.");
	}

	void tst_QBuffer::writeBlock()
	{
	QFETCH( QString, str );

	QByteArray ba;
	QBuffer buf( &ba );
	buf.open(QIODevice::ReadWrite);
	QByteArray data = str.toLatin1();
	QCOMPARE(buf.write( data.constData(), data.size() ), qint64(data.size()));

	QCOMPARE(buf.data(), str.toLatin1());
	}

	void tst_QBuffer::seek()
	{
	QBuffer buffer;
	buffer.open(QIODevice::WriteOnly);
	QCOMPARE(buffer.size(), qint64(0));
	QCOMPARE(buffer.pos(), qint64(0));
	const qint64 pos = 10;
	QVERIFY(buffer.seek(pos));
	QCOMPARE(buffer.size(), pos);
	}

	void tst_QBuffer::seekTest_data()
	{
	writeBlock_data();
	}

	#define DO_VALID_SEEK(position) { \
	char c; \
	QVERIFY(buf.seek(qint64(position))); \
	QCOMPARE(buf.pos(), qint64(position)); \
	QVERIFY(buf.getChar(&c)); \
	QCOMPARE(QChar(c), str.at(qint64(position))); \
	}
	#define DO_INVALID_SEEK(position) { \
	qint64 prev_pos = buf.pos(); \
	QVERIFY(!buf.seek(qint64(position))); \
	QCOMPARE(buf.pos(), prev_pos); /* position should not be changed */ \
	}

	void tst_QBuffer::seekTest()
	{
	QFETCH(QString, str);

	QByteArray ba;
	QBuffer buf(&ba);
	QCOMPARE(buf.pos(), qint64(0));

	buf.open(QIODevice::ReadWrite);
	QCOMPARE(buf.pos(), qint64(0));
	QCOMPARE(buf.bytesAvailable(), qint64(0));

	QByteArray data = str.toLatin1();
	QCOMPARE(buf.write( data.constData(), data.size() ), qint64(data.size()));
	QCOMPARE(buf.bytesAvailable(), qint64(0)); // we're at the end
	QCOMPARE(buf.size(), qint64(data.size()));

	QTest::ignoreMessage(QtWarningMsg, "QBuffer::seek: Invalid pos: -1");
	DO_INVALID_SEEK(-1);

	DO_VALID_SEEK(0);
	DO_VALID_SEEK(str.size() - 1);
	QVERIFY(buf.atEnd());
	DO_VALID_SEEK(str.size() / 2);

	// Special case: valid to seek one position past the buffer.
	// Its then legal to write, but not read.
	{
	char c = 'a';
	QVERIFY(buf.seek(qint64(str.size())));
	QCOMPARE(buf.bytesAvailable(), qint64(0));
	QCOMPARE(buf.read(&c, qint64(1)), qint64(0));
	QCOMPARE(c, 'a');
	QCOMPARE(buf.write(&c, qint64(1)), qint64(1));
	}

	// Special case 2: seeking to an arbitrary position beyond the buffer auto-expands it
	{
	char c;
	const int offset = 1; // any positive integer will do
	const qint64 pos = buf.size() + offset;
	QVERIFY(buf.seek(pos));
	QCOMPARE(buf.bytesAvailable(), qint64(0));
	QCOMPARE(buf.pos(), pos);
	QVERIFY(!buf.getChar(&c));
	QVERIFY(buf.seek(pos - 1));
	QVERIFY(buf.getChar(&c));
	QCOMPARE(c, buf.data().at(pos - 1));
	QVERIFY(buf.seek(pos));
	QVERIFY(buf.putChar(c));
	}
	}

	void tst_QBuffer::read_rawdata()
	{
	static const unsigned char mydata[] = {
	0x01, 0x00, 0x03, 0x84, 0x78, 0x9c, 0x3b, 0x76,
	0xec, 0x18, 0xc3, 0x31, 0x0a, 0xf1, 0xcc, 0x99,
	0x6d, 0x5b
	};

	QByteArray data = QByteArray::fromRawData((const char *)mydata, sizeof(mydata));
	QBuffer buffer(&data);
	buffer.open(QIODevice::ReadOnly);
	QDataStream in(&buffer);
	quint8 ch;
	for (int i = 0; i < (int)sizeof(mydata); ++i) {
	QVERIFY(!buffer.atEnd());
	in >> ch;
	QCOMPARE(ch, (quint8)mydata[i]);
	}
	QVERIFY(buffer.atEnd());
	}

	void tst_QBuffer::isSequential()
	{
	QBuffer buf;
	QVERIFY(!buf.isSequential());
	}

	void tst_QBuffer::signalTest_data()
	{
	QTest::addColumn<QByteArray>("sample");

	QTest::newRow("empty") << QByteArray();
	QTest::newRow("size 1") << QByteArray("1");
	QTest::newRow("size 2") << QByteArray("11");
	QTest::newRow("size 100") << QByteArray(100, '1');
	}

	void tst_QBuffer::signalTest()
	{
	QFETCH(QByteArray, sample);

	totalBytesWritten = 0;

	QBuffer buf;
	buf.open(QIODevice::WriteOnly);

	buf.buffer().resize(sample.size() * 10);
	connect(&buf, SIGNAL(readyRead()), this, SLOT(readyReadSlot()));
	connect(&buf, SIGNAL(bytesWritten(qint64)), this, SLOT(bytesWrittenSlot(qint64)));

	for (int i = 0; i < 10; ++i) {
	gotReadyRead = false;
	QCOMPARE(buf.write(sample), qint64(sample.size()));
	if (sample.size() > 0) {
	QTestEventLoop::instance().enterLoop(5);
	if (QTestEventLoop::instance().timeout())
	QFAIL("Timed out when waiting for readyRead()");
	QCOMPARE(totalBytesWritten, qint64(sample.size() * (i + 1)));
	QVERIFY(gotReadyRead);
	} else {
	QCOMPARE(totalBytesWritten, qint64(0));
	QVERIFY(!gotReadyRead);
	}
	}
	}

	void tst_QBuffer::readyReadSlot()
	{
	gotReadyRead = true;
	QTestEventLoop::instance().exitLoop();
	}

	void tst_QBuffer::bytesWrittenSlot(qint64 written)
	{
	totalBytesWritten += written;
	}

	void tst_QBuffer::isClosedAfterClose()
	{
	QBuffer buffer;
	buffer.open(QBuffer::ReadOnly);
	QVERIFY(buffer.isOpen());
	buffer.close();
	QVERIFY(!buffer.isOpen());
	}

	void tst_QBuffer::readLine_data()
	{
	QTest::addColumn<QByteArray>("src");
	QTest::addColumn<int>("maxlen");
	QTest::addColumn<QByteArray>("expected");

	QTest::newRow("1") << QByteArray("line1\nline2\n") << 1024
	<< QByteArray("line1\n");
	QTest::newRow("2") << QByteArray("hi there") << 1024
	<< QByteArray("hi there");
	QTest::newRow("3") << QByteArray("l\n") << 3 << QByteArray("l\n");
	QTest::newRow("4") << QByteArray("l\n") << 2 << QByteArray("l");
	}

	void tst_QBuffer::readLine()
	{
	QFETCH(QByteArray, src);
	QFETCH(int, maxlen);
	QFETCH(QByteArray, expected);

	QBuffer buf;
	buf.setBuffer(&src);
	char *result = new char[maxlen + 1];
	result[maxlen] = '\0';

	QVERIFY(buf.open(QIODevice::ReadOnly));

	qint64 bytes_read = buf.readLine(result, maxlen);

	QCOMPARE(bytes_read, qint64(expected.size()));
	QCOMPARE(QByteArray(result), expected);

	buf.close();
	delete[] result;

	}

	void tst_QBuffer::canReadLine_data()
	{
	QTest::addColumn<QByteArray>("src");
	QTest::addColumn<bool>("expected");

	QTest::newRow("1") << QByteArray("no newline") << false;
	QTest::newRow("2") << QByteArray("two \n lines\n") << true;
	QTest::newRow("3") << QByteArray("\n") << true;
	QTest::newRow("4") << QByteArray() << false;
	}

	void tst_QBuffer::canReadLine()
	{
	QFETCH(QByteArray, src);
	QFETCH(bool, expected);

	QBuffer buf;
	buf.setBuffer(&src);
	QVERIFY(!buf.canReadLine());
	QVERIFY(buf.open(QIODevice::ReadOnly));
	QCOMPARE(buf.canReadLine(), expected);
	}

	void tst_QBuffer::atEnd()
	{
	QBuffer buffer;
	buffer.open(QBuffer::Append);
	buffer.write("heisann");
	buffer.close();

	buffer.open(QBuffer::ReadOnly);
	buffer.seek(buffer.size());
	char c;
	QVERIFY(!buffer.getChar(&c));
	QCOMPARE(buffer.read(&c, 1), qint64(0));
	}

	// Test that reading data out of a QBuffer a line at a time gives the same
	// result as reading the whole buffer at once.
	void tst_QBuffer::readLineBoundaries()
	{
	QByteArray line = "This is a line\n";
	QBuffer buffer;
	buffer.open(QIODevice::ReadWrite);
	while (buffer.size() < 16384)
	buffer.write(line);

	buffer.seek(0);
	QByteArray lineByLine;
	while (!buffer.atEnd())
	lineByLine.append(buffer.readLine());

	buffer.seek(0);
	QCOMPARE(buffer.bytesAvailable(), lineByLine.size());

	QByteArray all = buffer.readAll();
	QCOMPARE(all.size(), lineByLine.size());
	QCOMPARE(all, lineByLine);
	}

	// Test that any character in a buffer can be read and pushed back.
	void tst_QBuffer::getAndUngetChar()
	{
	// Create some data in a buffer
	QByteArray line = "This is a line\n";
	QBuffer buffer;
	buffer.open(QIODevice::ReadWrite);
	while (buffer.size() < 16384)
	buffer.write(line);

	// Take a copy of the data held in the buffer
	buffer.seek(0);
	QCOMPARE(buffer.bytesAvailable(), buffer.size());
	QByteArray data = buffer.readAll();
	QCOMPARE(buffer.bytesAvailable(), qint64(0));

	// Get and unget each character in order
	for (qint64 i = 0; i < buffer.size(); ++i) {
	buffer.seek(i);
	char c;
	QVERIFY(buffer.getChar(&c));
	QCOMPARE(c, data.at((uint)i));
	buffer.ungetChar(c);
	}

	// Get and unget each character in reverse order
	for (qint64 i = buffer.size() - 1; i >= 0; --i) {
	buffer.seek(i);
	char c;
	QVERIFY(buffer.getChar(&c));
	QCOMPARE(c, data.at((uint)i));
	buffer.ungetChar(c);
	}

	// Verify that the state of the buffer still matches the original data.
	buffer.seek(0);
	QCOMPARE(buffer.bytesAvailable(), data.size());
	QCOMPARE(buffer.readAll(), data);
	QCOMPARE(buffer.bytesAvailable(), qint64(0));
	}

	void tst_QBuffer::writeAfterQByteArrayResize()
	{
	QBuffer buffer;
	QVERIFY(buffer.open(QIODevice::WriteOnly));

	buffer.write(QByteArray().fill('a', 1000));
	QCOMPARE(buffer.buffer().size(), 1000);

	// resize the QByteArray behind QBuffer's back
	buffer.buffer().clear();
	buffer.seek(0);
	QCOMPARE(buffer.buffer().size(), 0);

	buffer.write(QByteArray().fill('b', 1000));
	QCOMPARE(buffer.buffer().size(), 1000);
	}

	void tst_QBuffer::read_null()
	{
	QByteArray buffer;
	buffer.resize(32000);
	for (int i = 0; i < buffer.size(); ++i)
	buffer[i] = char(i & 0xff);

	QBuffer in(&buffer);
	in.open(QIODevice::ReadOnly);

	QByteArray chunk;

	chunk.resize(16380);
	in.read(chunk.data(), 16380);

	QCOMPARE(chunk, buffer.mid(0, chunk.size()));

	in.read(chunk.data(), 0);

	chunk.resize(8);
	in.read(chunk.data(), chunk.size());

	QCOMPARE(chunk, buffer.mid(16380, chunk.size()));
	}

	QTEST_MAIN(tst_QBuffer)
	#include "tst_qbuffer.moc"