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#include <QtTest/QtTest>

#include <QBuffer>

#include <QByteArray>

//TESTED_CLASS=

//TESTED_FILES=

class tst_QBuffer : public QObject

{

    Q_OBJECT

public:

    tst_QBuffer();

private slots:

    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 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());

}

tst_QBuffer::tst_QBuffer()

{

}

// some status() tests, too

void tst_QBuffer::readBlock()

{

//    QTest::ignoreMessage(QtWarningMsg, "QIODevice::read: File not open");

//    QTest::ignoreMessage(QtWarningMsg, "QIODevice::read: Read operation not permitted");

    const int arraySize = 10;

    char a[arraySize];

    QBuffer b;

    QCOMPARE(b.read(a, arraySize), (qint64) -1); // not opened

    QVERIFY(b.atEnd());

    QByteArray ba;

    ba.resize(arraySize);

    b.setBuffer(&ba);

    b.open(QIODevice::WriteOnly);

    QTest::ignoreMessage(QtWarningMsg, "QIODevice::read: WriteOnly device");

    QCOMPARE(b.read(a, arraySize), (qint64) -1); // no read access

    b.close();

    b.open(QIODevice::ReadOnly);

    QCOMPARE(b.read(a, arraySize), (qint64) arraySize);

    QVERIFY(b.atEnd());

    // 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.read(a, arraySize/2), (qint64) arraySize/2);

    QCOMPARE(b.read(a + arraySize/2, arraySize - arraySize/2),

            (qint64)(arraySize - arraySize/2));

    QVERIFY(b.atEnd());

}

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);

#if 0

    QCOMPARE(buf.pos(), qint64(-1));

#endif

    buf.open(QIODevice::ReadWrite);

    QCOMPARE(buf.pos(), qint64(0));

    QByteArray data = str.toLatin1();

    QCOMPARE(buf.write( data.constData(), data.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.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

    // (see Task 184730)

    {

        char c;

        const int offset = 1;

        Q_ASSERT(offset > 0); // any positive integer will do

        const qint64 pos = buf.size() + offset;

        QVERIFY(buf.seek(pos));

        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;

        QVERIFY(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));

}

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);

    QFile out1("out1.txt");

    out1.open(QFile::WriteOnly);

    out1.write(buffer.readAll());

    out1.close();

*/

    buffer.seek(0);

    char c;

    buffer.getChar(&c);

    buffer.ungetChar(c);

    QFile out2("out2.txt");

    out2.open(QFile::WriteOnly);

    while (!buffer.atEnd())

        out2.write(buffer.readLine());

    out2.close();

    out2.remove();

}

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);