--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/auto/qsocketnotifier/tst_qsocketnotifier.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,241 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 <QtCore/QCoreApplication>
+#include <QtCore/QSocketNotifier>
+#include <QtNetwork/QTcpServer>
+#include <QtNetwork/QTcpSocket>
+#include <private/qnativesocketengine_p.h>
+
+class tst_QSocketNotifier : public QObject
+{
+    Q_OBJECT
+public:
+    tst_QSocketNotifier();
+    ~tst_QSocketNotifier();
+
+private slots:
+    void unexpectedDisconnection();
+    void mixingWithTimers();
+};
+
+tst_QSocketNotifier::tst_QSocketNotifier()
+{ }
+
+tst_QSocketNotifier::~tst_QSocketNotifier()
+{
+}
+
+class UnexpectedDisconnectTester : public QObject
+{
+    Q_OBJECT
+public:
+    QNativeSocketEngine *readEnd1, *readEnd2;
+    int sequence;
+
+    UnexpectedDisconnectTester(QNativeSocketEngine *s1, QNativeSocketEngine *s2)
+        : readEnd1(s1), readEnd2(s2), sequence(0)
+    {
+        QSocketNotifier *notifier1 =
+            new QSocketNotifier(readEnd1->socketDescriptor(), QSocketNotifier::Read, this);
+        connect(notifier1, SIGNAL(activated(int)), SLOT(handleActivated()));
+        QSocketNotifier *notifier2 =
+            new QSocketNotifier(readEnd2->socketDescriptor(), QSocketNotifier::Read, this);
+        connect(notifier2, SIGNAL(activated(int)), SLOT(handleActivated()));
+    }
+
+public slots:
+    void handleActivated()
+    {
+        char data1[1], data2[1];
+        ++sequence;
+        if (sequence == 1) {
+            // read from both ends
+            (void) readEnd1->read(data1, sizeof(data1));
+            (void) readEnd2->read(data2, sizeof(data2));
+            emit finished();
+        } else if (sequence == 2) {
+            // we should never get here
+            QCOMPARE(readEnd2->read(data2, sizeof(data2)), qint64(-2));
+            QVERIFY(readEnd2->isValid());
+        }
+    }
+
+signals:
+    void finished();
+};
+
+void tst_QSocketNotifier::unexpectedDisconnection()
+{
+    /*
+      Given two sockets and two QSocketNotifiers registered on each
+      their socket. If both sockets receive data, and the first slot
+      invoked by one of the socket notifiers empties both sockets, the
+      other notifier will also emit activated(). This results in
+      unexpected disconnection in QAbstractSocket.
+
+      The use case is that somebody calls one of the
+      waitFor... functions in a QSocketNotifier activated slot, and
+      the waitFor... functions do local selects that can empty both
+      stdin and stderr while waiting for fex bytes to be written.
+    */
+
+    QTcpServer server;
+    QVERIFY(server.listen(QHostAddress::LocalHost, 0));
+
+    QNativeSocketEngine readEnd1;
+    readEnd1.initialize(QAbstractSocket::TcpSocket);
+    bool b = readEnd1.connectToHost(server.serverAddress(), server.serverPort());
+    QVERIFY(readEnd1.waitForWrite());
+//    while (!b && readEnd1.state() != QAbstractSocket::ConnectedState)
+//        b = readEnd1.connectToHost(server.serverAddress(), server.serverPort());
+    QVERIFY(readEnd1.state() == QAbstractSocket::ConnectedState);
+    QVERIFY(server.waitForNewConnection());
+    QTcpSocket *writeEnd1 = server.nextPendingConnection();
+    QVERIFY(writeEnd1 != 0);
+
+    QNativeSocketEngine readEnd2;
+    readEnd2.initialize(QAbstractSocket::TcpSocket);
+    b = readEnd2.connectToHost(server.serverAddress(), server.serverPort());
+    QVERIFY(readEnd2.waitForWrite());
+//    while (!b)
+//        b = readEnd2.connectToHost(server.serverAddress(), server.serverPort());
+    QVERIFY(readEnd2.state() == QAbstractSocket::ConnectedState);
+    QVERIFY(server.waitForNewConnection());
+    QTcpSocket *writeEnd2 = server.nextPendingConnection();
+    QVERIFY(writeEnd2 != 0);
+
+    writeEnd1->write("1", 1);
+    writeEnd2->write("2", 1);
+
+    writeEnd1->waitForBytesWritten();
+    writeEnd2->waitForBytesWritten();
+
+    writeEnd1->flush();
+    writeEnd2->flush();
+
+    UnexpectedDisconnectTester tester(&readEnd1, &readEnd2);
+
+    do {
+        // we have to wait until sequence value changes
+        // as any event can make us jump out processing
+        QCoreApplication::processEvents(QEventLoop::WaitForMoreEvents);
+    }  while(tester.sequence <= 0);
+
+    QVERIFY(readEnd1.state() == QAbstractSocket::ConnectedState);
+    QVERIFY(readEnd2.state() == QAbstractSocket::ConnectedState);
+
+    QCOMPARE(tester.sequence, 2);
+
+    readEnd1.close();
+    readEnd2.close();
+    writeEnd1->close();
+    writeEnd2->close();
+    server.close();
+}
+
+class MixingWithTimersHelper : public QObject
+{
+    Q_OBJECT
+
+public:
+    MixingWithTimersHelper(QTimer *timer, QTcpServer *server);
+
+    bool timerActivated;
+    bool socketActivated;
+
+private slots:
+    void timerFired();
+    void socketFired();
+};
+
+MixingWithTimersHelper::MixingWithTimersHelper(QTimer *timer, QTcpServer *server)
+{
+    timerActivated = false;
+    socketActivated = false;
+
+    connect(timer, SIGNAL(timeout()), SLOT(timerFired()));
+    connect(server, SIGNAL(newConnection()), SLOT(socketFired()));
+}
+
+void MixingWithTimersHelper::timerFired()
+{
+    timerActivated = true;
+}
+
+void MixingWithTimersHelper::socketFired()
+{
+    socketActivated = true;
+}
+
+void tst_QSocketNotifier::mixingWithTimers()
+{
+    QTimer timer;
+    timer.setInterval(0);
+    timer.start();
+
+    QTcpServer server;
+    QVERIFY(server.listen(QHostAddress::LocalHost, 0));
+
+    MixingWithTimersHelper helper(&timer, &server);
+
+    QCoreApplication::processEvents();
+
+    QCOMPARE(helper.timerActivated, true);
+    QCOMPARE(helper.socketActivated, false);
+
+    helper.timerActivated = false;
+    helper.socketActivated = false;
+
+    QTcpSocket socket;
+    socket.connectToHost(server.serverAddress(), server.serverPort());
+
+    QCoreApplication::processEvents();
+
+    QCOMPARE(helper.timerActivated, true);
+    QCOMPARE(helper.socketActivated, true);
+}
+
+QTEST_MAIN(tst_QSocketNotifier)
+#include <tst_qsocketnotifier.moc>