Long live Qt 4.5!

3 files changed, 897 insertions, 0 deletions

diff --git a/tests/auto/qfuturewatcher/.gitignore b/tests/auto/qfuturewatcher/.gitignore
new file mode 100644
index 0000000..1d77843
--- /dev/null
+++ b/tests/auto/qfuturewatcher/.gitignore
@@ -0,0 +1 @@
+tst_qfuturewatcher
diff --git a/tests/auto/qfuturewatcher/qfuturewatcher.pro b/tests/auto/qfuturewatcher/qfuturewatcher.pro
new file mode 100644
index 0000000..79d8739
--- /dev/null
+++ b/tests/auto/qfuturewatcher/qfuturewatcher.pro
@@ -0,0 +1,3 @@
+load(qttest_p4)
+SOURCES += tst_qfuturewatcher.cpp 
+QT = core
diff --git a/tests/auto/qfuturewatcher/tst_qfuturewatcher.cpp b/tests/auto/qfuturewatcher/tst_qfuturewatcher.cpp
new file mode 100644
index 0000000..1c76b0d
--- /dev/null
+++ b/tests/auto/qfuturewatcher/tst_qfuturewatcher.cpp
@@ -0,0 +1,893 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QCoreApplication>
+#include <QDebug>
+#include <QtTest/QtTest>
+
+#include <qfuture.h>
+#include "../qfuture/versioncheck.h"
+#include <qfuturewatcher.h>
+#include <qtconcurrentrun.h>
+#include <qtconcurrentmap.h>
+
+#ifndef QT_NO_CONCURRENT_TEST
+#include <private/qfutureinterface_p.h>
+
+using namespace QtConcurrent;
+
+#include <QtTest/QtTest>
+
+//#define PRINT
+
+class tst_QFutureWatcher: public QObject
+{
+    Q_OBJECT
+private slots:
+    void startFinish();
+    void progressValueChanged();
+    void canceled();
+    void resultAt();
+    void resultReadyAt();
+    void futureSignals();
+    void watchFinishedFuture();
+    void watchCanceledFuture();
+    void disconnectRunningFuture();
+    void toMuchProgress();
+    void progressText();
+    void sharedFutureInterface();
+    void changeFuture();
+    void cancelEvents();
+    void pauseEvents();
+    void finishedState();
+    void throttling();
+    void incrementalMapResults();
+    void incrementalFilterResults();
+    void qfutureSynchornizer();
+};
+
+QTEST_MAIN(tst_QFutureWatcher)
+
+void sleeper()
+{
+    QTest::qSleep(100);
+}
+
+void tst_QFutureWatcher::startFinish()
+{
+    QFutureWatcher<void> futureWatcher;
+
+    QSignalSpy started(&futureWatcher, SIGNAL(started()));
+    QSignalSpy finished(&futureWatcher, SIGNAL(finished()));
+
+    futureWatcher.setFuture(QtConcurrent::run(sleeper));
+    QTest::qWait(10); // spin the event loop to deliver queued signals.
+    QCOMPARE(started.count(), 1);
+    QCOMPARE(finished.count(), 0);
+    futureWatcher.future().waitForFinished();
+    QTest::qWait(10);
+    QCOMPARE(started.count(), 1);
+    QCOMPARE(finished.count(), 1);
+}
+
+void mapSleeper(int &)
+{
+    QTest::qSleep(100);
+}
+
+QSet<int> progressValues;
+QSet<QString> progressTexts;
+QMutex mutex;
+class ProgressObject : public QObject
+{
+Q_OBJECT
+public slots:
+    void printProgress(int);
+    void printText(const QString &text);
+    void registerProgress(int);
+    void registerText(const QString &text);
+};
+
+void ProgressObject::printProgress(int progress)
+{
+    qDebug() << "thread" << QThread::currentThread() << "reports progress" << progress;
+}
+
+void ProgressObject::printText(const QString &text)
+{
+    qDebug() << "thread" << QThread::currentThread() << "reports progress text" << text;
+}
+
+void ProgressObject::registerProgress(int progress)
+{
+    QTest::qSleep(1);
+    progressValues.insert(progress);
+}
+
+void ProgressObject::registerText(const QString &text)
+{
+    QTest::qSleep(1);
+    progressTexts.insert(text);
+}
+
+
+QList<int> createList(int listSize)
+{
+    QList<int> list;
+    for (int i = 0; i < listSize; ++i) {
+        list.append(i);
+    }
+    return list;
+}
+
+void tst_QFutureWatcher::progressValueChanged()
+{
+#ifdef PRINT
+    qDebug() << "main thread" << QThread::currentThread();
+#endif
+
+    progressValues.clear();
+    const int listSize = 20;
+    QList<int> list = createList(listSize);
+
+    QFutureWatcher<void> futureWatcher;
+    ProgressObject progressObject;
+    QObject::connect(&futureWatcher, SIGNAL(finished()), &QTestEventLoop::instance(), SLOT(exitLoop()));
+#ifdef PRINT
+    QObject::connect(&futureWatcher, SIGNAL(progressValueChanged(int)), &progressObject, SLOT(printProgress(int)), Qt::DirectConnection );
+#endif
+    QObject::connect(&futureWatcher, SIGNAL(progressValueChanged(int)), &progressObject, SLOT(registerProgress(int)));
+
+    futureWatcher.setFuture(QtConcurrent::map(list, mapSleeper));
+
+    QTestEventLoop::instance().enterLoop(5);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+    futureWatcher.disconnect();
+    QVERIFY(progressValues.contains(0));
+    QVERIFY(progressValues.contains(listSize));
+}
+
+class CancelObject : public QObject
+{
+Q_OBJECT
+public:
+    bool wasCanceled;
+    CancelObject() : wasCanceled(false) {};
+public slots:
+    void cancel();
+};
+
+void CancelObject::cancel()
+{
+#ifdef PRINT
+    qDebug() << "thread" << QThread::currentThread() << "reports canceled";
+#endif
+    wasCanceled = true;
+}
+
+void tst_QFutureWatcher::canceled()
+{
+    const int listSize = 20;
+    QList<int> list = createList(listSize);
+
+    QFutureWatcher<void> futureWatcher;
+    QFuture<void> future;
+    CancelObject cancelObject;
+
+    QObject::connect(&futureWatcher, SIGNAL(canceled()), &cancelObject, SLOT(cancel()));
+    QObject::connect(&futureWatcher, SIGNAL(canceled()),
+        &QTestEventLoop::instance(), SLOT(exitLoop()), Qt::QueuedConnection);
+
+    future = QtConcurrent::map(list, mapSleeper);
+    futureWatcher.setFuture(future);
+    futureWatcher.cancel();
+    QTestEventLoop::instance().enterLoop(5);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+
+    QVERIFY(future.isCanceled());
+    QVERIFY(cancelObject.wasCanceled);
+    futureWatcher.disconnect();
+    future.waitForFinished();
+}
+
+class IntTask : public RunFunctionTask<int>
+{
+public:
+    void runFunctor()
+    {
+        result = 10;
+    }
+};
+
+void tst_QFutureWatcher::resultAt()
+{
+    QFutureWatcher<int> futureWatcher;
+    futureWatcher.setFuture((new IntTask())->start());
+    futureWatcher.waitForFinished();
+    QCOMPARE(futureWatcher.result(), 10);
+    QCOMPARE(futureWatcher.resultAt(0), 10);
+}
+
+void tst_QFutureWatcher::resultReadyAt()
+{
+    QFutureWatcher<int> futureWatcher;
+    QObject::connect(&futureWatcher, SIGNAL(resultReadyAt(int)), &QTestEventLoop::instance(), SLOT(exitLoop()), Qt::QueuedConnection);
+
+    QFuture<int> future = (new IntTask())->start();
+    futureWatcher.setFuture(future);
+
+    QTestEventLoop::instance().enterLoop(1);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+
+    // Setting the future again should give us another signal.
+    // (this is to prevent the race where the task associated
+    // with the future finishes before setFuture is called.)
+    futureWatcher.setFuture(QFuture<int>());
+    futureWatcher.setFuture(future);
+
+    QTestEventLoop::instance().enterLoop(1);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+}
+
+class SignalSlotObject : public QObject
+{
+Q_OBJECT
+
+signals:
+    void cancel();
+
+public slots:
+    void started()
+    {
+        qDebug() << "started called";
+    }
+
+    void finished()
+    {
+        qDebug() << "finished called";
+    }
+
+    void canceled()
+    {
+        qDebug() << "canceled called";
+    }
+
+#ifdef PRINT
+    void resultReadyAt(int index)
+    {
+        qDebug() << "result" << index << "ready";
+    }
+#else
+    void resultReadyAt(int) { }
+#endif
+    void progressValueChanged(int progress)
+    {
+        qDebug() << "progress" << progress;
+    }
+
+    void progressRangeChanged(int min, int max)
+    {
+        qDebug() << "progress range" << min << max;
+    }
+
+};
+
+void tst_QFutureWatcher::futureSignals()
+{
+    {
+        QFutureInterface<int> a;
+        QFutureWatcher<int> f;
+
+        SignalSlotObject object;
+#ifdef PRINT
+        connect(&f, SIGNAL(finished()), &object, SLOT(finished()));
+        connect(&f, SIGNAL(progressValueChanged(int)), &object, SLOT(progressValueChanged(int)));
+#endif
+        // must connect to resultReadyAt so that the watcher can detect the connection
+        // (QSignalSpy does not trigger it.)
+        connect(&f, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+        a.reportStarted();
+        f.setFuture(a.future());
+
+        QSignalSpy progressSpy(&f, SIGNAL(progressValueChanged(int)));
+        const int progress = 1;
+        a.setProgressValue(progress);
+        QTest::qWait(10);
+        QCOMPARE(progressSpy.count(), 2);
+        QCOMPARE(progressSpy.takeFirst().at(0).toInt(), 0);
+        QCOMPARE(progressSpy.takeFirst().at(0).toInt(), 1);
+
+        QSignalSpy finishedSpy(&f, SIGNAL(finished()));
+        QSignalSpy resultReadySpy(&f, SIGNAL(resultReadyAt(int)));
+
+        const int result = 10;
+        a.reportResult(&result);
+        QTest::qWait(10);
+        QCOMPARE(resultReadySpy.count(), 1);
+        a.reportFinished(&result);
+        QTest::qWait(10);
+
+        QCOMPARE(resultReadySpy.count(), 2);
+        QCOMPARE(resultReadySpy.takeFirst().at(0).toInt(), 0); // check the index
+        QCOMPARE(resultReadySpy.takeFirst().at(0).toInt(), 1);
+
+        QCOMPARE(finishedSpy.count(), 1);
+    }
+}
+
+void tst_QFutureWatcher::watchFinishedFuture()
+{
+    QFutureInterface<int> iface;
+    iface.reportStarted();
+
+    QFuture<int> f = iface.future();
+
+    int value = 100;
+    iface.reportFinished(&value);
+
+    QFutureWatcher<int> watcher;
+
+    SignalSlotObject object;
+#ifdef PRINT
+    connect(&watcher, SIGNAL(started()), &object, SLOT(started()));
+    connect(&watcher, SIGNAL(canceled()), &object, SLOT(canceled()));
+    connect(&watcher, SIGNAL(finished()), &object, SLOT(finished()));
+    connect(&watcher, SIGNAL(progressValueChanged(int)), &object, SLOT(progressValueChanged(int)));
+    connect(&watcher, SIGNAL(progressRangeChanged(int, int)), &object, SLOT(progressRangeChanged(int, int)));
+#endif
+    connect(&watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+
+    QSignalSpy startedSpy(&watcher, SIGNAL(started()));
+    QSignalSpy finishedSpy(&watcher, SIGNAL(finished()));
+    QSignalSpy resultReadySpy(&watcher, SIGNAL(resultReadyAt(int)));
+    QSignalSpy canceledSpy(&watcher, SIGNAL(canceled()));
+
+    watcher.setFuture(f);
+    QTest::qWait(10);
+
+    QCOMPARE(startedSpy.count(), 1);
+    QCOMPARE(finishedSpy.count(), 1);
+    QCOMPARE(resultReadySpy.count(), 1);
+    QCOMPARE(canceledSpy.count(), 0);
+}
+
+void tst_QFutureWatcher::watchCanceledFuture()
+{
+    QFuture<int> f;
+    QFutureWatcher<int> watcher;
+
+    SignalSlotObject object;
+#ifdef PRINT
+    connect(&watcher, SIGNAL(started()), &object, SLOT(started()));
+    connect(&watcher, SIGNAL(canceled()), &object, SLOT(canceled()));
+    connect(&watcher, SIGNAL(finished()), &object, SLOT(finished()));
+    connect(&watcher, SIGNAL(progressValueChanged(int)), &object, SLOT(progressValueChanged(int)));
+    connect(&watcher, SIGNAL(progressRangeChanged(int, int)), &object, SLOT(progressRangeChanged(int, int)));
+#endif
+    connect(&watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+
+    QSignalSpy startedSpy(&watcher, SIGNAL(started()));
+    QSignalSpy finishedSpy(&watcher, SIGNAL(finished()));
+    QSignalSpy resultReadySpy(&watcher, SIGNAL(resultReadyAt(int)));
+    QSignalSpy canceledSpy(&watcher, SIGNAL(canceled()));
+
+    watcher.setFuture(f);
+    QTest::qWait(10);
+
+    QCOMPARE(startedSpy.count(), 1);
+    QCOMPARE(finishedSpy.count(), 1);
+    QCOMPARE(resultReadySpy.count(), 0);
+    QCOMPARE(canceledSpy.count(), 1);
+}
+
+void tst_QFutureWatcher::disconnectRunningFuture()
+{
+    QFutureInterface<int> a;
+    a.reportStarted();
+
+    QFuture<int> f = a.future();
+    QFutureWatcher<int> *watcher = new QFutureWatcher<int>();
+    watcher->setFuture(f);
+
+    SignalSlotObject object;
+    connect(watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+
+    QSignalSpy finishedSpy(watcher, SIGNAL(finished()));
+    QSignalSpy resultReadySpy(watcher, SIGNAL(resultReadyAt(int)));
+
+    const int result = 10;
+    a.reportResult(&result);
+    QTest::qWait(10);
+    QCOMPARE(resultReadySpy.count(), 1);
+
+    delete watcher;
+
+    a.reportResult(&result);
+    QTest::qWait(10);
+    QCOMPARE(resultReadySpy.count(), 1);
+
+    a.reportFinished(&result);
+    QTest::qWait(10);
+    QCOMPARE(finishedSpy.count(), 0);
+}
+
+const int maxProgress = 100000;
+class ProgressEmitterTask : public RunFunctionTask<void>
+{
+public:
+    void runFunctor()
+    {
+        setProgressRange(0, maxProgress);
+        for (int p = 0; p <= maxProgress; ++p)
+            setProgressValue(p);
+    }
+};
+
+void tst_QFutureWatcher::toMuchProgress()
+{
+    progressValues.clear();
+    ProgressObject o;
+
+    QFutureWatcher<void> f;
+    f.setFuture((new ProgressEmitterTask())->start());
+    QObject::connect(&f, SIGNAL(finished()), &QTestEventLoop::instance(), SLOT(exitLoop()));
+#ifdef PRINT
+    QObject::connect(&f, SIGNAL(progressValueChanged(int)), &o, SLOT(printProgress(int)));
+#endif
+    QObject::connect(&f, SIGNAL(progressValueChanged(int)), &o, SLOT(registerProgress(int)));
+
+    QTestEventLoop::instance().enterLoop(5);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+    QVERIFY(progressValues.contains(maxProgress));
+}
+
+template <typename T>
+class ProgressTextTask : public RunFunctionTask<T>
+{
+public:
+    void runFunctor()
+    {
+        while (this->isProgressUpdateNeeded() == false)
+            QTest::qSleep(1);
+        this->setProgressValueAndText(1, QLatin1String("Foo 1"));
+
+        while (this->isProgressUpdateNeeded() == false)
+            QTest::qSleep(1);
+        this->setProgressValueAndText(2, QLatin1String("Foo 2"));
+
+        while (this->isProgressUpdateNeeded() == false)
+            QTest::qSleep(1);
+        this->setProgressValueAndText(3, QLatin1String("Foo 3"));
+    }
+};
+
+void tst_QFutureWatcher::progressText()
+{
+    {   // instantiate API for T=int and T=void.
+        ProgressTextTask<int> a;
+        ProgressTextTask<void> b;
+    }
+    {
+        progressValues.clear();
+        progressTexts.clear();
+        QFuture<int> f = ((new ProgressTextTask<int>())->start());
+        QFutureWatcher<int> watcher;
+        ProgressObject o;
+        QObject::connect(&watcher, SIGNAL(finished()), &QTestEventLoop::instance(), SLOT(exitLoop()));
+#ifdef PRINT
+        QObject::connect(&watcher, SIGNAL(progressValueChanged(int)), &o, SLOT(printProgress(int)));
+        QObject::connect(&watcher, SIGNAL(progressTextChanged(const QString &)), &o, SLOT(printText(const QString &)));
+#endif
+        QObject::connect(&watcher, SIGNAL(progressValueChanged(int)), &o, SLOT(registerProgress(int)));
+        QObject::connect(&watcher, SIGNAL(progressTextChanged(const QString &)), &o, SLOT(registerText(const QString &)));
+
+        watcher.setFuture(f);
+        QTestEventLoop::instance().enterLoop(5);
+        QVERIFY(!QTestEventLoop::instance().timeout());
+
+        QCOMPARE(f.progressText(), QLatin1String("Foo 3"));
+        QCOMPARE(f.progressValue(), 3);
+        QVERIFY(progressValues.contains(1));
+        QVERIFY(progressValues.contains(2));
+        QVERIFY(progressValues.contains(3));
+        QVERIFY(progressTexts.contains(QLatin1String("Foo 1")));
+        QVERIFY(progressTexts.contains(QLatin1String("Foo 2")));
+        QVERIFY(progressTexts.contains(QLatin1String("Foo 3")));
+    }
+}
+
+template <typename T>
+void callInterface(T &obj)
+{
+    obj.progressValue();
+    obj.progressMinimum();
+    obj.progressMaximum();
+    obj.progressText();
+
+    obj.isStarted();
+    obj.isFinished();
+    obj.isRunning();
+    obj.isCanceled();
+    obj.isPaused();
+
+    obj.cancel();
+    obj.pause();
+    obj.resume();
+    obj.togglePaused();
+    obj.waitForFinished();
+
+    const T& objConst = obj;
+    objConst.progressValue();
+    objConst.progressMinimum();
+    objConst.progressMaximum();
+    objConst.progressText();
+
+    objConst.isStarted();
+    objConst.isFinished();
+    objConst.isRunning();
+    objConst.isCanceled();
+    objConst.isPaused();
+}
+
+template <typename T>
+void callInterface(const T &obj)
+{
+    obj.result();
+    obj.resultAt(0);
+}
+
+
+// QFutureWatcher and QFuture has a similar interface. Test
+// that the functions we want ot have in both are actually
+// there.
+void tst_QFutureWatcher::sharedFutureInterface()
+{
+    QFutureInterface<int> iface;
+    iface.reportStarted();
+
+    QFuture<int> intFuture = iface.future();
+
+    int value = 0;
+    iface.reportFinished(&value);
+
+    QFuture<void> voidFuture;
+    QFutureWatcher<int> intWatcher;
+    intWatcher.setFuture(intFuture);
+    QFutureWatcher<void> voidWatcher;
+
+    callInterface(intFuture);
+    callInterface(voidFuture);
+    callInterface(intWatcher);
+    callInterface(voidWatcher);
+
+    callInterface(intFuture);
+    callInterface(intWatcher);
+}
+
+void tst_QFutureWatcher::changeFuture()
+{
+    QFutureInterface<int> iface;
+    iface.reportStarted();
+
+    QFuture<int> a = iface.future();
+
+    int value = 0;
+    iface.reportFinished(&value);
+
+    QFuture<int> b;
+
+    QFutureWatcher<int> watcher;
+
+    SignalSlotObject object;
+    connect(&watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+    QSignalSpy resultReadySpy(&watcher, SIGNAL(resultReadyAt(int)));
+
+    watcher.setFuture(a); // Watch 'a' which will genere a resultReady event.
+    watcher.setFuture(b); // But oh no! we're switching to another future
+    QTest::qWait(10);     // before the event gets delivered.
+
+    QCOMPARE(resultReadySpy.count(), 0);
+
+    watcher.setFuture(a);
+    watcher.setFuture(b);
+    watcher.setFuture(a); // setting it back gets us one event, not two.
+    QTest::qWait(10);
+
+    QCOMPARE(resultReadySpy.count(), 1);
+}
+
+// Test that events aren't delivered from canceled futures
+void tst_QFutureWatcher::cancelEvents()
+{
+    QFutureInterface<int> iface;
+    iface.reportStarted();
+
+    QFuture<int> a = iface.future();
+
+    int value = 0;
+    iface.reportFinished(&value);
+
+    QFutureWatcher<int> watcher;
+
+    SignalSlotObject object;
+    connect(&watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+    QSignalSpy resultReadySpy(&watcher, SIGNAL(resultReadyAt(int)));
+
+    watcher.setFuture(a);
+    watcher.cancel();
+
+    QTest::qWait(10);
+
+    QCOMPARE(resultReadySpy.count(), 0);
+}
+
+// Tests that events from paused futures are saved and
+// delivered on resume.
+void tst_QFutureWatcher::pauseEvents()
+{
+    {
+        QFutureInterface<int> iface;
+        iface.reportStarted();
+
+        QFuture<int> a = iface.future();
+
+        int value = 0;
+        iface.reportFinished(&value);
+
+        QFutureWatcher<int> watcher;
+
+        SignalSlotObject object;
+        connect(&watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+        QSignalSpy resultReadySpy(&watcher, SIGNAL(resultReadyAt(int)));
+
+        watcher.setFuture(a);
+        watcher.pause();
+
+        QTest::qWait(10);
+        QCOMPARE(resultReadySpy.count(), 0);
+
+        watcher.resume();
+        QTest::qWait(10);
+        QCOMPARE(resultReadySpy.count(), 1);
+    }
+    {
+        QFutureInterface<int> iface;
+        iface.reportStarted();
+
+        QFuture<int> a = iface.future();
+
+        int value = 0;
+        iface.reportFinished(&value);
+
+        QFutureWatcher<int> watcher;
+
+        SignalSlotObject object;
+        connect(&watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+        QSignalSpy resultReadySpy(&watcher, SIGNAL(resultReadyAt(int)));
+
+        watcher.setFuture(a);
+        a.pause();
+
+        QFuture<int> b;
+        watcher.setFuture(b); // If we watch b instead, resuming a
+        a.resume();           // should give us no results.
+
+        QTest::qWait(10);
+        QCOMPARE(resultReadySpy.count(), 0);
+    }
+}
+
+// Test that the finished state for the watcher gets
+// set when the finished event is delivered.
+// This means it will lag the finished state for the future,
+// but makes it more useful.
+void tst_QFutureWatcher::finishedState()
+{
+    QFutureInterface<int> iface;
+    iface.reportStarted();
+    QFuture<int> future = iface.future();
+    QFutureWatcher<int> watcher;
+
+    watcher.setFuture(future);
+    QTest::qWait(10);
+
+    iface.reportFinished();
+    QVERIFY(future.isFinished());
+    QVERIFY(watcher.isFinished() == false);
+
+    QTest::qWait(10);
+    QVERIFY(watcher.isFinished());
+}
+
+/*
+    Verify that throttling kicks in if you report a lot of results,
+    and that it clears when the result events are processed.
+*/
+void tst_QFutureWatcher::throttling()
+{
+    QFutureInterface<int> iface;
+    iface.reportStarted();
+    QFuture<int> future = iface.future();
+    QFutureWatcher<int> watcher;
+    watcher.setFuture(future);
+
+    QVERIFY(iface.isThrottled() == false);
+
+    for (int i = 0; i < 1000; ++i) {
+        int result = 0;
+        iface.reportResult(result);
+    }
+
+    QVERIFY(iface.isThrottled() == true);
+
+    QTest::qWait(100); // process events.
+
+    QVERIFY(iface.isThrottled() == false);
+
+    iface.reportFinished();
+}
+
+int mapper(const int &i)
+{
+    return i;
+}
+
+class ResultReadyTester : public QObject
+{
+Q_OBJECT
+public:
+    ResultReadyTester(QFutureWatcher<int> *watcher)
+    :m_watcher(watcher), filter(false), ok(true), count(0)
+    {
+        
+    }
+public slots:
+    void resultReadyAt(int index)
+    {
+        ++count;
+        if (m_watcher->future().isResultReadyAt(index) == false)
+            ok = false;
+        if (!filter && m_watcher->future().resultAt(index) != index)
+            ok = false;
+        if (filter && m_watcher->future().resultAt(index) != index * 2 + 1)
+            ok = false;
+    }
+public:
+    QFutureWatcher<int> *m_watcher;
+    bool filter;
+    bool ok;
+    int count;
+};
+
+void tst_QFutureWatcher::incrementalMapResults()
+{
+    QFutureWatcher<int> watcher;
+
+    SignalSlotObject object;
+#ifdef PRINT
+    connect(&watcher, SIGNAL(finished()), &object, SLOT(finished()));
+    connect(&watcher, SIGNAL(progressValueChanged(int)), &object, SLOT(progressValueChanged(int)));
+    connect(&watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+#endif
+
+    QObject::connect(&watcher, SIGNAL(finished()), &QTestEventLoop::instance(), SLOT(exitLoop()));
+
+    ResultReadyTester resultReadyTester(&watcher);
+    connect(&watcher, SIGNAL(resultReadyAt(int)), &resultReadyTester, SLOT(resultReadyAt(int)));
+
+    const int count = 10000;
+    QList<int> ints; 
+    for (int i = 0; i < count; ++i)
+        ints << i;
+
+    QFuture<int> future = QtConcurrent::mapped(ints, mapper);
+    watcher.setFuture(future);
+
+    QTestEventLoop::instance().enterLoop(10);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+    QCOMPARE(resultReadyTester.count, count);
+    QVERIFY(resultReadyTester.ok);
+    QVERIFY(watcher.isFinished());
+    future.waitForFinished(); 
+}
+
+bool filterer(int i)
+{
+    return (i % 2);
+}
+
+void tst_QFutureWatcher::incrementalFilterResults()
+{
+    QFutureWatcher<int> watcher;
+
+    SignalSlotObject object;
+#ifdef PRINT
+    connect(&watcher, SIGNAL(finished()), &object, SLOT(finished()));
+    connect(&watcher, SIGNAL(progressValueChanged(int)), &object, SLOT(progressValueChanged(int)));
+    connect(&watcher, SIGNAL(resultReadyAt(int)), &object, SLOT(resultReadyAt(int)));
+#endif
+
+    QObject::connect(&watcher, SIGNAL(finished()), &QTestEventLoop::instance(), SLOT(exitLoop()));
+
+
+    ResultReadyTester resultReadyTester(&watcher);
+    resultReadyTester.filter = true;
+    connect(&watcher, SIGNAL(resultReadyAt(int)), &resultReadyTester, SLOT(resultReadyAt(int)));
+
+    const int count = 10000;
+    QList<int> ints; 
+    for (int i = 0; i < count; ++i)
+        ints << i;
+
+    QFuture<int> future = QtConcurrent::filtered(ints, filterer);
+    watcher.setFuture(future);
+
+    QTestEventLoop::instance().enterLoop(10);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+    QCOMPARE(resultReadyTester.count, count / 2);
+    QVERIFY(resultReadyTester.ok);
+    QVERIFY(watcher.isFinished());
+    future.waitForFinished(); 
+}
+
+void tst_QFutureWatcher::qfutureSynchornizer()
+{
+    int taskCount = 1000; 
+    QTime t;
+    t.start();
+
+    {
+        QFutureSynchronizer<void> sync;
+
+        sync.setCancelOnWait(true);
+        for (int i = 0; i < taskCount; ++i) {
+            sync.addFuture(run(sleeper));
+        }
+    }
+
+    // Test that we're not running each task.
+    QVERIFY(t.elapsed() < taskCount * 10);
+}
+
+#include "tst_qfuturewatcher.moc"
+
+#else
+QTEST_NOOP_MAIN
+#endif