--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/auto/exceptionsafety/tst_exceptionsafety.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,727 @@
+/****************************************************************************
+**
+** 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>
+
+QT_USE_NAMESPACE
+
+#if defined(QT_NO_EXCEPTIONS)
+ QTEST_NOOP_MAIN
+#else
+class tst_ExceptionSafety: public QObject
+{
+ Q_OBJECT
+private slots:
+ void exceptionInSlot();
+ void exceptionVector();
+ void exceptionHash();
+ void exceptionMap();
+ void exceptionList();
+ void exceptionLinkedList();
+// void exceptionEventLoop();
+// void exceptionSignalSlot();
+};
+
+class Emitter : public QObject
+{
+ Q_OBJECT
+public:
+ inline void emitTestSignal() { emit testSignal(); }
+signals:
+ void testSignal();
+};
+
+class ExceptionThrower : public QObject
+{
+ Q_OBJECT
+public slots:
+ void thrower() { throw 5; }
+};
+
+class Receiver : public QObject
+{
+ Q_OBJECT
+public:
+ Receiver()
+ : received(0) {}
+ int received;
+
+public slots:
+ void receiver() { ++received; }
+};
+
+enum ThrowType { ThrowNot = 0, ThrowAtCreate = 1, ThrowAtCopy = 2, ThrowLater = 3, ThrowAtComparison = 4 };
+
+ThrowType throwType = ThrowNot; // global flag to indicate when an exception should be throw. Will be reset when the exception has been generated.
+
+int objCounter = 0;
+
+/*! Class that does not throw any exceptions. Used as baseclass for all the other ones.
+ */
+template <int T>
+class FlexibleThrower
+{
+ public:
+ FlexibleThrower() : _value(-1) {
+ if( throwType == ThrowAtCreate ) {
+ throwType = ThrowNot;
+ throw ThrowAtCreate;
+ }
+ objCounter++;
+ }
+
+ FlexibleThrower( short value ) : _value(value) {
+ if( throwType == ThrowAtCreate ) {
+ throwType = ThrowNot;
+ throw ThrowAtCreate;
+ }
+ objCounter++;
+ }
+
+ FlexibleThrower(FlexibleThrower const& other ) {
+ // qDebug("cc");
+
+ if( throwType == ThrowAtCopy ) {
+ throwType = ThrowNot;
+ throw ThrowAtCopy;
+
+ } else if( throwType == ThrowLater ) {
+ throwType = ThrowAtCopy;
+ }
+
+ objCounter++;
+ _value = other.value();
+ }
+
+ ~FlexibleThrower() { objCounter--; }
+
+ bool operator==(const FlexibleThrower<T> &t) const
+ {
+ // qDebug("vv == %d %d", value(), t.value());
+ if( throwType == ThrowAtComparison ) {
+ throwType = ThrowNot;
+ throw ThrowAtComparison;
+ }
+ return value()==t.value();
+ }
+
+ bool operator<(const FlexibleThrower<T> &t) const
+ {
+ // qDebug("vv < %d %d", value(), t.value());
+ if( throwType == ThrowAtComparison ) {
+ throwType = ThrowNot;
+ throw ThrowAtComparison;
+ }
+ return value()<t.value();
+ }
+
+ int value() const
+ { return (int)_value; }
+
+ short _value;
+ char dummy[T];
+};
+
+uint qHash(const FlexibleThrower<2>& t)
+{
+ // qDebug("ha");
+ if( throwType == ThrowAtComparison ) {
+ throwType = ThrowNot;
+ throw ThrowAtComparison;
+ }
+ return (uint)t.value();
+}
+
+typedef FlexibleThrower<2> FlexibleThrowerSmall;
+typedef QMap<FlexibleThrowerSmall,FlexibleThrowerSmall> MyMap;
+typedef QHash<FlexibleThrowerSmall,FlexibleThrowerSmall> MyHash;
+
+// connect a signal to a slot that throws an exception
+// run this through valgrind to make sure it doesn't corrupt
+void tst_ExceptionSafety::exceptionInSlot()
+{
+ Emitter emitter;
+ ExceptionThrower thrower;
+
+ connect(&emitter, SIGNAL(testSignal()), &thrower, SLOT(thrower()));
+
+ try {
+ emitter.emitTestSignal();
+ } catch (int i) {
+ QCOMPARE(i, 5);
+ }
+}
+
+void tst_ExceptionSafety::exceptionList() {
+
+ {
+ QList<FlexibleThrowerSmall> list;
+ QList<FlexibleThrowerSmall> list2;
+ QList<FlexibleThrowerSmall> list3;
+
+ for( int i = 0; i<10; i++ )
+ list.append( FlexibleThrowerSmall(i) );
+
+ try {
+ throwType = ThrowAtCopy;
+ list.append( FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( list.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ list.prepend( FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( list.at(0).value(), 0 );
+ QCOMPARE( list.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ list.insert( 8, FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( list.at(7).value(), 7 );
+ QCOMPARE( list.at(8).value(), 8 );
+ QCOMPARE( list.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ FlexibleThrowerSmall t = list.takeAt( 6 );
+ } catch (...) {
+ }
+ QCOMPARE( list.at(6).value(), 6 );
+ QCOMPARE( list.at(7).value(), 7 );
+ QCOMPARE( list.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ list3 = list;
+ } catch (...) {
+ }
+ QCOMPARE( list.at(0).value(), 0 );
+ QCOMPARE( list.at(7).value(), 7 );
+ QCOMPARE( list.size(), 10 );
+ QCOMPARE( list3.at(0).value(), 0 );
+ QCOMPARE( list3.at(7).value(), 7 );
+ QCOMPARE( list3.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ list3.append( FlexibleThrowerSmall(11) );
+ } catch (...) {
+ }
+ QCOMPARE( list.at(0).value(), 0 );
+ QCOMPARE( list.at(7).value(), 7 );
+ QCOMPARE( list.size(), 10 );
+ QCOMPARE( list3.at(0).value(), 0 );
+ QCOMPARE( list3.at(7).value(), 7 );
+ QCOMPARE( list3.size(), 10 );
+
+ try {
+ list2.clear();
+ list2.append( FlexibleThrowerSmall(11));
+ throwType = ThrowAtCopy;
+ list3 = list+list2;
+ } catch (...) {
+ }
+ QCOMPARE( list.at(0).value(), 0 );
+ QCOMPARE( list.at(7).value(), 7 );
+ QCOMPARE( list.size(), 10 );
+
+ // check that copy on write works atomar
+ list2.clear();
+ list2.append( FlexibleThrowerSmall(11));
+ list3 = list+list2;
+ try {
+ throwType = ThrowAtCreate;
+ list3[7]=FlexibleThrowerSmall(12);
+ } catch (...) {
+ }
+ QCOMPARE( list.at(7).value(), 7 );
+ QCOMPARE( list.size(), 10 );
+ QCOMPARE( list3.at(7).value(), 7 );
+ QCOMPARE( list3.size(), 11 );
+
+ }
+ QCOMPARE(objCounter, 0 ); // check that every object has been freed
+}
+
+void tst_ExceptionSafety::exceptionLinkedList() {
+
+ {
+ QLinkedList<FlexibleThrowerSmall> list;
+ QLinkedList<FlexibleThrowerSmall> list2;
+ QLinkedList<FlexibleThrowerSmall> list3;
+
+ for( int i = 0; i<10; i++ )
+ list.append( FlexibleThrowerSmall(i) );
+
+ try {
+ throwType = ThrowAtCopy;
+ list.append( FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( list.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ list.prepend( FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( list.first().value(), 0 );
+ QCOMPARE( list.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ list3 = list;
+ list3.append( FlexibleThrowerSmall(11) );
+ } catch (...) {
+ }
+ QCOMPARE( list.first().value(), 0 );
+ QCOMPARE( list.size(), 10 );
+ QCOMPARE( list3.size(), 10 );
+ }
+ QCOMPARE(objCounter, 0 ); // check that every object has been freed
+}
+
+void tst_ExceptionSafety::exceptionVector() {
+
+ {
+ QVector<FlexibleThrowerSmall> vector;
+ QVector<FlexibleThrowerSmall> vector2;
+ QVector<FlexibleThrowerSmall> vector3;
+
+ for (int i = 0; i<10; i++)
+ vector.append( FlexibleThrowerSmall(i) );
+
+ try {
+ throwType = ThrowAtCopy;
+ vector.append( FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( vector.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ vector.prepend( FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(0).value(), 0 );
+ QCOMPARE( vector.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ vector.insert( 8, FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(7).value(), 7 );
+ QCOMPARE( vector.at(8).value(), 8 );
+ QCOMPARE( vector.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ vector3 = vector;
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(0).value(), 0 );
+ QCOMPARE( vector.at(7).value(), 7 );
+ QCOMPARE( vector.size(), 10 );
+ QCOMPARE( vector3.at(0).value(), 0 );
+ QCOMPARE( vector3.at(7).value(), 7 );
+ QCOMPARE( vector3.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ vector3.append( FlexibleThrowerSmall(11) );
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(0).value(), 0 );
+ QCOMPARE( vector.at(7).value(), 7 );
+ QCOMPARE( vector.size(), 10 );
+ QCOMPARE( vector3.at(0).value(), 0 );
+ QCOMPARE( vector3.at(7).value(), 7 );
+
+ try {
+ vector2.clear();
+ vector2.append( FlexibleThrowerSmall(11));
+ throwType = ThrowAtCopy;
+ vector3 = vector+vector2;
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(0).value(), 0 );
+ QCOMPARE( vector.at(7).value(), 7 );
+ QCOMPARE( vector.size(), 10 );
+
+ // check that copy on write works atomar
+ vector2.clear();
+ vector2.append( FlexibleThrowerSmall(11));
+ vector3 = vector+vector2;
+ try {
+ throwType = ThrowAtCreate;
+ vector3[7]=FlexibleThrowerSmall(12);
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(7).value(), 7 );
+ QCOMPARE( vector.size(), 10 );
+ QCOMPARE( vector3.at(7).value(), 7 );
+ QCOMPARE( vector3.size(), 11 );
+
+ try {
+ throwType = ThrowAtCreate;
+ vector.resize(15);
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(7).value(), 7 );
+ QCOMPARE( vector.size(), 10 );
+
+ try {
+ throwType = ThrowAtCreate;
+ vector.resize(15);
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(7).value(), 7 );
+ QCOMPARE( vector.size(), 10 );
+
+ try {
+ throwType = ThrowLater;
+ vector.fill(FlexibleThrowerSmall(1), 15);
+ } catch (...) {
+ }
+ QCOMPARE( vector.at(0).value(), 0 );
+ QCOMPARE( vector.size(), 10 );
+
+
+ }
+ QCOMPARE(objCounter, 0 ); // check that every object has been freed
+}
+
+
+void tst_ExceptionSafety::exceptionMap() {
+
+ {
+ MyMap map;
+ MyMap map2;
+ MyMap map3;
+
+ throwType = ThrowNot;
+ for (int i = 0; i<10; i++)
+ map[ FlexibleThrowerSmall(i) ] = FlexibleThrowerSmall(i);
+
+ return; // further test are deactivated until Map is fixed.
+
+ for( int i = ThrowAtCopy; i<=ThrowAtComparison; i++ ) {
+ try {
+ throwType = (ThrowType)i;
+ map[ FlexibleThrowerSmall(10) ] = FlexibleThrowerSmall(10);
+ } catch(...) {
+ }
+ QCOMPARE( map.size(), 10 );
+ QCOMPARE( map[ FlexibleThrowerSmall(1) ], FlexibleThrowerSmall(1) );
+ }
+
+ map2 = map;
+ try {
+ throwType = ThrowLater;
+ map2[ FlexibleThrowerSmall(10) ] = FlexibleThrowerSmall(10);
+ } catch(...) {
+ }
+ /* qDebug("%d %d", map.size(), map2.size() );
+ for( int i=0; i<map.size(); i++ )
+ qDebug( "Value at %d: %d",i, map.value(FlexibleThrowerSmall(i), FlexibleThrowerSmall()).value() );
+ QCOMPARE( map.value(FlexibleThrowerSmall(1), FlexibleThrowerSmall()), FlexibleThrowerSmall(1) );
+ qDebug( "Value at %d: %d",1, map[FlexibleThrowerSmall(1)].value() );
+ qDebug("%d %d", map.size(), map2.size() );
+ */
+ QCOMPARE( map[ FlexibleThrowerSmall(1) ], FlexibleThrowerSmall(1) );
+ QCOMPARE( map.size(), 10 );
+ QCOMPARE( map2[ FlexibleThrowerSmall(1) ], FlexibleThrowerSmall(1) );
+ QCOMPARE( map2.size(), 10 );
+
+ }
+ QCOMPARE(objCounter, 0 ); // check that every object has been freed
+}
+
+void tst_ExceptionSafety::exceptionHash() {
+
+ {
+ MyHash hash;
+ MyHash hash2;
+ MyHash hash3;
+
+ for( int i = 0; i<10; i++ )
+ hash[ FlexibleThrowerSmall(i) ] = FlexibleThrowerSmall(i);
+
+ for( int i = ThrowAtCopy; i<=ThrowAtComparison; i++ ) {
+ try {
+ throwType = (ThrowType)i;
+ hash[ FlexibleThrowerSmall(10) ] = FlexibleThrowerSmall(10);
+ } catch(...) {
+ }
+ QCOMPARE( hash.size(), 10 );
+ }
+
+ hash2 = hash;
+ try {
+ throwType = ThrowLater;
+ hash2[ FlexibleThrowerSmall(10) ] = FlexibleThrowerSmall(10);
+ } catch(...) {
+ }
+ QCOMPARE( hash[ FlexibleThrowerSmall(1) ], FlexibleThrowerSmall(1) );
+ QCOMPARE( hash.size(), 10 );
+ QCOMPARE( hash2[ FlexibleThrowerSmall(1) ], FlexibleThrowerSmall(1) );
+ QCOMPARE( hash2.size(), 10 );
+
+ hash2.clear();
+ try {
+ throwType = ThrowLater;
+ hash2.reserve(30);
+ } catch(...) {
+ }
+ QCOMPARE( hash2.size(), 0 );
+
+ /*
+ try {
+ throwType = ThrowAtCopy;
+ hash.prepend( FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( hash.at(0).value(), 0 );
+ QCOMPARE( hash.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ hash.insert( 8, FlexibleThrowerSmall(10));
+ } catch (...) {
+ }
+ QCOMPARE( hash.at(7).value(), 7 );
+ QCOMPARE( hash.at(8).value(), 8 );
+ QCOMPARE( hash.size(), 10 );
+
+ qDebug("val");
+ try {
+ throwType = ThrowAtCopy;
+ hash3 = hash;
+ } catch (...) {
+ }
+ QCOMPARE( hash.at(0).value(), 0 );
+ QCOMPARE( hash.at(7).value(), 7 );
+ QCOMPARE( hash.size(), 10 );
+ QCOMPARE( hash3.at(0).value(), 0 );
+ QCOMPARE( hash3.at(7).value(), 7 );
+ QCOMPARE( hash3.size(), 10 );
+
+ try {
+ throwType = ThrowAtCopy;
+ hash3.append( FlexibleThrowerSmall(11) );
+ } catch (...) {
+ }
+ QCOMPARE( hash.at(0).value(), 0 );
+ QCOMPARE( hash.at(7).value(), 7 );
+ QCOMPARE( hash.size(), 10 );
+ QCOMPARE( hash3.at(0).value(), 0 );
+ QCOMPARE( hash3.at(7).value(), 7 );
+ QCOMPARE( hash3.at(11).value(), 11 );
+
+ try {
+ hash2.clear();
+ hash2.append( FlexibleThrowerSmall(11));
+ throwType = ThrowAtCopy;
+ hash3 = hash+hash2;
+ } catch (...) {
+ }
+ QCOMPARE( hash.at(0).value(), 0 );
+ QCOMPARE( hash.at(7).value(), 7 );
+ QCOMPARE( hash.size(), 10 );
+
+ // check that copy on write works atomar
+ hash2.clear();
+ hash2.append( FlexibleThrowerSmall(11));
+ hash3 = hash+hash2;
+ try {
+ throwType = ThrowAtCopy;
+ hash3[7]=FlexibleThrowerSmall(12);
+ } catch (...) {
+ }
+ QCOMPARE( hash.at(7).value(), 7 );
+ QCOMPARE( hash.size(), 10 );
+ QCOMPARE( hash3.at(7).value(), 7 );
+ QCOMPARE( hash3.size(), 11 );
+ */
+
+
+ }
+ QCOMPARE(objCounter, 0 ); // check that every object has been freed
+}
+
+// Disable these tests until the level of exception safety in event loops is clear
+#if 0
+enum
+{
+ ThrowEventId = QEvent::User + 42,
+ NoThrowEventId = QEvent::User + 43
+};
+
+class ThrowEvent : public QEvent
+{
+public:
+ ThrowEvent()
+ : QEvent(static_cast<QEvent::Type>(ThrowEventId))
+ {
+ }
+};
+
+class NoThrowEvent : public QEvent
+{
+public:
+ NoThrowEvent()
+ : QEvent(static_cast<QEvent::Type>(NoThrowEventId))
+ {}
+};
+
+struct IntEx : public std::exception
+{
+ IntEx(int aEx) : ex(aEx) {}
+ int ex;
+};
+
+class TestObject : public QObject
+{
+public:
+ TestObject()
+ : throwEventCount(0), noThrowEventCount(0) {}
+
+ int throwEventCount;
+ int noThrowEventCount;
+
+protected:
+ bool event(QEvent *event)
+ {
+ if (int(event->type()) == ThrowEventId) {
+ throw IntEx(++throwEventCount);
+ } else if (int(event->type()) == NoThrowEventId) {
+ ++noThrowEventCount;
+ }
+ return QObject::event(event);
+ }
+};
+
+void tst_ExceptionSafety::exceptionEventLoop()
+{
+ // send an event that throws
+ TestObject obj;
+ ThrowEvent throwEvent;
+ try {
+ qApp->sendEvent(&obj, &throwEvent);
+ } catch (IntEx code) {
+ QCOMPARE(code.ex, 1);
+ }
+ QCOMPARE(obj.throwEventCount, 1);
+
+ // post an event that throws
+ qApp->postEvent(&obj, new ThrowEvent);
+
+ try {
+ qApp->processEvents();
+ } catch (IntEx code) {
+ QCOMPARE(code.ex, 2);
+ }
+ QCOMPARE(obj.throwEventCount, 2);
+
+ // post a normal event, then a throwing event, then a normal event
+ // run this in valgrind to ensure that it doesn't leak.
+
+ qApp->postEvent(&obj, new NoThrowEvent);
+ qApp->postEvent(&obj, new ThrowEvent);
+ qApp->postEvent(&obj, new NoThrowEvent);
+
+ try {
+ qApp->processEvents();
+ } catch (IntEx code) {
+ QCOMPARE(code.ex, 3);
+ }
+ // here, we should have received on non-throwing event and one throwing one
+ QCOMPARE(obj.throwEventCount, 3);
+#ifndef __SYMBIAN32__
+ // symbian event loops will have absorbed the exceptions
+ QCOMPARE(obj.noThrowEventCount, 1);
+#endif
+
+ // spin the event loop again
+ qApp->processEvents();
+
+ // now, we should have received the second non-throwing event
+ QCOMPARE(obj.noThrowEventCount, 2);
+}
+
+void tst_ExceptionSafety::exceptionSignalSlot()
+{
+ Emitter e;
+ ExceptionThrower thrower;
+ Receiver r1;
+ Receiver r2;
+
+ // connect a signal to a normal object, a thrower and a normal object again
+ connect(&e, SIGNAL(testSignal()), &r1, SLOT(receiver()));
+ connect(&e, SIGNAL(testSignal()), &thrower, SLOT(thrower()));
+ connect(&e, SIGNAL(testSignal()), &r2, SLOT(receiver()));
+
+ int code = 0;
+ try {
+ e.emitTestSignal();
+ } catch (int c) {
+ code = c;
+ }
+
+ // 5 is the magic number that's thrown by thrower
+ QCOMPARE(code, 5);
+
+ // assumption: slots are called in the connection order
+ QCOMPARE(r1.received, 1);
+ QCOMPARE(r2.received, 0);
+}
+#endif
+
+QTEST_MAIN(tst_ExceptionSafety)
+#include "tst_exceptionsafety.moc"
+#endif // QT_NO_EXCEPTIONS