Long live Qt 4.5!

1 files changed, 882 insertions, 0 deletions

diff --git a/tests/auto/qset/tst_qset.cpp b/tests/auto/qset/tst_qset.cpp
new file mode 100644
index 0000000..7afcd84
--- /dev/null
+++ b/tests/auto/qset/tst_qset.cpp
@@ -0,0 +1,882 @@
+/****************************************************************************
+**
+** 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 <QtTest/QtTest>
+#include <qset.h>
+#include <qdebug.h>
+
+//TESTED_CLASS=
+//TESTED_FILES=
+
+int toNumber(const QString &str)
+{
+    int res = 0;
+    for (int i = 0; i < str.length(); ++i)
+        res = (res * 10) + str[i].digitValue();
+    return res;
+}
+
+class tst_QSet : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QSet() {}
+    virtual ~tst_QSet() {}
+
+private slots:
+    void operator_eq();
+    void size();
+    void capacity();
+    void reserve();
+    void squeeze();
+    void detach();
+    void isDetached();
+    void clear();
+    void remove();
+    void contains();
+    void begin();
+    void end();
+    void insert();
+    void setOperations();
+    void stlIterator();
+    void stlMutableIterator();
+    void javaIterator();
+    void javaMutableIterator();
+    void makeSureTheComfortFunctionsCompile();
+};
+
+void tst_QSet::operator_eq()
+{
+    {
+        QSet<int> set1, set2;
+        QVERIFY(set1 == set2);
+        QVERIFY(!(set1 != set2));
+
+        set1.insert(1);
+        QVERIFY(set1 != set2);
+        QVERIFY(!(set1 == set2));
+
+        set2.insert(1);
+        QVERIFY(set1 == set2);
+        QVERIFY(!(set1 != set2));
+
+        set2.insert(1);
+        QVERIFY(set1 == set2);
+        QVERIFY(!(set1 != set2));
+
+        set1.insert(2);
+        QVERIFY(set1 != set2);
+        QVERIFY(!(set1 == set2));
+    }
+
+    {
+        QSet<QString> set1, set2;
+        QVERIFY(set1 == set2);
+        QVERIFY(!(set1 != set2));
+
+        set1.insert("one");
+        QVERIFY(set1 != set2);
+        QVERIFY(!(set1 == set2));
+
+        set2.insert("one");
+        QVERIFY(set1 == set2);
+        QVERIFY(!(set1 != set2));
+
+        set2.insert("one");
+        QVERIFY(set1 == set2);
+        QVERIFY(!(set1 != set2));
+
+        set1.insert("two");
+        QVERIFY(set1 != set2);
+        QVERIFY(!(set1 == set2));
+    }
+
+    {
+        // Task 102658
+        QSet<QString> a;
+        QSet<QString> b;
+
+        a += "otto";
+        b += "willy";
+
+        QVERIFY(a != b);
+        QVERIFY(!(a == b));
+    }
+}
+
+void tst_QSet::size()
+{
+    QSet<int> set;
+    QVERIFY(set.size() == 0);
+    QVERIFY(set.isEmpty());
+    QVERIFY(set.count() == set.size());
+    QVERIFY(set.isEmpty() == set.empty());
+
+    set.insert(1);
+    QVERIFY(set.size() == 1);
+    QVERIFY(!set.isEmpty());
+    QVERIFY(set.count() == set.size());
+    QVERIFY(set.isEmpty() == set.empty());
+
+    set.insert(1);
+    QVERIFY(set.size() == 1);
+    QVERIFY(!set.isEmpty());
+    QVERIFY(set.count() == set.size());
+    QVERIFY(set.isEmpty() == set.empty());
+
+    set.insert(2);
+    QVERIFY(set.size() == 2);
+    QVERIFY(!set.isEmpty());
+    QVERIFY(set.count() == set.size());
+    QVERIFY(set.isEmpty() == set.empty());
+
+    set.remove(1);
+    QVERIFY(set.size() == 1);
+    QVERIFY(!set.isEmpty());
+    QVERIFY(set.count() == set.size());
+    QVERIFY(set.isEmpty() == set.empty());
+
+    set.remove(1);
+    QVERIFY(set.size() == 1);
+    QVERIFY(!set.isEmpty());
+    QVERIFY(set.count() == set.size());
+    QVERIFY(set.isEmpty() == set.empty());
+
+    set.remove(2);
+    QVERIFY(set.size() == 0);
+    QVERIFY(set.isEmpty());
+    QVERIFY(set.count() == set.size());
+    QVERIFY(set.isEmpty() == set.empty());
+}
+
+void tst_QSet::capacity()
+{
+    QSet<int> set;
+    int n = set.capacity();
+    QVERIFY(n == 0);
+
+    for (int i = 0; i < 1000; ++i) {
+        set.insert(i);
+        QVERIFY(set.capacity() >= set.size());
+    }
+}
+
+void tst_QSet::reserve()
+{
+    QSet<int> set;
+    int n = set.capacity();
+    QVERIFY(n == 0);
+
+    set.reserve(1000);
+    QVERIFY(set.capacity() >= 1000);
+
+    for (int i = 0; i < 500; ++i)
+        set.insert(i);
+
+    QVERIFY(set.capacity() >= 1000);
+
+    for (int j = 0; j < 500; ++j)
+        set.remove(j);
+
+    QVERIFY(set.capacity() >= 1000);
+
+    set.clear();
+    QVERIFY(set.capacity() == 0);
+}
+
+void tst_QSet::squeeze()
+{
+    QSet<int> set;
+    int n = set.capacity();
+    QVERIFY(n == 0);
+
+    set.reserve(1000);
+    QVERIFY(set.capacity() >= 1000);
+
+    set.squeeze();
+    QVERIFY(set.capacity() < 100);
+
+    for (int i = 0; i < 500; ++i)
+        set.insert(i);
+    QVERIFY(set.capacity() >= 500 && set.capacity() < 10000);
+
+    set.reserve(50000);
+    QVERIFY(set.capacity() >= 50000);
+
+    set.squeeze();
+    QVERIFY(set.capacity() < 500);
+
+    set.remove(499);
+    QVERIFY(set.capacity() < 500);
+
+    set.insert(499);
+    QVERIFY(set.capacity() >= 500);
+
+    for (int i = 0; i < 500; ++i)
+        set.remove(i);
+    set.squeeze();
+    QVERIFY(set.capacity() < 100);
+}
+
+void tst_QSet::detach()
+{
+    QSet<int> set;
+    set.detach();
+
+    set.insert(1);
+    set.insert(2);
+    set.detach();
+
+    QSet<int> copy = set;
+    set.detach();
+}
+
+void tst_QSet::isDetached()
+{
+    QSet<int> set1, set2;
+    QVERIFY(!set1.isDetached()); // shared_null
+    QVERIFY(!set2.isDetached()); // shared_null
+
+    set1.insert(1);
+    QVERIFY(set1.isDetached());
+    QVERIFY(!set2.isDetached()); // shared_null
+
+    set2 = set1;
+    QVERIFY(!set1.isDetached());
+    QVERIFY(!set2.isDetached());
+
+    set1.detach();
+    QVERIFY(set1.isDetached());
+    QVERIFY(set2.isDetached());
+}
+
+void tst_QSet::clear()
+{
+    QSet<QString> set1, set2;
+    QVERIFY(set1.size() == 0);
+
+    set1.clear();
+    QVERIFY(set1.size() == 0);
+
+    set1.insert("foo");
+    QVERIFY(set1.size() != 0);
+
+    set2 = set1;
+
+    set1.clear();
+    QVERIFY(set1.size() == 0);
+    QVERIFY(set2.size() != 0);
+
+    set2.clear();
+    QVERIFY(set1.size() == 0);
+    QVERIFY(set2.size() == 0);
+}
+
+void tst_QSet::remove()
+{
+    QSet<QString> set1;
+
+    for (int i = 0; i < 500; ++i)
+        set1.insert(QString::number(i));
+
+    QCOMPARE(set1.size(), 500);
+
+    for (int j = 0; j < 500; ++j) {
+        set1.remove(QString::number((j * 17) % 500));
+        QCOMPARE(set1.size(), 500 - j - 1);
+    }
+}
+
+void tst_QSet::contains()
+{
+    QSet<QString> set1;
+
+    for (int i = 0; i < 500; ++i) {
+        QVERIFY(!set1.contains(QString::number(i)));
+        set1.insert(QString::number(i));
+        QVERIFY(set1.contains(QString::number(i)));
+    }
+
+    QCOMPARE(set1.size(), 500);
+
+    for (int j = 0; j < 500; ++j) {
+        int i = (j * 17) % 500;
+        QVERIFY(set1.contains(QString::number(i)));
+        set1.remove(QString::number(i));
+        QVERIFY(!set1.contains(QString::number(i)));
+    }
+}
+
+void tst_QSet::begin()
+{
+    QSet<int> set1;
+    QSet<int> set2 = set1;
+
+    {
+        QSet<int>::const_iterator i = set1.constBegin();
+        QSet<int>::const_iterator j = set1.constBegin();
+        QSet<int>::const_iterator k = set2.constBegin();
+        QSet<int>::const_iterator ell = set2.constBegin();
+
+        QVERIFY(i == j);
+        QVERIFY(k == ell);
+        QVERIFY(i == k);
+        QVERIFY(j == ell);
+    }
+
+    set1.insert(44);
+
+    {
+        QSet<int>::const_iterator i = set1.constBegin();
+        QSet<int>::const_iterator j = set1.constBegin();
+        QSet<int>::const_iterator k = set2.constBegin();
+        QSet<int>::const_iterator ell = set2.constBegin();
+
+        QVERIFY(i == j);
+        QVERIFY(k == ell);
+        QVERIFY(i != k);
+        QVERIFY(j != ell);
+    }
+
+    set2 = set1;
+
+    {
+        QSet<int>::const_iterator i = set1.constBegin();
+        QSet<int>::const_iterator j = set1.constBegin();
+        QSet<int>::const_iterator k = set2.constBegin();
+        QSet<int>::const_iterator ell = set2.constBegin();
+
+        QVERIFY(i == j);
+        QVERIFY(k == ell);
+        QVERIFY(i == k);
+        QVERIFY(j == ell);
+    }
+}
+
+void tst_QSet::end()
+{
+    QSet<int> set1;
+    QSet<int> set2 = set1;
+
+    {
+        QSet<int>::const_iterator i = set1.constEnd();
+        QSet<int>::const_iterator j = set1.constEnd();
+        QSet<int>::const_iterator k = set2.constEnd();
+        QSet<int>::const_iterator ell = set2.constEnd();
+
+        QVERIFY(i == j);
+        QVERIFY(k == ell);
+        QVERIFY(i == k);
+        QVERIFY(j == ell);
+
+        QVERIFY(set1.constBegin() == set1.constEnd());
+        QVERIFY(set2.constBegin() == set2.constEnd());
+    }
+
+    set1.insert(44);
+
+    {
+        QSet<int>::const_iterator i = set1.constEnd();
+        QSet<int>::const_iterator j = set1.constEnd();
+        QSet<int>::const_iterator k = set2.constEnd();
+        QSet<int>::const_iterator ell = set2.constEnd();
+
+        QVERIFY(i == j);
+        QVERIFY(k == ell);
+        QVERIFY(i != k);
+        QVERIFY(j != ell);
+
+        QVERIFY(set1.constBegin() != set1.constEnd());
+        QVERIFY(set2.constBegin() == set2.constEnd());
+    }
+
+    set2 = set1;
+
+    {
+        QSet<int>::const_iterator i = set1.constEnd();
+        QSet<int>::const_iterator j = set1.constEnd();
+        QSet<int>::const_iterator k = set2.constEnd();
+        QSet<int>::const_iterator ell = set2.constEnd();
+
+        QVERIFY(i == j);
+        QVERIFY(k == ell);
+        QVERIFY(i == k);
+        QVERIFY(j == ell);
+
+        QVERIFY(set1.constBegin() != set1.constEnd());
+        QVERIFY(set2.constBegin() != set2.constEnd());
+    }
+
+    set1.clear();
+    set2.clear();
+    QVERIFY(set1.constBegin() == set1.constEnd());
+    QVERIFY(set2.constBegin() == set2.constEnd());
+}
+
+void tst_QSet::insert()
+{
+    {
+        QSet<int> set1;
+        QVERIFY(set1.size() == 0);
+        set1.insert(1);
+        QVERIFY(set1.size() == 1);
+        set1.insert(2);
+        QVERIFY(set1.size() == 2);
+        set1.insert(2);
+        QVERIFY(set1.size() == 2);
+        QVERIFY(set1.contains(2));
+        set1.remove(2);
+        QVERIFY(set1.size() == 1);
+        QVERIFY(!set1.contains(2));
+        set1.insert(2);
+        QVERIFY(set1.size() == 2);
+        QVERIFY(set1.contains(2));
+    }
+
+    {
+        QSet<int> set1;
+        QVERIFY(set1.size() == 0);
+        set1 << 1;
+        QVERIFY(set1.size() == 1);
+        set1 << 2;
+        QVERIFY(set1.size() == 2);
+        set1 << 2;
+        QVERIFY(set1.size() == 2);
+        QVERIFY(set1.contains(2));
+        set1.remove(2);
+        QVERIFY(set1.size() == 1);
+        QVERIFY(!set1.contains(2));
+        set1 << 2;
+        QVERIFY(set1.size() == 2);
+        QVERIFY(set1.contains(2));
+    }
+}
+
+void tst_QSet::setOperations()
+{
+    QSet<QString> set1, set2;
+    set1 << "alpha" << "beta" << "gamma" << "delta"              << "zeta"           << "omega";
+    set2            << "beta" << "gamma" << "delta" << "epsilon"           << "iota" << "omega";
+
+    QSet<QString> set3 = set1;
+    set3.unite(set2);
+    QVERIFY(set3.size() == 8);
+    QVERIFY(set3.contains("alpha"));
+    QVERIFY(set3.contains("beta"));
+    QVERIFY(set3.contains("gamma"));
+    QVERIFY(set3.contains("delta"));
+    QVERIFY(set3.contains("epsilon"));
+    QVERIFY(set3.contains("zeta"));
+    QVERIFY(set3.contains("iota"));
+    QVERIFY(set3.contains("omega"));
+
+    QSet<QString> set4 = set2;
+    set4.unite(set1);
+    QVERIFY(set4.size() == 8);
+    QVERIFY(set4.contains("alpha"));
+    QVERIFY(set4.contains("beta"));
+    QVERIFY(set4.contains("gamma"));
+    QVERIFY(set4.contains("delta"));
+    QVERIFY(set4.contains("epsilon"));
+    QVERIFY(set4.contains("zeta"));
+    QVERIFY(set4.contains("iota"));
+    QVERIFY(set4.contains("omega"));
+
+    QVERIFY(set3 == set4);
+
+    QSet<QString> set5 = set1;
+    set5.intersect(set2);
+    QVERIFY(set5.size() == 4);
+    QVERIFY(set5.contains("beta"));
+    QVERIFY(set5.contains("gamma"));
+    QVERIFY(set5.contains("delta"));
+    QVERIFY(set5.contains("omega"));
+
+    QSet<QString> set6 = set2;
+    set6.intersect(set1);
+    QVERIFY(set6.size() == 4);
+    QVERIFY(set6.contains("beta"));
+    QVERIFY(set6.contains("gamma"));
+    QVERIFY(set6.contains("delta"));
+    QVERIFY(set6.contains("omega"));
+
+    QVERIFY(set5 == set6);
+
+    QSet<QString> set7 = set1;
+    set7.subtract(set2);
+    QVERIFY(set7.size() == 2);
+    QVERIFY(set7.contains("alpha"));
+    QVERIFY(set7.contains("zeta"));
+
+    QSet<QString> set8 = set2;
+    set8.subtract(set1);
+    QVERIFY(set8.size() == 2);
+    QVERIFY(set8.contains("epsilon"));
+    QVERIFY(set8.contains("iota"));
+
+    QSet<QString> set9 = set1 | set2;
+    QVERIFY(set9 == set3);
+
+    QSet<QString> set10 = set1 & set2;
+    QVERIFY(set10 == set5);
+
+    QSet<QString> set11 = set1 + set2;
+    QVERIFY(set11 == set3);
+
+    QSet<QString> set12 = set1 - set2;
+    QVERIFY(set12 == set7);
+
+    QSet<QString> set13 = set2 - set1;
+    QVERIFY(set13 == set8);
+
+    QSet<QString> set14 = set1;
+    set14 |= set2;
+    QVERIFY(set14 == set3);
+
+    QSet<QString> set15 = set1;
+    set15 &= set2;
+    QVERIFY(set15 == set5);
+
+    QSet<QString> set16 = set1;
+    set16 += set2;
+    QVERIFY(set16 == set3);
+
+    QSet<QString> set17 = set1;
+    set17 -= set2;
+    QVERIFY(set17 == set7);
+
+    QSet<QString> set18 = set2;
+    set18 -= set1;
+    QVERIFY(set18 == set8);
+}
+
+void tst_QSet::stlIterator()
+{
+    QSet<QString> set1;
+    for (int i = 0; i < 25000; ++i)
+        set1.insert(QString::number(i));
+
+    {
+        int sum = 0;
+        QSet<QString>::const_iterator i = set1.begin();
+        while (i != set1.end()) {
+            sum += toNumber(*i);
+            ++i;
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QSet<QString>::const_iterator i = set1.end();
+        while (i != set1.begin()) {
+            --i;
+            sum += toNumber(*i);
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+}
+
+void tst_QSet::stlMutableIterator()
+{
+#if QT_VERSION < 0x040200
+    QSKIP("Needs Qt >= 4.2", SkipAll);
+#else
+    QSet<QString> set1;
+    for (int i = 0; i < 25000; ++i)
+        set1.insert(QString::number(i));
+
+    {
+        int sum = 0;
+        QSet<QString>::iterator i = set1.begin();
+        while (i != set1.end()) {
+            sum += toNumber(*i);
+            ++i;
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QSet<QString>::iterator i = set1.end();
+        while (i != set1.begin()) {
+            --i;
+            sum += toNumber(*i);
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        QSet<QString> set2 = set1;
+        QSet<QString> set3 = set2;
+
+        QSet<QString>::iterator i = set2.begin();
+        QSet<QString>::iterator j = set3.begin();
+
+        while (i != set2.end()) {
+            i = set2.erase(i);
+        }
+        QVERIFY(set2.isEmpty());
+        QVERIFY(!set3.isEmpty());
+
+        j = set3.end();
+        while (j != set3.begin()) {
+            j--;
+            if (j + 1 != set3.end())
+                set3.erase(j + 1);
+        }
+        if (set3.begin() != set3.end())
+            set3.erase(set3.begin());
+
+        QVERIFY(set2.isEmpty());
+        QVERIFY(set3.isEmpty());
+
+#if QT_VERSION >= 0x050000
+        i = set2.insert("foo");
+#else
+        QSet<QString>::const_iterator k = set2.insert("foo");
+        i = reinterpret_cast<QSet<QString>::iterator &>(k);
+#endif
+        QVERIFY(*i == "foo");
+    }
+#endif
+}
+
+void tst_QSet::javaIterator()
+{
+    QSet<QString> set1;
+    for (int k = 0; k < 25000; ++k)
+        set1.insert(QString::number(k));
+
+    {
+        int sum = 0;
+        QSetIterator<QString> i(set1);
+        while (i.hasNext())
+            sum += toNumber(i.next());
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QSetIterator<QString> i(set1);
+        while (i.hasNext()) {
+            sum += toNumber(i.peekNext());
+            i.next();
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QSetIterator<QString> i(set1);
+        while (i.hasNext()) {
+            i.next();
+            sum += toNumber(i.peekPrevious());
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QSetIterator<QString> i(set1);
+        i.toBack();
+        while (i.hasPrevious())
+            sum += toNumber(i.previous());
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QSetIterator<QString> i(set1);
+        i.toBack();
+        while (i.hasPrevious()) {
+            sum += toNumber(i.peekPrevious());
+            i.previous();
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QSetIterator<QString> i(set1);
+        i.toBack();
+        while (i.hasPrevious()) {
+            i.previous();
+            sum += toNumber(i.peekNext());
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    int sum1 = 0;
+    int sum2 = 0;
+    QSetIterator<QString> i(set1);
+    QSetIterator<QString> j(set1);
+
+    int n = 0;
+    while (i.hasNext()) {
+        QVERIFY(j.hasNext());
+        set1.remove(i.peekNext());
+        sum1 += toNumber(i.next());
+        sum2 += toNumber(j.next());
+        ++n;
+    }
+    QVERIFY(!j.hasNext());
+    QVERIFY(sum1 == 24999 * 25000 / 2);
+    QVERIFY(sum2 == sum1);
+    QVERIFY(set1.isEmpty());
+}
+
+void tst_QSet::javaMutableIterator()
+{
+#if QT_VERSION < 0x040200
+    QSKIP("Needs Qt >= 4.2", SkipAll);
+#else
+    QSet<QString> set1;
+    for (int k = 0; k < 25000; ++k)
+        set1.insert(QString::number(k));
+
+    {
+        int sum = 0;
+        QMutableSetIterator<QString> i(set1);
+        while (i.hasNext())
+            sum += toNumber(i.next());
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QMutableSetIterator<QString> i(set1);
+        while (i.hasNext()) {
+            sum += toNumber(i.peekNext());
+            i.next();
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QMutableSetIterator<QString> i(set1);
+        while (i.hasNext()) {
+            i.next();
+            sum += toNumber(i.peekPrevious());
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QMutableSetIterator<QString> i(set1);
+        i.toBack();
+        while (i.hasPrevious())
+            sum += toNumber(i.previous());
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QMutableSetIterator<QString> i(set1);
+        i.toBack();
+        while (i.hasPrevious()) {
+            sum += toNumber(i.peekPrevious());
+            i.previous();
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        int sum = 0;
+        QMutableSetIterator<QString> i(set1);
+        i.toBack();
+        while (i.hasPrevious()) {
+            i.previous();
+            sum += toNumber(i.peekNext());
+        }
+        QVERIFY(sum == 24999 * 25000 / 2);
+    }
+
+    {
+        QSet<QString> set2 = set1;
+        QSet<QString> set3 = set2;
+
+        QMutableSetIterator<QString> i(set2);
+        QMutableSetIterator<QString> j(set3);
+
+        while (i.hasNext()) {
+            i.next();
+            i.remove();
+        }
+        QVERIFY(set2.isEmpty());
+        QVERIFY(!set3.isEmpty());
+
+        j.toBack();
+        while (j.hasPrevious()) {
+            j.previous();
+            j.remove();
+        }
+        QVERIFY(set2.isEmpty());
+        QVERIFY(set3.isEmpty());
+    }
+#endif
+}
+
+void tst_QSet::makeSureTheComfortFunctionsCompile()
+{
+    QSet<int> set1, set2, set3;
+    set1 << 5;
+    set1 |= set2;
+    set1 |= 5;
+    set1 &= set2;
+    set1 &= 5;
+    set1 += set2;
+    set1 += 5;
+    set1 -= set2;
+    set1 -= 5;
+    set1 = set2 | set3;
+    set1 = set2 & set3;
+    set1 = set2 + set3;
+    set1 = set2 - set3;
+}
+
+QTEST_APPLESS_MAIN(tst_QSet)
+
+#include "tst_qset.moc"