Autotest for QGuard

Reviewed-by: Andreas

1 files changed, 350 insertions, 0 deletions

diff --git a/tests/auto/qguard/tst_qguard.cpp b/tests/auto/qguard/tst_qguard.cpp
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index 0000000..96d1b60
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+++ b/tests/auto/qguard/tst_qguard.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** 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 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// NOTE: This is identical to the QPointer autotest
+
+#include <QtTest/QtTest>
+
+#include <QApplication>
+#include <QDebug>
+#include <QWidget>
+#include <private/qguard_p.h>
+
+class tst_QGuard : public QObject
+{
+    Q_OBJECT
+public:
+    tst_QGuard();
+    ~tst_QGuard();
+
+    inline tst_QGuard *me() const
+    { return const_cast<tst_QGuard *>(this); }
+
+public slots:
+    void initTestCase();
+    void cleanupTestCase();
+    void init();
+    void cleanup();
+private slots:
+    void constructors();
+    void destructor();
+    void assignment_operators();
+    void equality_operators();
+    void isNull();
+    void dereference_operators();
+    void disconnect();
+    void castDuringDestruction();
+    void data() const;
+    void dataSignature() const;
+};
+
+tst_QGuard::tst_QGuard()
+{ }
+
+tst_QGuard::~tst_QGuard()
+{ }
+
+void tst_QGuard::initTestCase()
+{ }
+
+void tst_QGuard::cleanupTestCase()
+{ }
+
+void tst_QGuard::init()
+{ }
+
+void tst_QGuard::cleanup()
+{ }
+
+void tst_QGuard::constructors()
+{
+    QGuard<QObject> p1;
+    QGuard<QObject> p2(this);
+    QGuard<QObject> p3(p2);
+    QCOMPARE(p1, QGuard<QObject>(0));
+    QCOMPARE(p2, QGuard<QObject>(this));
+    QCOMPARE(p3, QGuard<QObject>(this));
+}
+
+void tst_QGuard::destructor()
+{
+    QObject *object = new QObject;
+    QGuard<QObject> p = object;
+    QCOMPARE(p, QGuard<QObject>(object));
+    delete object;
+    QCOMPARE(p, QGuard<QObject>(0));
+}
+
+void tst_QGuard::assignment_operators()
+{
+    QGuard<QObject> p1;
+    QGuard<QObject> p2;
+
+    p1 = this;
+    p2 = p1;
+
+    QCOMPARE(p1, QGuard<QObject>(this));
+    QCOMPARE(p2, QGuard<QObject>(this));
+    QCOMPARE(p1, QGuard<QObject>(p2));
+
+    p1 = 0;
+    p2 = p1;
+    QCOMPARE(p1, QGuard<QObject>(0));
+    QCOMPARE(p2, QGuard<QObject>(0));
+    QCOMPARE(p1, QGuard<QObject>(p2));
+
+    QObject *object = new QObject;
+
+    p1 = object;
+    p2 = p1;
+    QCOMPARE(p1, QGuard<QObject>(object));
+    QCOMPARE(p2, QGuard<QObject>(object));
+    QCOMPARE(p1, QGuard<QObject>(p2));
+
+    delete object;
+    QCOMPARE(p1, QGuard<QObject>(0));
+    QCOMPARE(p2, QGuard<QObject>(0));
+    QCOMPARE(p1, QGuard<QObject>(p2));
+}
+
+void tst_QGuard::equality_operators()
+{
+    QGuard<QObject> p1;
+    QGuard<QObject> p2;
+
+    QVERIFY(p1 == p2);
+
+    QObject *object = 0;
+    QWidget *widget = 0;
+
+    p1 = object;
+    QVERIFY(p1 == p2);
+    QVERIFY(p1 == object);
+    p2 = object;
+    QVERIFY(p2 == p1);
+    QVERIFY(p2 == object);
+
+    p1 = this;
+    QVERIFY(p1 != p2);
+    p2 = p1;
+    QVERIFY(p1 == p2);
+
+    // compare to zero
+    p1 = 0;
+    QVERIFY(p1 == 0);
+    QVERIFY(0 == p1);
+    QVERIFY(p2 != 0);
+    QVERIFY(0 != p2);
+    QVERIFY(p1 == object);
+    QVERIFY(object == p1);
+    QVERIFY(p2 != object);
+    QVERIFY(object != p2);
+    QVERIFY(p1 == widget);
+    QVERIFY(widget == p1);
+    QVERIFY(p2 != widget);
+    QVERIFY(widget != p2);
+}
+
+void tst_QGuard::isNull()
+{
+    QGuard<QObject> p1;
+    QVERIFY(p1.isNull());
+    p1 = this;
+    QVERIFY(!p1.isNull());
+    p1 = 0;
+    QVERIFY(p1.isNull());
+}
+
+void tst_QGuard::dereference_operators()
+{
+    QGuard<tst_QGuard> p1 = this;
+
+    QObject *object = p1->me();
+    QVERIFY(object == this);
+
+    QObject &ref = *p1;
+    QVERIFY(&ref == this);
+
+    object = static_cast<QObject *>(p1);
+    QVERIFY(object == this);
+}
+
+void tst_QGuard::disconnect()
+{
+    QGuard<QObject> p1 = new QObject;
+    QVERIFY(!p1.isNull());
+    p1->disconnect();
+    QVERIFY(!p1.isNull());
+    delete static_cast<QObject *>(p1);
+    QVERIFY(p1.isNull());
+}
+
+class ChildObject : public QObject
+{
+    QGuard<QObject> guardedPointer;
+
+public:
+    ChildObject(QObject *parent)
+        : QObject(parent), guardedPointer(parent)
+    { }
+    ~ChildObject();
+};
+
+ChildObject::~ChildObject()
+{
+    QCOMPARE(static_cast<QObject *>(guardedPointer), static_cast<QObject *>(0));
+    QCOMPARE(qobject_cast<QObject *>(guardedPointer), static_cast<QObject *>(0));
+}
+
+class ChildWidget : public QWidget
+{
+    QGuard<QWidget> guardedPointer;
+
+public:
+    ChildWidget(QWidget *parent)
+        : QWidget(parent), guardedPointer(parent)
+    { }
+    ~ChildWidget();
+};
+
+ChildWidget::~ChildWidget()
+{
+    QCOMPARE(static_cast<QWidget *>(guardedPointer), static_cast<QWidget *>(0));
+    QCOMPARE(qobject_cast<QWidget *>(guardedPointer), static_cast<QWidget *>(0));
+}
+
+class DerivedChild;
+
+class DerivedParent : public QObject
+{
+    Q_OBJECT
+
+    DerivedChild *derivedChild;
+
+public:
+    DerivedParent();
+    ~DerivedParent();
+};
+
+class DerivedChild : public QObject
+{
+    Q_OBJECT
+
+    DerivedParent *parentPointer;
+    QGuard<DerivedParent> guardedParentPointer;
+
+public:
+    DerivedChild(DerivedParent *parent)
+        : QObject(parent), parentPointer(parent), guardedParentPointer(parent)
+    { }
+    ~DerivedChild();
+};
+
+DerivedParent::DerivedParent()
+    : QObject()
+{
+    derivedChild = new DerivedChild(this);
+}
+
+DerivedParent::~DerivedParent()
+{
+    delete derivedChild;
+}
+
+DerivedChild::~DerivedChild()
+{
+    QCOMPARE(static_cast<DerivedParent *>(guardedParentPointer), parentPointer);
+    QCOMPARE(qobject_cast<DerivedParent *>(guardedParentPointer), parentPointer);
+}
+
+void tst_QGuard::castDuringDestruction()
+{
+    {
+        QObject *parentObject = new QObject();
+        (void) new ChildObject(parentObject);
+        delete parentObject;
+    }
+
+    {
+        QWidget *parentWidget = new QWidget();
+        (void) new ChildWidget(parentWidget);
+        delete parentWidget;
+    }
+
+    {
+        delete new DerivedParent();
+    }
+}
+
+void tst_QGuard::data() const
+{
+    /* Check value of a default constructed object. */
+    {
+        QGuard<QObject> p;
+        QCOMPARE(p.data(), static_cast<QObject *>(0));
+    }
+
+    /* Check value of a default constructed object. */
+    {
+        QObject *const object = new QObject();
+        QGuard<QObject> p(object);
+        QCOMPARE(p.data(), object);
+    }
+}
+
+void tst_QGuard::dataSignature() const
+{
+    /* data() should be const. */
+    {
+        const QGuard<QObject> p;
+        p.data();
+    }
+
+    /* The return type should be T. */
+    {
+        const QGuard<QWidget> p;
+        /* If the types differs, the QCOMPARE will fail to instansiate. */
+        QCOMPARE(p.data(), static_cast<QWidget *>(0));
+    }
+}
+
+QTEST_MAIN(tst_QGuard)
+#include "tst_qguard.moc"