summaryrefslogtreecommitdiffstats
path: root/tests/auto/qpointer/tst_qpointer.cpp
blob: fed98ec86a894dc83fed26485313fb05409027af (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
/****************************************************************************
**
** Copyright (C) 2011 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtTest/QtTest>

#include <QPointer>
#include <QWidget>

class tst_QPointer : public QObject
{
    Q_OBJECT
public:
    inline tst_QPointer *me() const
    { return const_cast<tst_QPointer *>(this); }

private slots:
    void constructors();
    void destructor();
    void assignment_operators();
    void equality_operators();
    void isNull();
    void dereference_operators();
    void disconnect();
    void castDuringDestruction();
    void threadSafety();
};

void tst_QPointer::constructors()
{
    QPointer<QObject> p1;
    QPointer<QObject> p2(this);
    QPointer<QObject> p3(p2);
    QCOMPARE(p1, QPointer<QObject>(0));
    QCOMPARE(p2, QPointer<QObject>(this));
    QCOMPARE(p3, QPointer<QObject>(this));
}

void tst_QPointer::destructor()
{
    // Make two QPointer's to the same object
    QObject *object = new QObject;
    QPointer<QObject> p1 = object;
    QPointer<QObject> p2 = object;
    // Check that they point to the correct object
    QCOMPARE(p1, QPointer<QObject>(object));
    QCOMPARE(p2, QPointer<QObject>(object));
    QCOMPARE(p1, p2);
    // Destroy the guarded object
    delete object;
    // Check that both pointers were zeroed
    QCOMPARE(p1, QPointer<QObject>(0));
    QCOMPARE(p2, QPointer<QObject>(0));
    QCOMPARE(p1, p2);
}

void tst_QPointer::assignment_operators()
{
    QPointer<QObject> p1;
    QPointer<QObject> p2;

    // Test assignment with a QObject-derived object pointer
    p1 = this;
    p2 = p1;
    QCOMPARE(p1, QPointer<QObject>(this));
    QCOMPARE(p2, QPointer<QObject>(this));
    QCOMPARE(p1, QPointer<QObject>(p2));

    // Test assignment with a null pointer
    p1 = 0;
    p2 = p1;
    QCOMPARE(p1, QPointer<QObject>(0));
    QCOMPARE(p2, QPointer<QObject>(0));
    QCOMPARE(p1, QPointer<QObject>(p2));

    // Test assignment with a real QObject pointer
    QObject *object = new QObject;

    p1 = object;
    p2 = p1;
    QCOMPARE(p1, QPointer<QObject>(object));
    QCOMPARE(p2, QPointer<QObject>(object));
    QCOMPARE(p1, QPointer<QObject>(p2));

    // Test assignment with the same pointer that's already guarded
    p1 = object;
    p2 = p1;
    QCOMPARE(p1, QPointer<QObject>(object));
    QCOMPARE(p2, QPointer<QObject>(object));
    QCOMPARE(p1, QPointer<QObject>(p2));

    // Cleanup
    delete object;
}

void tst_QPointer::equality_operators()
{
    QPointer<QObject> p1;
    QPointer<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_QPointer::isNull()
{
    QPointer<QObject> p1;
    QVERIFY(p1.isNull());
    p1 = this;
    QVERIFY(!p1.isNull());
    p1 = 0;
    QVERIFY(p1.isNull());
}

void tst_QPointer::dereference_operators()
{
    QPointer<tst_QPointer> p1 = this;
    QPointer<tst_QPointer> p2;

    // operator->() -- only makes sense if not null
    QObject *object = p1->me();
    QCOMPARE(object, this);

    // operator*() -- only makes sense if not null
    QObject &ref = *p1;
    QCOMPARE(&ref, this);

    // operator T*()
    QCOMPARE(static_cast<QObject *>(p1), this);
    QCOMPARE(static_cast<QObject *>(p2), static_cast<QObject *>(0));

    // data()
    QCOMPARE(p1.data(), this);
    QCOMPARE(p2.data(), static_cast<QObject *>(0));
}

void tst_QPointer::disconnect()
{
    // Verify that pointer remains guarded when all signals are disconencted.
    QPointer<QObject> p1 = new QObject;
    QVERIFY(!p1.isNull());
    p1->disconnect();
    QVERIFY(!p1.isNull());
    delete static_cast<QObject *>(p1);
    QVERIFY(p1.isNull());
}

class ChildObject : public QObject
{
    QPointer<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
{
    QPointer<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;
    QPointer<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_QPointer::castDuringDestruction()
{
    {
        QObject *parentObject = new QObject();
        (void) new ChildObject(parentObject);
        delete parentObject;
    }

    {
        QWidget *parentWidget = new QWidget();
        (void) new ChildWidget(parentWidget);
        delete parentWidget;
    }

    {
        delete new DerivedParent();
    }
}

class TestRunnable : public QObject, public QRunnable {
    void run() {
        QPointer<QObject> obj1 = new QObject;
        QPointer<QObject> obj2 = new QObject;
        obj1->moveToThread(thread()); // this is the owner thread
        obj1->deleteLater(); // the delete will happen in the owner thread
        obj2->moveToThread(thread()); // this is the owner thread
        obj2->deleteLater(); // the delete will happen in the owner thread
    }
};

void tst_QPointer::threadSafety()
{

    QThread owner;
    owner.start();

    QThreadPool pool;
    for (int i = 0; i < 300; i++) {
        QPointer<TestRunnable> task = new TestRunnable;
        task->setAutoDelete(true);
        task->moveToThread(&owner);
        pool.start(task);
    }
    pool.waitForDone();

    owner.quit();
    owner.wait();
}


QTEST_MAIN(tst_QPointer)
#include "tst_qpointer.moc"