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28
29
30#include <QtTest/QtTest>
31#include <QtCore/private/qhooks_p.h>
32
33class tst_QHooks: public QObject
34{
35 Q_OBJECT
36
37private slots:
38 void cleanup();
39 void testVersion();
40 void testAddRemoveObject();
41 void testChaining();
42};
43
44void tst_QHooks::cleanup()
45{
46 qtHookData[QHooks::AddQObject] = 0;
47 qtHookData[QHooks::RemoveQObject] = 0;
48}
49
50void tst_QHooks::testVersion()
51{
52 QVERIFY(qtHookData[QHooks::HookDataVersion] >= 3);
53 QCOMPARE(qtHookData[QHooks::HookDataSize], (quintptr)QHooks::LastHookIndex);
54 QCOMPARE(qtHookData[QHooks::QtVersion], (quintptr)QT_VERSION);
55}
56
57static int objectCount = 0;
58
59static void objectAddHook(QObject*)
60{
61 ++objectCount;
62}
63
64static void objectRemoveHook(QObject*)
65{
66 --objectCount;
67}
68
69void tst_QHooks::testAddRemoveObject()
70{
71 QCOMPARE(qtHookData[QHooks::AddQObject], (quintptr)0);
72 QCOMPARE(qtHookData[QHooks::RemoveQObject], (quintptr)0);
73
74 qtHookData[QHooks::AddQObject] = (quintptr)&objectAddHook;
75 qtHookData[QHooks::RemoveQObject] = (quintptr)&objectRemoveHook;
76
77 QCOMPARE(objectCount, 0);
78 QObject *obj = new QObject;
79 QVERIFY(objectCount > 0);
80 delete obj;
81 QCOMPARE(objectCount, 0);
82}
83
84static QVector<QString> hookOrder;
85
86static QHooks::AddQObjectCallback existingAddHook = 0;
87static QHooks::RemoveQObjectCallback existingRemoveHook = 0;
88
89static void firstAddHook(QObject *)
90{
91 hookOrder.append(t: QLatin1String("firstAddHook"));
92}
93
94static void firstRemoveHook(QObject *)
95{
96 hookOrder.append(t: QLatin1String("firstRemoveHook"));
97}
98
99static void secondAddHook(QObject *object)
100{
101 if (existingAddHook)
102 existingAddHook(object);
103
104 hookOrder.append(t: QLatin1String("secondAddHook"));
105}
106
107static void secondRemoveHook(QObject *object)
108{
109 if (existingRemoveHook)
110 existingRemoveHook(object);
111
112 hookOrder.append(t: QLatin1String("secondRemoveHook"));
113}
114
115// Tests that it's possible to "chain" hooks together (i.e. have multiple hooks)
116void tst_QHooks::testChaining()
117{
118 QCOMPARE(qtHookData[QHooks::AddQObject], (quintptr)0);
119 QCOMPARE(qtHookData[QHooks::RemoveQObject], (quintptr)0);
120
121 // Set the add and remove hooks (could just skip this and go straight to the next step,
122 // but it's for illustrative purposes).
123 qtHookData[QHooks::AddQObject] = (quintptr)&firstAddHook;
124 qtHookData[QHooks::RemoveQObject] = (quintptr)&firstRemoveHook;
125
126 // Store them so that we can call them later.
127 existingAddHook = reinterpret_cast<QHooks::AddQObjectCallback>(qtHookData[QHooks::AddQObject]);
128 existingRemoveHook = reinterpret_cast<QHooks::RemoveQObjectCallback>(qtHookData[QHooks::RemoveQObject]);
129
130 // Overide them with hooks that call them first.
131 qtHookData[QHooks::AddQObject] = (quintptr)&secondAddHook;
132 qtHookData[QHooks::RemoveQObject] = (quintptr)&secondRemoveHook;
133
134 QObject *obj = new QObject;
135 QCOMPARE(hookOrder.size(), 2);
136 QCOMPARE(hookOrder.at(0), QLatin1String("firstAddHook"));
137 QCOMPARE(hookOrder.at(1), QLatin1String("secondAddHook"));
138 delete obj;
139 QCOMPARE(hookOrder.size(), 4);
140 QCOMPARE(hookOrder.at(2), QLatin1String("firstRemoveHook"));
141 QCOMPARE(hookOrder.at(3), QLatin1String("secondRemoveHook"));
142
143 hookOrder.clear();
144}
145
146QTEST_APPLESS_MAIN(tst_QHooks)
147#include "tst_qhooks.moc"
148

source code of qtbase/tests/auto/corelib/global/qhooks/tst_qhooks.cpp