Revision control
Copy as Markdown
// Copyright (C) 2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Volker Krause <volker.krause@kdab.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QTest>
#include <QtCore/private/qhooks_p.h>
class tst_QHooks: public QObject
{
Q_OBJECT
private slots:
void cleanup();
void testVersion();
void testAddRemoveObject();
void testChaining();
};
void tst_QHooks::cleanup()
{
qtHookData[QHooks::AddQObject] = 0;
qtHookData[QHooks::RemoveQObject] = 0;
}
void tst_QHooks::testVersion()
{
QVERIFY(qtHookData[QHooks::HookDataVersion] >= 3);
QCOMPARE(qtHookData[QHooks::HookDataSize], (quintptr)QHooks::LastHookIndex);
QCOMPARE(qtHookData[QHooks::QtVersion], (quintptr)QT_VERSION);
}
static int objectCount = 0;
static void objectAddHook(QObject*)
{
++objectCount;
}
static void objectRemoveHook(QObject*)
{
--objectCount;
}
void tst_QHooks::testAddRemoveObject()
{
QCOMPARE(qtHookData[QHooks::AddQObject], (quintptr)0);
QCOMPARE(qtHookData[QHooks::RemoveQObject], (quintptr)0);
qtHookData[QHooks::AddQObject] = (quintptr)&objectAddHook;
qtHookData[QHooks::RemoveQObject] = (quintptr)&objectRemoveHook;
QCOMPARE(objectCount, 0);
QObject *obj = new QObject;
QVERIFY(objectCount > 0);
delete obj;
QCOMPARE(objectCount, 0);
}
static QList<QString> hookOrder;
static QHooks::AddQObjectCallback existingAddHook = 0;
static QHooks::RemoveQObjectCallback existingRemoveHook = 0;
static void firstAddHook(QObject *)
{
hookOrder.append(QLatin1String("firstAddHook"));
}
static void firstRemoveHook(QObject *)
{
hookOrder.append(QLatin1String("firstRemoveHook"));
}
static void secondAddHook(QObject *object)
{
if (existingAddHook)
existingAddHook(object);
hookOrder.append(QLatin1String("secondAddHook"));
}
static void secondRemoveHook(QObject *object)
{
if (existingRemoveHook)
existingRemoveHook(object);
hookOrder.append(QLatin1String("secondRemoveHook"));
}
// Tests that it's possible to "chain" hooks together (i.e. have multiple hooks)
void tst_QHooks::testChaining()
{
QCOMPARE(qtHookData[QHooks::AddQObject], (quintptr)0);
QCOMPARE(qtHookData[QHooks::RemoveQObject], (quintptr)0);
// Set the add and remove hooks (could just skip this and go straight to the next step,
// but it's for illustrative purposes).
qtHookData[QHooks::AddQObject] = (quintptr)&firstAddHook;
qtHookData[QHooks::RemoveQObject] = (quintptr)&firstRemoveHook;
// Store them so that we can call them later.
existingAddHook = reinterpret_cast<QHooks::AddQObjectCallback>(qtHookData[QHooks::AddQObject]);
existingRemoveHook = reinterpret_cast<QHooks::RemoveQObjectCallback>(qtHookData[QHooks::RemoveQObject]);
// Overide them with hooks that call them first.
qtHookData[QHooks::AddQObject] = (quintptr)&secondAddHook;
qtHookData[QHooks::RemoveQObject] = (quintptr)&secondRemoveHook;
QObject *obj = new QObject;
QCOMPARE(hookOrder.size(), 2);
QCOMPARE(hookOrder.at(0), QLatin1String("firstAddHook"));
QCOMPARE(hookOrder.at(1), QLatin1String("secondAddHook"));
delete obj;
QCOMPARE(hookOrder.size(), 4);
QCOMPARE(hookOrder.at(2), QLatin1String("firstRemoveHook"));
QCOMPARE(hookOrder.at(3), QLatin1String("secondRemoveHook"));
hookOrder.clear();
}
QTEST_APPLESS_MAIN(tst_QHooks)
#include "tst_qhooks.moc"