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/***************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (directui@nokia.com)
**
** This file is part of libmeegotouch.
**
** If you have questions regarding the use of this file, please contact
** Nokia at directui@nokia.com.
**
** This library is free software; you can redistribute it and/or
** modify it 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.
**
****************************************************************************/
#ifndef TESTS_UTILS_H
#define TESTS_UTILS_H
#include <QtTest>
namespace Ut_Utils
{
/*! Generic signal waiter, because signals might not arrive instantly.
*
* How to use:
*
* QObject *obj = new QObject;
* QSignalSpy spy(obj, SIGNAL(destroyed()));
* delete obj;
* Ut_Utils::waitForSignal(spy);
*/
void waitForSignal(const QSignalSpy &spy, int waitLimit = 10)
{
int waitCount = 0;
while (spy.count() < 1) {
++ waitCount;
if (waitCount > waitLimit) {
qCritical() << "Signal didn't arrive: "
<< spy.signal();
break;
}
QTest::qWait(100);
}
}
}
/*! An automated tester for common methods (and their expected behaviour),
* e.g., don't choke on self-assignment.
* TODO: add more common tests.
*
* How to use:
*
* MSetterTester<TesteeType, SetterParamType> tester(testee
* &TesteeType::setParam,
* &TesteeType::param);
* tester.set(new SetterParamType);
*
* TesteeType and SetterParamType must match the type where the function
* pointers were first declared, i.e., for non-virtual methods the most basic
* class that implements them.
*
* See Ut_MTextEdit::testSetters for an example.
*/
template<class T>
class MAbstractTester
{
public:
virtual void set(T *arg, bool checkAccidientialDestruction = true) = 0;
virtual void setReparents(T *arg, bool takesOwnership = true) = 0;
virtual T * get() = 0;
};
template <class R, class T>
class MSetterTester
: public MAbstractTester<T>
{
public:
MSetterTester(R *newObj,
void (R::*newSetterFunction)(T *arg),
T * (R::*newGetterFunction)())
: setterFunction(newSetterFunction)
, getterFunction(newGetterFunction)
, obj(newObj)
{}
virtual void set(T *arg, bool checkAccidentialDestruction = true)
{
(*obj.*setterFunction)(arg);
QCOMPARE(arg, get());
if (checkAccidentialDestruction) {
// Setting arg again should not lead to its destruction, but some
// getters cleanup whatever was previously set, and maybe forget
// to guard against self-assignment:
(*obj.*setterFunction)(arg);
delete arg;
}
}
virtual void setReparents(T *arg, bool takesOwnership = true)
{
QObject *arg2q = dynamic_cast<QObject *>(arg);
QObject *obj2q = dynamic_cast<QObject *>(obj);
if (arg2q && obj2q) {
QObject *lastParent = arg2q->parent();
arg2q->setParent(0);
(*obj.*setterFunction)(arg);
QCOMPARE(arg2q->parent(), (takesOwnership ? obj2q : 0));
arg2q->setParent(lastParent);
} else {
qWarning() << __PRETTY_FUNCTION__
<< "Cannot test ownership transferal: no QObjects";
}
}
virtual void setDoesNotReparent(T *arg)
{
setReparents(arg, false);
}
virtual T* get()
{
return (*obj.*getterFunction)();
}
private:
void (R::*setterFunction)(T *arg);
T * (R::*getterFunction)();
R *obj;
};
#endif // TEST_UTILS_H
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