Testing Qt application with Qt Test - qt

Question

I have looked at the 5 Qt testing examples including the one about GUI events, but these examples are way too simple.
I want to test my program by launching it, simulating some clicks, and checking the value of instance variables that have been changed by those clicks.
I assume that this test below is illogical: a.exec() blocks the thread until the program is closed, and when the program is closed w has been deleted I think (or will be deleted later?).
So how to write system/GUI tests?
My test:
void LaunchProgramTest::LaunchProgramTestFunction() {
QApplication a(argc, argv);
MainWindow *w = new MainWindow();
w->show();
a.exec();
int testResult = w->myTestFunction();
qDebug() << testResult; //Prints big numbers like "-17891602" or "1753770528" as if testResult was not initialized
QVERIFY2(testResult == 3, "Incorrectly changed");
}
In mainWindow.h I declared a variable:
int testValue;
Mainwindow.cpp is the class for the main GUI of the program. In the constructor I added
testValue = 2;
Then in a function that is executed upon events I wrote
void MainWindow::on_actionTest_clicked() {
testValue = 3;
}

Answer 1

enter code hereSo)) you need to add QTest, add .pro
QT += testlib
and
#include <QTest>
I will show an example of my implementation for MousePress, the rest you can do yourself))
struct EventMK
{
int type;
QString m_widPath;
int _timer;
int width;
int height;
QPoint p;
QPoint g;
int button;
int buttons;
int modifiers;
int _key;
QString text;
void print(){
qDebug()<<"{ \n"
<<"type "<< type<<","<<"\n"
<<"Widget_Path "<< m_widPath<<","<<"\n"
<<"Timer "<< _timer<<","<<"\n"
<<"Width "<< width<<","<<"\n"
<<"Height "<< height<<","<<"\n"
<<"Pos_x "<< p.x()<<","<<"\n"
<<"Pos_y "<< p.y()<<","<<"\n"
<<"Global_x "<< g.x()<<","<<"\n"
<<"Global_y "<< g.y()<<","<<"\n"
<<"Button "<< button<<","<<"\n"
<<"Buttons "<< buttons<<","<<"\n"
<<"Modifiers "<< modifiers<<","<<"\n"
<<"Key "<< _key<<","<<"\n"
<<"Text "<< text<<"\n"
<<"}\n";
}
};
QWidget * _getWidget(EventMK ev)
{
QString wname = ev.m_widPath;
QStringList wpath = wname.split ( "/" );
return QWidgetUtils::getAWidget(&wpath);
}
void _postExecution(EventMK ev, QWidget *widget)
{
if (widget){
//set focus
QWidgetUtils::setFocusOnWidget(widget);
//end simulation
widget->setUpdatesEnabled ( true );
widget->update();
}
}
QPoint adaptedPosition(EventMK ev, QWidget *w)
{
if (w == nullptr)
return QPoint(ev.p.x(), ev.p.y());
int orig_w = ev.width;
int orig_h = ev.height;
int curr_w = w->width();
int curr_h = w->height();
int new_x = ev.p.x() * curr_w / orig_w;
int new_y = ev.p.y() * curr_h / orig_h;
return QPoint(new_x, new_y);
}
and function implementation
void executeMousePressEvent(EventMK ev)
{
QWidget* widget = _getWidget(ev);
if ( widget == nullptr )
{
qDebug()<<"error: "<<__LINE__<<__FUNCTION__;
return;
}
// _preExecutionWithMouseMove(ev, widget);
if (widget){
QTest::mousePress ( widget, (Qt::MouseButton)ev.button ,
(Qt::KeyboardModifier) ev.modifiers,
adaptedPosition(ev,widget));
}
_postExecution(ev, widget);
}
now left to fill struct EventMK , you need to populate it from MouseButtonPress events.
Here is my example
bool eventFilter(QObject *obj, QEvent *event)
{
///
/// process control
///
//window events
if (event->type() == QEvent::KeyPress)
{
handleKeyPressEvent(obj, event);
}
//mouse events
else if (event->type() == QEvent::MouseButtonPress)
{
handleMousePressEvent(obj, event);
}
else if (event->type() == QEvent::MouseButtonRelease)
{
handleMouseReleaseEvent(obj, event);
}
else if (event->type() == QEvent::MouseButtonDblClick)
{
handleMouseDoubleEvent(obj, event);
}
else if (event->type() == QEvent::Wheel)
{
handleWheelEvent(obj, event);
}
//keyboard events
else if (event->type() == QEvent::Close)
{
handleCloseEvent(obj, event);
}
///the event should continue to reach its goal...
return false;
}
and
void handleMousePressEvent(QObject *obj, QEvent *event)
{
QWidget *widget = isValidWidget(obj);
if (!widget){
return;
}
QMouseEvent *me = dynamic_cast< QMouseEvent*> ( event );
//create the event
if (widget != nullptr){
EventMK evkm;
evkm.type = QOE_MOUSE_PRESS; // set your type
evkm._timer = _timer.restart(); // add your QElapsedTimer
evkm.m_widPath = QWidgetUtils::getWidgetPath(widget);
evkm. width = widget->width();
evkm. height = widget->height();
QPoint p ( me->pos() );
QPoint g = widget->mapToGlobal ( p );
evkm. p = p;
evkm. g = g;
evkm. button = me->button();
evkm. buttons = me->buttons();
evkm. modifiers = me->modifiers();
evkm.print();
}
//send event if EventMK is valid
}
so, it turns out we can write a scenario and run what you wanted, thanks