Test signal with my own class

Question

I have some class which can emit some signal with another my class. Example:

class CMyClass : public QBytaArray
{
    void SomeAction();
}

class CMainClass : public QObject
{
    signals:
        void testSignal(const CMyClass &myClass);

    public:
        void test() {
          CMyClass data;  
          emit testSignal(data);
        }
}

I wrote unix test for CMainClass:

header:

#ifndef TESTMAINCLASS_H
#define TESTMAINCLASS_H

#include <QObject>
#include <QSignalSpy>

#include "MainClass.h"

Q_DECLARE_METATYPE(CMyClass)

class CTestMainClass : public QObject
{
  Q_OBJECT
public:
  explicit CTestMainClass(QObject *parent = 0);

private slots:
  void testS();
};

#endif // TESTMAINCLASS_H

Source:

#include <QDebug>

#include "TestMainClass.h"

CTestMainClass::CTestMainClass(QObject *parent) : QObject(parent)
{
  qRegisterMetaType<CMyClass>();
}

void CTestMainClass::testS()
{
  qDebug() << "Test signal emitor";
  CMainClass prc;

  QSignalSpy spy(&prc, SIGNAL(testSignal(const CMyClass&)));
  prc.test();


  CMyClass buf = qvariant_cast<CMyClass>(spy.at(0).at(0));

}

But, in log file I've got:

PASS : CTestCommandProcessor::initTestCase() QDEBUG : CTestCommandProcessor::testS() Test signal emitor QDEBUG : CTestCommandProcessor::testS() Count: 1 QDEBUG : CTestCommandProcessor::testS() Vals: QVariant(CMyClass, ) A crash occurred in C:\UnitTest\build-UnitTest-Qt_5_7_1_5_7_1_Static-Release\release\UnitTest.exe. Function time: 0ms Total time: 0ms

I've tried to change string:

CMyClass buf = qvariant_cast< CMyClass >(spy.at(0).at(0));

to

CMyClass buf = qvariant_cast< const CMyClass& >(spy.at(0).at(0));

But, I was getting the same error. What is wrong? Can I use in Qt's unittest signals with my own classes?

Answer 1

I'm so sory, this is my bad. I used takeFirst() method of spy. And after that spy's object doesn't have signals anymore.