C++ QSignalSpy等待和两个信号

我正在尝试为基于Qt的项目（qt5，C++03）中的类编写单元测试

我希望我的测试运行得更快。 如果事务失败，如何在发出信号

failed（）

后中断此

wait（）

调用

我在QSignalSpy类中没有看到任何可用的插槽

---

我应该改用QEventLoop吗？

当两个信号都没有发出时，您可能必须使用循环和手动调用：

QSignalSpy succeededSpy(transaction, SIGNAL(succeeded()));
QSignalSpy failedSpy(transaction, SIGNAL(failed()));
for (int waitDelay = 5000; waitDelay > 0 && succeededSpy.count() == 0 && failedSpy.count() == 0; waitDelay -= 100) {
    QTest::qWait(100);
}

QCOMPARE(succeededSpy.count(), 1);

---

使用

QTestEventLoop的解决方案

：

QTestEventLoop loop;
QObject::connect(transaction, SIGNAL(succeeded()), &loop, SLOT(exitLoop()));
QObject::connect(transaction, SIGNAL(failed()), &loop, SLOT(exitLoop()));
transaction->run();
loop.enterLoopMSecs(3000);

Transaction* transaction = new Transaction(this);
QSignalSpy spy(transaction, SIGNAL(succeeded()));  
QEventLoop loop;  
QTimer timer;
QObject::connect(transaction, SIGNAL(succeeded()), &loop, SLOT(quit()));
QObject::connect(transaction, SIGNAL(failed()), &loop, SLOT(quit()));
QObject::connect(&timer, SIGNAL(timeout()), &loop, SLOT(quit()));
timer.start(3000);
loop.exec();
transaction->run();
QCOMPARE(spy.count(), 1);

带有计时器和

QEventLoop

的解决方案：

QTestEventLoop loop;
QObject::connect(transaction, SIGNAL(succeeded()), &loop, SLOT(exitLoop()));
QObject::connect(transaction, SIGNAL(failed()), &loop, SLOT(exitLoop()));
transaction->run();
loop.enterLoopMSecs(3000);

Transaction* transaction = new Transaction(this);
QSignalSpy spy(transaction, SIGNAL(succeeded()));  
QEventLoop loop;  
QTimer timer;
QObject::connect(transaction, SIGNAL(succeeded()), &loop, SLOT(quit()));
QObject::connect(transaction, SIGNAL(failed()), &loop, SLOT(quit()));
QObject::connect(&timer, SIGNAL(timeout()), &loop, SLOT(quit()));
timer.start(3000);
loop.exec();
transaction->run();
QCOMPARE(spy.count(), 1);

---

如果发出

suceeded（）

和

failed（）

的代码已经依赖于Qt的事件循环，我认为这是行不通的。您不使用Qt的事件循环吗？如果您在没有参数的情况下调用spy.wait（），它将在5000毫秒内发出信号后立即返回true。你不需要等待5000毫秒。