QSignalSpy等待和两个信号

Question

我正在尝试在基于Qt的项目中编写一个单元测试(Qt 5,C++ 03).

class Transaction { // This is just a sample class
//..
public signals:
   void succeeded();
   void failed();
}

Transaction* transaction = new Transaction(this);
QSignalSpy spy(transaction, SIGNAL(succeeded()));
transaction->run();
spy.wait(5000); // wait for 5 seconds

我希望我的测试运行得更快.如果交易失败,如何wait()在failed()发出信号后中断此呼叫？

我没有在QSignalSpy类中看到任何可用的插槽.

我应该使用QEventLoop代替？

Answer 1

您可能不得不使用循环并手动调用,QTest::qWait()而两个信号都没有发出:

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);

Answer 2

解决方案QTestEventLoop：

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

使用计时器和解决方案QEventLoop：

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);