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//! [0]
QCheckBox *box = ...;
QSignalSpy spy(box, SIGNAL(clicked(bool)));
// do something that triggers the signal
box->animateClick();
QCOMPARE(spy.count(), 1); // make sure the signal was emitted exactly one time
QList<QVariant> arguments = spy.takeFirst(); // take the first signal
QVERIFY(arguments.at(0).toBool() == true); // verify the first argument
//! [0]
//! [1]
QSignalSpy spy(myCustomObject, SIGNAL(mySignal(int, QString, double)));
myCustomObject->doSomething(); // trigger emission of the signal
QList<QVariant> arguments = spy.takeFirst();
QVERIFY(arguments.at(0).type() == QVariant::Int);
QVERIFY(arguments.at(1).type() == QVariant::QString);
QVERIFY(arguments.at(2).type() == QVariant::double);
//! [1]
//! [2]
qRegisterMetaType<QModelIndex>("QModelIndex");
QSignalSpy spy(&model, SIGNAL(whatever(QModelIndex)));
//! [2]
//! [3]
// get the first argument from the first received signal:
QModelIndex result = qvariant_cast<QModelIndex>(spy.at(0).at(0));
//! [3]
//! [4]
QSignalSpy spy(myPushButton, SIGNAL(clicked(bool)));
//! [4]
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