158     void historyStateAfterRestart();

   908 }

   909 

   910 void tst_QStateMachine::historyStateAfterRestart()

   911 {

   912     // QTBUG-8842

   913     QStateMachine machine;

   914 

   915     QState *s1 = new QState(&machine);

   916     machine.setInitialState(s1);

   917     QState *s2 = new QState(&machine);

   918     QState *s21 = new QState(s2);

   919     QState *s22 = new QState(s2);

   920     QHistoryState *s2h = new QHistoryState(s2);

   921     s2h->setDefaultState(s21);

   922     s1->addTransition(new EventTransition(QEvent::User, s2h));

   923     s21->addTransition(new EventTransition(QEvent::User, s22));

   924     s2->addTransition(new EventTransition(QEvent::User, s1));

   925 

   926     for (int x = 0; x < 2; ++x) {

   927         QSignalSpy startedSpy(&machine, SIGNAL(started()));

   928         machine.start();

   929         QTRY_COMPARE(startedSpy.count(), 1);

   930         QCOMPARE(machine.configuration().count(), 1);

   931         QVERIFY(machine.configuration().contains(s1));

   932 

   933         // s1 -> s2h -> s21 (default state)

   934         machine.postEvent(new QEvent(QEvent::User));

   935         QCoreApplication::processEvents();

   936         QCOMPARE(machine.configuration().count(), 2);

   937         QVERIFY(machine.configuration().contains(s2));

   938         // This used to fail on the 2nd run because the

   939         // history had not been cleared.

   940         QVERIFY(machine.configuration().contains(s21));

   941 

   942         // s21 -> s22

   943         machine.postEvent(new QEvent(QEvent::User));

   944         QCoreApplication::processEvents();

   945         QCOMPARE(machine.configuration().count(), 2);

   946         QVERIFY(machine.configuration().contains(s2));

   947         QVERIFY(machine.configuration().contains(s22));

   948 

   949         // s2 -> s1 (s22 saved in s2h)

   950         machine.postEvent(new QEvent(QEvent::User));

   951         QCoreApplication::processEvents();

   952         QCOMPARE(machine.configuration().count(), 1);

   953         QVERIFY(machine.configuration().contains(s1));

   954 

   955         // s1 -> s2h -> s22 (saved state)

   956         machine.postEvent(new QEvent(QEvent::User));

   957         QCoreApplication::processEvents();

   958         QCOMPARE(machine.configuration().count(), 2);

   959         QVERIFY(machine.configuration().contains(s2));

   960         QVERIFY(machine.configuration().contains(s22));

   961 

   962         QSignalSpy stoppedSpy(&machine, SIGNAL(stopped()));

   963         machine.stop();

   964         QTRY_COMPARE(stoppedSpy.count(), 1);

   965     }