tst_QApplication::testDeleteLaterProcessEvents(): Split the test

The test can trigger timeouts in COIN, split into subtests.

Change-Id: I1fa5d52422275f89b2858d90c5979632aa7058e2
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp

@@ -93,7 +93,11 @@ private slots:
     void quitOnLastWindowClosed();
     void closeAllWindows();
     void testDeleteLater();
-    void testDeleteLaterProcessEvents();
+    void testDeleteLaterProcessEvents1();
+    void testDeleteLaterProcessEvents2();
+    void testDeleteLaterProcessEvents3();
+    void testDeleteLaterProcessEvents4();
+    void testDeleteLaterProcessEvents5();
 
 #if QT_CONFIG(library)
     void libraryPaths();
@@ -1333,10 +1337,8 @@ public slots:
     }
 };
 
-void tst_QApplication::testDeleteLaterProcessEvents()
+void tst_QApplication::testDeleteLaterProcessEvents1()
 {
-    int argc = 0;
-
     // Calling processEvents() with no event dispatcher does nothing.
     QObject *object = new QObject;
     QPointer<QObject> p(object);
@@ -1344,14 +1346,17 @@ void tst_QApplication::testDeleteLaterProcessEvents()
     QApplication::processEvents();
     QVERIFY(p);
     delete object;
+}
 
+void tst_QApplication::testDeleteLaterProcessEvents2()
 {
+    int argc = 0;
     QApplication app(argc, nullptr);
     // If you call processEvents() with an event dispatcher present, but
     // outside any event loops, deferred deletes are not processed unless
     // sendPostedEvents(0, DeferredDelete) is called.
-        object = new QObject;
+    auto object = new QObject;
-        p = object;
+    QPointer<QObject> p(object);
     object->deleteLater();
     QCoreApplication::processEvents();
     QVERIFY(p);
@@ -1369,14 +1374,17 @@ void tst_QApplication::testDeleteLaterProcessEvents()
     loop.exec();
     QVERIFY(!p);
 }
+
+void tst_QApplication::testDeleteLaterProcessEvents3()
 {
+    int argc = 0;
     // When an object is in an event loop, then calls deleteLater() and enters
     // an event loop recursively, it should not die until the parent event
     // loop continues.
     QApplication app(argc, nullptr);
     QEventLoop loop;
     EventLoopNester *nester = new EventLoopNester;
-        p = nester;
+    QPointer<QObject> p(nester);
     QTimer::singleShot(3000, &loop, &QEventLoop::quit);
     QTimer::singleShot(0, nester, &EventLoopNester::deleteLaterAndEnterLoop);
 
@@ -1384,14 +1392,16 @@ void tst_QApplication::testDeleteLaterProcessEvents()
     QVERIFY(!p);
 }
 
+void tst_QApplication::testDeleteLaterProcessEvents4()
 {
+    int argc = 0;
     // When the event loop that calls deleteLater() is exited
     // immediately, the object should die when returning to the
     // parent event loop
     QApplication app(argc, nullptr);
     QEventLoop loop;
     EventLoopNester *nester = new EventLoopNester;
-        p = nester;
+    QPointer<QObject> p(nester);
     QTimer::singleShot(3000, &loop, &QEventLoop::quit);
     QTimer::singleShot(0, nester, &EventLoopNester::deleteLaterAndExitLoop);
 
@@ -1399,21 +1409,22 @@ void tst_QApplication::testDeleteLaterProcessEvents()
     QVERIFY(!p);
 }
 
+void tst_QApplication::testDeleteLaterProcessEvents5()
 {
     // when the event loop that calls deleteLater() also calls
     // processEvents() immediately afterwards, the object should
     // not die until the parent loop continues
+    int argc = 0;
     QApplication app(argc, nullptr);
     QEventLoop loop;
     EventLoopNester *nester = new EventLoopNester();
-        p = nester;
+    QPointer<QObject> p(nester);
     QTimer::singleShot(3000, &loop, &QEventLoop::quit);
     QTimer::singleShot(0, nester, &EventLoopNester::deleteLaterAndProcessEvents);
 
     loop.exec();
     QVERIFY(!p);
 }
-}
 
 /*
     Test for crash with QApplication::setDesktopSettingsAware(false).