Plug remaining leaks in tests/auto/widgets/kernel

The usual:

- delete return values of QLayout::takeAt(), replaceWidget()
- delete styles
- delete top-level widgets
- delete actions

Either by naked delete, QScopedPointer or allocation on the
stack instead of the heap.

This fixes the remaining errors in GCC 6.1 Linux ASan runs of
tests/auto/widgets/kernel.

Change-Id: I8cc217be114b2e0edf34ad8d60dbf722f900bb7f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

tests/auto/widgets/kernel/qaction/tst_qaction.cpp

@@ -329,7 +329,7 @@ void tst_QAction::enabledVisibleInteraction()
 
 void tst_QAction::task200823_tooltip()
 {
-    QAction *action = new QAction("foo", 0);
+    const QScopedPointer<QAction> action(new QAction("foo", Q_NULLPTR));
     QString shortcut("ctrl+o");
     action->setShortcut(shortcut);
 
@@ -343,8 +343,8 @@ void tst_QAction::task200823_tooltip()
 void tst_QAction::task229128TriggeredSignalWithoutActiongroup()
 {
     // test without a group
-    QAction *actionWithoutGroup = new QAction("Test", qApp);
-    QSignalSpy spyWithoutGroup(actionWithoutGroup, SIGNAL(triggered(bool)));
+    const QScopedPointer<QAction> actionWithoutGroup(new QAction("Test", Q_NULLPTR));
+    QSignalSpy spyWithoutGroup(actionWithoutGroup.data(), SIGNAL(triggered(bool)));
     QCOMPARE(spyWithoutGroup.count(), 0);
     actionWithoutGroup->trigger();
     // signal should be emitted

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

@@ -2211,8 +2211,8 @@ void tst_QApplication::noQuitOnHide()
 {
     int argc = 0;
     QApplication app(argc, 0);
-    QWidget *window1 = new NoQuitOnHideWidget;
-    window1->show();
+    NoQuitOnHideWidget window1;
+    window1.show();
     QCOMPARE(app.exec(), 1);
 }
 
@@ -2246,12 +2246,12 @@ void tst_QApplication::abortQuitOnShow()
 {
     int argc = 0;
     QApplication app(argc, 0);
-    QWidget *window1 = new ShowCloseShowWidget(false);
-    window1->show();
+    ShowCloseShowWidget window1(false);
+    window1.show();
     QCOMPARE(app.exec(), 0);
 
-    QWidget *window2 = new ShowCloseShowWidget(true);
-    window2->show();
+    ShowCloseShowWidget window2(true);
+    window2.show();
     QCOMPARE(app.exec(), 1);
 }
 

tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp

@@ -395,7 +395,8 @@ void tst_QFormLayout::setFormStyle()
     QCOMPARE(layout.rowWrapPolicy(), QFormLayout::DontWrapRows);
 #endif
 
-    widget.setStyle(QStyleFactory::create("windows"));
+    const QScopedPointer<QStyle> windowsStyle(QStyleFactory::create("windows"));
+    widget.setStyle(windowsStyle.data());
 
     QCOMPARE(layout.labelAlignment(), Qt::AlignLeft);
     QVERIFY(layout.formAlignment() == (Qt::AlignLeft | Qt::AlignTop));
@@ -406,14 +407,16 @@ void tst_QFormLayout::setFormStyle()
        this test is cross platform.. so create dummy styles that
        return all the right stylehints.
      */
-    widget.setStyle(new DummyMacStyle());
+    DummyMacStyle macStyle;
+    widget.setStyle(&macStyle);
 
     QCOMPARE(layout.labelAlignment(), Qt::AlignRight);
     QVERIFY(layout.formAlignment() == (Qt::AlignHCenter | Qt::AlignTop));
     QCOMPARE(layout.fieldGrowthPolicy(), QFormLayout::FieldsStayAtSizeHint);
     QCOMPARE(layout.rowWrapPolicy(), QFormLayout::DontWrapRows);
 
-    widget.setStyle(new DummyQtopiaStyle());
+    DummyQtopiaStyle qtopiaStyle;
+    widget.setStyle(&qtopiaStyle);
 
     QCOMPARE(layout.labelAlignment(), Qt::AlignRight);
     QVERIFY(layout.formAlignment() == (Qt::AlignLeft | Qt::AlignTop));
@@ -891,7 +894,7 @@ void tst_QFormLayout::takeAt()
     QCOMPARE(layout->count(), 7);
 
     for (int i = 6; i >= 0; --i) {
-        layout->takeAt(0);
+        delete layout->takeAt(0);
         QCOMPARE(layout->count(), i);
     }
 }
@@ -983,7 +986,7 @@ void tst_QFormLayout::replaceWidget()
     QFormLayout::ItemRole role;
 
     // replace editor
-    layout->replaceWidget(edit1, edit3);
+    delete layout->replaceWidget(edit1, edit3);
     edit1->hide(); // Not strictly needed for the test, but for normal usage it is.
     QCOMPARE(layout->indexOf(edit1), -1);
     QCOMPARE(layout->indexOf(edit3), editIndex);
@@ -994,7 +997,7 @@ void tst_QFormLayout::replaceWidget()
     QCOMPARE(rownum, 0);
     QCOMPARE(role, QFormLayout::FieldRole);
 
-    layout->replaceWidget(label1, label2);
+    delete layout->replaceWidget(label1, label2);
     label1->hide();
     QCOMPARE(layout->indexOf(label1), -1);
     QCOMPARE(layout->indexOf(label2), labelIndex);