tst_QDataWidgetMapper/QFileIconProvider/ItemEditorFactory: cleanup

Cleanup QDataWidgetMapper/QFileIconProvider/ItemEditorFactory autotests:
 - use range-based for loops
 - use nullptr
 - use member initialization
 - use new signal/slot syntax
 - use static invocations
 - use override

Change-Id: I1a36ea2da7de1cfa5d5d4e305ef508fda3a6c460
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

tests/auto/widgets/itemviews/qdatawidgetmapper/tst_qdatawidgetmapper.cpp

@@ -25,15 +25,16 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-#include <QDataWidgetMapper>
-#include <QStandardItemModel>
-#include <QLineEdit>
+
 #include <QComboBox>
+#include <QDataWidgetMapper>
+#include <QLineEdit>
+#include <QMetaType>
+#include <QStandardItemModel>
+#include <QSignalSpy>
+#include <QTest>
 #include <QTextEdit>
 #include <QVBoxLayout>
-#include <QTest>
-#include <QSignalSpy>
-#include <QMetaType>
 
 class tst_QDataWidgetMapper: public QObject
 {
@@ -56,7 +57,7 @@ private slots:
 
 Q_DECLARE_METATYPE(QAbstractItemDelegate::EndEditHint)
 
-static QStandardItemModel *testModel(QObject *parent = 0)
+static QStandardItemModel *testModel(QObject *parent)
 {
     QStandardItemModel *model = new QStandardItemModel(10, 10, parent);
 
@@ -84,7 +85,7 @@ void tst_QDataWidgetMapper::setModel()
     { // let the model go out of scope firstma
         QStandardItemModel model;
         mapper.setModel(&model);
-        QCOMPARE(mapper.model(), static_cast<QAbstractItemModel *>(&model));
+        QCOMPARE(mapper.model(), &model);
     }
 
     QCOMPARE(mapper.model(), nullptr);
@@ -273,7 +274,7 @@ void tst_QDataWidgetMapper::currentIndexChanged()
     QAbstractItemModel *model = testModel(&mapper);
     mapper.setModel(model);
 
-    QSignalSpy spy(&mapper, SIGNAL(currentIndexChanged(int)));
+    QSignalSpy spy(&mapper, &QDataWidgetMapper::currentIndexChanged);
 
     mapper.toFirst();
     QCOMPARE(spy.count(), 1);
@@ -405,13 +406,13 @@ void tst_QDataWidgetMapper::mappedWidgetAt()
     mapper.addMapping(&lineEdit1, 1);
     mapper.addMapping(&lineEdit2, 2);
 
-    QCOMPARE(mapper.mappedWidgetAt(1), static_cast<QWidget *>(&lineEdit1));
-    QCOMPARE(mapper.mappedWidgetAt(2), static_cast<QWidget *>(&lineEdit2));
+    QCOMPARE(mapper.mappedWidgetAt(1), &lineEdit1);
+    QCOMPARE(mapper.mappedWidgetAt(2), &lineEdit2);
 
     mapper.addMapping(&lineEdit2, 4242);
 
     QCOMPARE(mapper.mappedWidgetAt(2), nullptr);
-    QCOMPARE(mapper.mappedWidgetAt(4242), static_cast<QWidget *>(&lineEdit2));
+    QCOMPARE(mapper.mappedWidgetAt(4242), &lineEdit2);
 }
 
 void tst_QDataWidgetMapper::textEditDoesntChangeFocusOnTab_qtbug3305()
@@ -423,7 +424,8 @@ void tst_QDataWidgetMapper::textEditDoesntChangeFocusOnTab_qtbug3305()
     QAbstractItemModel *model = testModel(&mapper);
     mapper.setModel(model);
 
-    QSignalSpy closeEditorSpy(mapper.itemDelegate(), SIGNAL(closeEditor(QWidget*,QAbstractItemDelegate::EndEditHint)));
+    QSignalSpy closeEditorSpy(mapper.itemDelegate(),
+                              &QAbstractItemDelegate::closeEditor);
     QVERIFY(closeEditorSpy.isValid());
 
     QWidget container;

tests/auto/widgets/itemviews/qfileiconprovider/tst_qfileiconprovider.cpp

@@ -27,16 +27,15 @@
 ****************************************************************************/
 
 
-#include <QtTest/QtTest>
-#include <qfileiconprovider.h>
-#include <qfileinfo.h>
+#include <QFileIconProvider>
+#include <QFileInfo>
+#include <QTest>
 
 class tst_QFileIconProvider : public QObject
 {
     Q_OBJECT
 
 private slots:
-    void qfileiconprovider_data();
     void qfileiconprovider();
 
     void iconType_data();
@@ -51,21 +50,10 @@ private slots:
     void taskQTBUG_46755_QFileIconEngine_crash();
 };
 
-// Subclass that exposes the protected functions.
-class SubQFileIconProvider : public QFileIconProvider
-{
-public:
-
-};
-
-void tst_QFileIconProvider::qfileiconprovider_data()
-{
-}
-
 void tst_QFileIconProvider::qfileiconprovider()
 {
     // don't crash
-    SubQFileIconProvider provider;
+    QFileIconProvider provider;
 }
 
 Q_DECLARE_METATYPE(QFileIconProvider::IconType)
@@ -86,7 +74,7 @@ void tst_QFileIconProvider::iconType_data()
 void tst_QFileIconProvider::iconType()
 {
     QFETCH(QFileIconProvider::IconType, type);
-    SubQFileIconProvider provider;
+    QFileIconProvider provider;
     QVERIFY(!provider.icon(type).isNull());
 }
 
@@ -109,7 +97,7 @@ void tst_QFileIconProvider::iconInfo()
 
     if (setPath)
         QVERIFY(info.exists());
-    SubQFileIconProvider provider;
+    QFileIconProvider provider;
     // we should always get an icon
     QVERIFY(!provider.icon(info).isNull());
 }
@@ -131,7 +119,7 @@ void tst_QFileIconProvider::type_data()
 void tst_QFileIconProvider::type()
 {
     QFETCH(QFileInfo, info);
-    SubQFileIconProvider provider;
+    QFileIconProvider provider;
     QVERIFY(!provider.type(info).isEmpty());
 }
 
@@ -144,7 +132,8 @@ static QIcon getIcon()
 void tst_QFileIconProvider::taskQTBUG_46755_QFileIconEngine_crash()
 {
     const QIcon &icon = getIcon();
-    foreach (const QSize &size, icon.availableSizes())
+    const auto sizes = icon.availableSizes();
+    for (const QSize &size : sizes)
         icon.pixmap(size);
 
     // No crash, all good.

tests/auto/widgets/itemviews/qitemeditorfactory/tst_qitemeditorfactory.cpp

@@ -25,9 +25,11 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-#include <QtGui/QtGui>
-#include <QtWidgets/QtWidgets>
-#include <QtTest/QtTest>
+
+
+#include <QDoubleSpinBox>
+#include <QItemEditorFactory>
+#include <QTest>
 
 class tst_QItemEditorFactory: public QObject
 {