Fix warnings about not being able to set Window geometry on Windows.

Fully decorated windows cannot be smaller than 160x30 (Large fonts).
Enlarge Windows or remove Window frame  to get rid of decorations.

Task-number: QTBUG-28611
Change-Id: Idb6ee94fb8d0760d5f97042b3084557f11e9fdf9
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

17 files changed, 171 insertions, 5 deletions

diff --git a/tests/auto/widgets/dialogs/qdialog/tst_qdialog.cpp b/tests/auto/widgets/dialogs/qdialog/tst_qdialog.cpp
index 09fdd31495..ac460b1c7c 100644
--- a/tests/auto/widgets/dialogs/qdialog/tst_qdialog.cpp
+++ b/tests/auto/widgets/dialogs/qdialog/tst_qdialog.cpp
@@ -172,10 +172,10 @@ void tst_QDialog::showExtension_data()
     QTest::addColumn<QSize>("result");
 
     //next we fill it with data
-    QTest::newRow( "data0" )  << QSize(100,100) << QSize(50,50) << false << QSize(100,150);
-    QTest::newRow( "data1" )  << QSize(100,100) << QSize(120,50) << false << QSize(120,150);
-    QTest::newRow( "data2" )  << QSize(100,100) << QSize(50,50) << true << QSize(150,100);
-    QTest::newRow( "data3" )  << QSize(100,100) << QSize(50,120) << true << QSize(150,120);
+    QTest::newRow( "data0" )  << QSize(200,100) << QSize(50,50) << false << QSize(200,150);
+    QTest::newRow( "data1" )  << QSize(200,100) << QSize(220,50) << false << QSize(220,150);
+    QTest::newRow( "data2" )  << QSize(200,100) << QSize(50,50) << true << QSize(250,100);
+    QTest::newRow( "data3" )  << QSize(200,100) << QSize(50,120) << true << QSize(250,120);
 }
 
 void tst_QDialog::showExtension()
diff --git a/tests/auto/widgets/graphicsview/qgraphicsitem/tst_qgraphicsitem.cpp b/tests/auto/widgets/graphicsview/qgraphicsitem/tst_qgraphicsitem.cpp
index 670369a584..b1411ea618 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsitem/tst_qgraphicsitem.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsitem/tst_qgraphicsitem.cpp
@@ -7889,6 +7889,7 @@ void tst_QGraphicsItem::itemUsesExtendedStyleOption()
     scene.addItem(rect);
     rect->setPos(200, 200);
     QWidget topLevel;
+    topLevel.resize(200, 200);
     QGraphicsView view(&scene, &topLevel);
     topLevel.setWindowFlags(Qt::X11BypassWindowManagerHint);
     rect->startTrack = false;
diff --git a/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp b/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp
index 7e7ec4f313..4ef41f4fca 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp
@@ -133,6 +133,14 @@ class FriendlyGraphicsScene : public QGraphicsScene
 };
 #endif
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QGraphicsView : public QObject
 {
     Q_OBJECT
@@ -366,6 +374,7 @@ void tst_QGraphicsView::alignment()
     scene.addRect(QRectF(-10, -10, 20, 20));
 
     QGraphicsView view(&scene);
+    setFrameless(&view);
     view.show();
     QVERIFY(QTest::qWaitForWindowExposed(&view));
 
@@ -649,6 +658,7 @@ void tst_QGraphicsView::dragMode_scrollHand()
 {
     for (int j = 0; j < 2; ++j) {
         QGraphicsView view;
+        setFrameless(&view);
         QCOMPARE(view.dragMode(), QGraphicsView::NoDrag);
 
         view.setSceneRect(-1000, -1000, 2000, 2000);
@@ -875,6 +885,7 @@ void tst_QGraphicsView::dragMode_rubberBand()
 void tst_QGraphicsView::rubberBandSelectionMode()
 {
     QWidget toplevel;
+    setFrameless(&toplevel);
 
     QGraphicsScene scene;
     QGraphicsRectItem *rect = scene.addRect(QRectF(10, 10, 80, 80));
@@ -1094,6 +1105,7 @@ void tst_QGraphicsView::matrix_combine()
 void tst_QGraphicsView::centerOnPoint()
 {
     QWidget toplevel;
+    setFrameless(&toplevel);
 
     QGraphicsScene scene;
     scene.addEllipse(QRectF(-100, -100, 50, 50));
@@ -1757,6 +1769,7 @@ void tst_QGraphicsView::mapToScenePoint()
 {
     QGraphicsScene scene;
     QGraphicsView view(&scene);
+    setFrameless(&view);
     view.rotate(90);
     view.setFixedSize(117, 117);
     view.show();
@@ -1816,6 +1829,7 @@ void tst_QGraphicsView::mapToScenePoly()
 {
     QGraphicsScene scene;
     QGraphicsView view(&scene);
+    setFrameless(&view);
     view.translate(100, 100);
     view.setFixedSize(117, 117);
     view.show();
@@ -2197,6 +2211,7 @@ void tst_QGraphicsView::transformationAnchor()
     scene.addRect(QRectF(-50, -50, 100, 100), QPen(Qt::black), QBrush(Qt::blue));
 
     QGraphicsView view(&scene);
+    setFrameless(&view);
 
     for (int i = 0; i < 2; ++i) {
         view.resize(100, 100);
@@ -2235,6 +2250,7 @@ void tst_QGraphicsView::resizeAnchor()
     scene.addRect(QRectF(-50, -50, 100, 100), QPen(Qt::black), QBrush(Qt::blue));
 
     QGraphicsView view(&scene);
+    setFrameless(&view);
 
     for (int i = 0; i < 2; ++i) {
         view.resize(100, 100);
@@ -3175,6 +3191,7 @@ void tst_QGraphicsView::task239047_fitInViewSmallViewport()
     // Ensure that with a small viewport, fitInView doesn't mirror the
     // scene.
     QWidget widget;
+    setFrameless(&widget);
     QGraphicsScene scene;
     QGraphicsView *view = new QGraphicsView(&scene, &widget);
     view->resize(3, 3);
@@ -4434,6 +4451,7 @@ void tst_QGraphicsView::QTBUG_4151_clipAndIgnore()
     scene.addItem(ignore);
 
     QGraphicsView view(&scene);
+    setFrameless(&view);
     view.setFrameStyle(0);
     view.resize(75, 75);
     view.show();
@@ -4592,6 +4610,7 @@ void tst_QGraphicsView::QTBUG_16063_microFocusRect()
     scene.addItem(item);
 
     QGraphicsView view(&scene);
+    setFrameless(&view);
 
     view.setFixedSize(40, 40);
     view.show();
diff --git a/tests/auto/widgets/itemviews/qabstractitemview/tst_qabstractitemview.cpp b/tests/auto/widgets/itemviews/qabstractitemview/tst_qabstractitemview.cpp
index 38fd50bbf8..30eecb58ed 100644
--- a/tests/auto/widgets/itemviews/qabstractitemview/tst_qabstractitemview.cpp
+++ b/tests/auto/widgets/itemviews/qabstractitemview/tst_qabstractitemview.cpp
@@ -70,6 +70,14 @@
         QCOMPARE(expr, expected); \
     } while(0)
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class TestView : public QAbstractItemView
 {
     Q_OBJECT
@@ -621,6 +629,7 @@ void tst_QAbstractItemView::noModel()
 
     QStandardItemModel model(20,20);
     QTreeView view;
+    setFrameless(&view);
 
     view.setModel(&model);
     // Make the viewport smaller than the contents, so that we can scroll
diff --git a/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp b/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
index 2f7b72fefa..f26940aeb1 100644
--- a/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
+++ b/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
@@ -70,6 +70,16 @@ static inline HWND getHWNDForWidget(const QWidget *widget)
 }
 #endif // Q_OS_WIN
 
+// Make a widget frameless to prevent size constraints of title bars
+// from interfering (Windows).
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QListView : public QObject
 {
     Q_OBJECT
@@ -1178,6 +1188,7 @@ void tst_QListView::selection()
 void tst_QListView::scrollTo()
 {
     QWidget topLevel;
+    setFrameless(&topLevel);
     QListView lv(&topLevel);
     QStringListModel model(&lv);
     QStringList list;
@@ -1842,6 +1853,7 @@ void tst_QListView::taskQTBUG_2233_scrollHiddenItems()
     const int rowCount = 200;
 
     QWidget topLevel;
+    setFrameless(&topLevel);
     QListView view(&topLevel);
     QStringListModel model(&view);
     QStringList list;
@@ -1993,6 +2005,7 @@ void tst_QListView::taskQTBUG_9455_wrongScrollbarRanges()
 
     QStringListModel model(list);
     ListView_9455 w;
+    setFrameless(&w);
     w.setModel(&model);
     w.setViewMode(QListView::IconMode);
     w.resize(116, 132);
diff --git a/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp b/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
index 74511fc87d..51bd09940c 100644
--- a/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
+++ b/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
@@ -57,6 +57,16 @@ typedef QList<int> IntList;
 
 typedef QList<bool> BoolList;
 
+// Make a widget frameless to prevent size constraints of title bars
+// from interfering (Windows).
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QTableView : public QObject
 {
     Q_OBJECT
@@ -2147,6 +2157,7 @@ void tst_QTableView::rowViewportPosition()
 
     QtTestTableModel model(rowCount, 1);
     QtTestTableView view;
+    setFrameless(&view);
     view.resize(100, 2 * rowHeight);
     view.show();
 
@@ -2309,6 +2320,7 @@ void tst_QTableView::columnViewportPosition()
 
     QtTestTableModel model(1, columnCount);
     QtTestTableView view;
+    setFrameless(&view);
     view.resize(2 * columnWidth, 100);
     view.show();
 
@@ -2586,6 +2598,7 @@ void tst_QTableView::scrollTo()
 
     QtTestTableModel model(rowCount, columnCount);
     QWidget toplevel;
+    setFrameless(&toplevel);
     QtTestTableView view(&toplevel);
 
     toplevel.show();
@@ -3343,6 +3356,7 @@ void tst_QTableView::tabFocus()
     // to change focus on an empty table view, or on a table view that doesn't
     // have this property set.
     QWidget window;
+    window.resize(200, 200);
 
     QTableView *view = new QTableView(&window);
     QLineEdit *edit = new QLineEdit(&window);
diff --git a/tests/auto/widgets/itemviews/qtreeview/tst_qtreeview.cpp b/tests/auto/widgets/itemviews/qtreeview/tst_qtreeview.cpp
index c4c8c348ff..cb7ca8f5c1 100644
--- a/tests/auto/widgets/itemviews/qtreeview/tst_qtreeview.cpp
+++ b/tests/auto/widgets/itemviews/qtreeview/tst_qtreeview.cpp
@@ -111,6 +111,16 @@ struct PublicView : public QTreeView
     QAbstractItemViewPrivate* aiv_priv() { return static_cast<QAbstractItemViewPrivate*>(d_ptr.data()); }
 };
 
+// Make a widget frameless to prevent size constraints of title bars
+// from interfering (Windows).
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QTreeView : public QObject
 {
     Q_OBJECT
@@ -877,6 +887,7 @@ void tst_QTreeView::horizontalScrollMode()
     }
 
     QTreeView view;
+    setFrameless(&view);
     view.setModel(&model);
     view.setFixedSize(100, 100);
     view.header()->resizeSection(0, 200);
@@ -3417,6 +3428,7 @@ void tst_QTreeView::task224091_appendColumns()
 {
     QStandardItemModel *model = new QStandardItemModel();
     QWidget* topLevel= new QWidget;
+    setFrameless(topLevel);
     QTreeView *treeView = new QTreeView(topLevel);
     treeView->setModel(model);
     topLevel->show();
diff --git a/tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp b/tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp
index bd72e643ed..9a41eeab5a 100644
--- a/tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp
+++ b/tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp
@@ -1945,6 +1945,7 @@ void tst_QApplication::touchEventPropagation()
     {
         // touch event behavior on a window
         TouchEventPropagationTestWidget window;
+        window.resize(200, 200);
         window.setObjectName("1. window");
         window.show(); // Must have an explicitly specified QWindow for handleTouchEvent,
                        // passing 0 would result in using topLevelAt() which is not ok in this case
@@ -1999,6 +2000,7 @@ void tst_QApplication::touchEventPropagation()
     {
         // touch event behavior on a window with a child widget
         TouchEventPropagationTestWidget window;
+        window.resize(200, 200);
         window.setObjectName("2. window");
         TouchEventPropagationTestWidget widget(&window);
         widget.setObjectName("2. widget");
diff --git a/tests/auto/widgets/kernel/qboxlayout/tst_qboxlayout.cpp b/tests/auto/widgets/kernel/qboxlayout/tst_qboxlayout.cpp
index 4f1615a48e..f1e2c94966 100644
--- a/tests/auto/widgets/kernel/qboxlayout/tst_qboxlayout.cpp
+++ b/tests/auto/widgets/kernel/qboxlayout/tst_qboxlayout.cpp
@@ -44,6 +44,14 @@
 #include <QtGui>
 #include <QtWidgets>
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QBoxLayout : public QObject
 {
     Q_OBJECT
@@ -198,6 +206,7 @@ void tst_QBoxLayout::sizeConstraints()
 void tst_QBoxLayout::setGeometry()
 {
     QWidget toplevel;
+    setFrameless(&toplevel);
     QWidget w(&toplevel);
     QVBoxLayout *lay = new QVBoxLayout;
     lay->setMargin(0);
diff --git a/tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp b/tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp
index b2cdb87221..64c549c3c2 100644
--- a/tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp
+++ b/tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp
@@ -55,6 +55,14 @@
 
 #include <qformlayout.h>
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QFormLayout : public QObject
 {
     Q_OBJECT
@@ -345,6 +353,7 @@ void tst_QFormLayout::spacing()
 void tst_QFormLayout::contentsRect()
 {
     QWidget w;
+    setFrameless(&w);
     QFormLayout form;
     w.setLayout(&form);
     form.addRow("Label", new QPushButton(&w));
diff --git a/tests/auto/widgets/kernel/qlayout/tst_qlayout.cpp b/tests/auto/widgets/kernel/qlayout/tst_qlayout.cpp
index 6b01212e1d..827821b55a 100644
--- a/tests/auto/widgets/kernel/qlayout/tst_qlayout.cpp
+++ b/tests/auto/widgets/kernel/qlayout/tst_qlayout.cpp
@@ -57,6 +57,14 @@
 #include <QRadioButton>
 #include <private/qlayoutengine_p.h>
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QLayout : public QObject
 {
 Q_OBJECT
@@ -126,6 +134,7 @@ void tst_QLayout::geometry()
     // should be the same.
     QApplication::setStyle(QStyleFactory::create(QLatin1String("Windows")));
     QWidget topLevel;
+    setFrameless(&topLevel);
     QWidget w(&topLevel);
     QVBoxLayout layout(&w);
     SizeHinterFrame widget(QSize(100,100));
diff --git a/tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp b/tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp
index d65a98d7ba..2b9ea6ad4f 100644
--- a/tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp
+++ b/tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp
@@ -213,7 +213,7 @@ void tst_QShortcut::initTestCase()
     mainW = new QMainWindow(0);
     mainW->setWindowFlags(Qt::X11BypassWindowManagerHint);
     edit  = new TestEdit(mainW, "test_edit");
-    mainW->setFixedSize( 100, 100 );
+    mainW->setFixedSize( 200, 200 );
     mainW->setCentralWidget( edit );
     mainW->show();
     mainW->activateWindow();
diff --git a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
index a24f69b35e..92c7eaecec 100644
--- a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
+++ b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
@@ -154,6 +154,16 @@ bool macHasAccessToWindowsServer()
 }
 #endif
 
+// Make a widget frameless to prevent size constraints of title bars
+// from interfering (Windows).
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QWidget : public QObject
 {
     Q_OBJECT
@@ -1969,6 +1979,7 @@ void tst_QWidget::showMaximized()
 
     {
         QWidget widget;
+        setFrameless(&widget);
         widget.setGeometry(0, 0, 10, 10);
         widget.showMaximized();
         QTRY_VERIFY(widget.size().width() > 20 && widget.size().height() > 20);
@@ -2080,6 +2091,7 @@ void tst_QWidget::resizeEvent()
 {
     {
         QWidget wParent;
+        wParent.resize(200, 200);
         ResizeWidget wChild(&wParent);
         wParent.show();
         QCOMPARE (wChild.m_resizeEventCount, 1); // initial resize event before paint
@@ -2095,6 +2107,7 @@ void tst_QWidget::resizeEvent()
 
     {
         ResizeWidget wTopLevel;
+        wTopLevel.resize(200, 200);
         wTopLevel.show();
         QCOMPARE (wTopLevel.m_resizeEventCount, 1); // initial resize event before paint for toplevels
         wTopLevel.hide();
@@ -2182,6 +2195,7 @@ void tst_QWidget::showMinimizedKeepsFocus()
     //testing deletion of the focusWidget
     {
         QWidget window;
+        window.resize(200, 200);
         QWidget *child = new QWidget(&window);
         child->setFocusPolicy(Qt::StrongFocus);
         window.show();
@@ -2199,6 +2213,7 @@ void tst_QWidget::showMinimizedKeepsFocus()
     //testing reparenting the focus widget
     {
         QWidget window;
+        window.resize(200, 200);
         QWidget *child = new QWidget(&window);
         child->setFocusPolicy(Qt::StrongFocus);
         window.show();
@@ -2216,6 +2231,7 @@ void tst_QWidget::showMinimizedKeepsFocus()
     //testing setEnabled(false)
     {
         QWidget window;
+        window.resize(200, 200);
         QWidget *child = new QWidget(&window);
         child->setFocusPolicy(Qt::StrongFocus);
         window.show();
@@ -2233,6 +2249,7 @@ void tst_QWidget::showMinimizedKeepsFocus()
     //testing clearFocus
     {
         QWidget window;
+        window.resize(200, 200);
         QWidget *firstchild = new QWidget(&window);
         firstchild->setFocusPolicy(Qt::StrongFocus);
         QWidget *child = new QWidget(&window);
@@ -4501,6 +4518,7 @@ void tst_QWidget::setWindowGeometry()
 void tst_QWidget::setGeometry_win()
 {
     QWidget widget;
+    setFrameless(&widget);
     widget.setGeometry(0, 600, 100,100);
     widget.show();
     widget.setWindowState(widget.windowState() | Qt::WindowMaximized);
@@ -5727,6 +5745,7 @@ void tst_QWidget::childEvents()
     {
         // no children created, not shown
         QWidget widget;
+        widget.resize(200, 200);
         EventRecorder spy;
         widget.installEventFilter(&spy);
 
@@ -5746,6 +5765,7 @@ void tst_QWidget::childEvents()
     {
         // no children, shown
         QWidget widget;
+        widget.resize(200, 200);
         EventRecorder spy;
         widget.installEventFilter(&spy);
 
@@ -5786,6 +5806,7 @@ void tst_QWidget::childEvents()
     {
         // 2 children, not shown
         QWidget widget;
+        widget.resize(200, 200);
         EventRecorder spy;
         widget.installEventFilter(&spy);
 
@@ -5821,6 +5842,7 @@ void tst_QWidget::childEvents()
     {
         // 2 children, widget shown
         QWidget widget;
+        widget.resize(200, 200);
         EventRecorder spy;
         widget.installEventFilter(&spy);
 
@@ -5877,6 +5899,7 @@ void tst_QWidget::childEvents()
     {
         // 2 children, but one is reparented away, not shown
         QWidget widget;
+        widget.resize(200, 200);
         EventRecorder spy;
         widget.installEventFilter(&spy);
 
@@ -5913,6 +5936,7 @@ void tst_QWidget::childEvents()
     {
         // 2 children, but one is reparented away, then widget is shown
         QWidget widget;
+        widget.resize(200, 200);
         EventRecorder spy;
         widget.installEventFilter(&spy);
 
@@ -7328,6 +7352,7 @@ void tst_QWidget::alienWidgets()
         QWidget *toolBar = new QWidget(&mainWindow);
         QWidget *dockWidget = new QWidget(&mainWindow);
         QWidget *centralWidget = new QWidget(&mainWindow);
+        centralWidget->setMinimumSize(QSize(200, 200));
 
         QWidget *button = new QWidget(centralWidget);
         QWidget *mdiArea = new QWidget(centralWidget);
@@ -7844,6 +7869,7 @@ void tst_QWidget::immediateRepaintAfterInvalidateBuffer()
 void tst_QWidget::effectiveWinId()
 {
     QWidget parent;
+    parent.resize(200, 200);
     QWidget child(&parent);
 
     // Shouldn't crash.
diff --git a/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp b/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
index 058831af2e..0c94e05e61 100644
--- a/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
+++ b/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
@@ -53,6 +53,13 @@
 #include <qpushbutton.h>
 #include <qboxlayout.h>
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
 
 class tst_QWidget_window : public QWidget
 {
@@ -116,6 +123,7 @@ void tst_QWidget_window::tst_min_max_size()
     const QSize minSize(300, 400);
     const QSize maxSize(1000, 500);
     QWidget w1;
+    setFrameless(&w1);
     (new QVBoxLayout(&w1))->addWidget(new QPushButton("Test"));
     if (setMinMaxSizeBeforeShow) {
         w1.setMinimumSize(minSize);
diff --git a/tests/auto/widgets/kernel/qwidgetaction/tst_qwidgetaction.cpp b/tests/auto/widgets/kernel/qwidgetaction/tst_qwidgetaction.cpp
index a6fac44c2a..68a62e6432 100644
--- a/tests/auto/widgets/kernel/qwidgetaction/tst_qwidgetaction.cpp
+++ b/tests/auto/widgets/kernel/qwidgetaction/tst_qwidgetaction.cpp
@@ -51,6 +51,14 @@
 #include <qmainwindow.h>
 #include <qmenubar.h>
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class tst_QWidgetAction : public QObject
 {
     Q_OBJECT
@@ -98,6 +106,7 @@ void tst_QWidgetAction::defaultWidget()
     }
     {
         QPointer<QComboBox> combo = new QComboBox(0);
+        setFrameless(combo.data());
         combo->show();
 
         QWidgetAction *action = new QWidgetAction(0);
@@ -110,8 +119,10 @@ void tst_QWidgetAction::defaultWidget()
     }
     {
         QToolBar tb1;
+        setFrameless(&tb1);
         tb1.show();
         QToolBar tb2;
+        setFrameless(&tb2);
         tb2.show();
 
         QPointer<QComboBox> combo = new QComboBox(0);
@@ -175,6 +186,7 @@ void tst_QWidgetAction::visibilityUpdate()
     // actually keeping the widget's state in sync with the
     // action in terms of visibility is QToolBar's responsibility.
     QToolBar tb;
+    setFrameless(&tb);
     tb.show();
 
     QComboBox *combo = new QComboBox(0);
@@ -213,8 +225,10 @@ QWidget *ComboAction::createWidget(QWidget *parent)
 void tst_QWidgetAction::customWidget()
 {
     QToolBar tb1;
+    setFrameless(&tb1);
     tb1.show();
     QToolBar tb2;
+    setFrameless(&tb2);
     tb2.show();
 
     ComboAction *action = new ComboAction(0);
@@ -273,6 +287,7 @@ void tst_QWidgetAction::visibility()
         a->setDefaultWidget(combo);
 
         QToolBar *tb = new QToolBar;
+        setFrameless(tb);
         tb->addAction(a);
         QVERIFY(!combo->isVisible());
         tb->show();
@@ -292,6 +307,7 @@ void tst_QWidgetAction::visibility()
         QVERIFY(!combo->isVisible());
 
         QToolBar *tb2 = new QToolBar;
+        setFrameless(tb2);
         tb->removeAction(a);
         tb2->addAction(a);
         QVERIFY(!combo->isVisible());
@@ -308,6 +324,7 @@ void tst_QWidgetAction::visibility()
 void tst_QWidgetAction::setEnabled()
 {
     QToolBar toolbar;
+    setFrameless(&toolbar);
     QComboBox *combobox = new QComboBox;
     QAction *action = toolbar.addWidget(combobox);
     toolbar.show();
diff --git a/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp b/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
index 2fbe2a2c16..cebc2e0cbb 100644
--- a/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
+++ b/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
@@ -49,6 +49,14 @@
 
 #include "../../../../shared/filesystem.h"
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class CsvCompleter : public QCompleter
 {
     Q_OBJECT
@@ -1282,6 +1290,7 @@ private slots:
 void tst_QCompleter::task246056_setCompletionPrefix()
 {
     task246056_ComboBox *comboBox = new task246056_ComboBox;
+    setFrameless(comboBox);
     QVERIFY(comboBox->completer());
     comboBox->addItem("");
     comboBox->addItem("a1");
diff --git a/tests/auto/widgets/widgets/qabstractslider/tst_qabstractslider.cpp b/tests/auto/widgets/widgets/qabstractslider/tst_qabstractslider.cpp
index 50d24a6b9f..63d054de77 100644
--- a/tests/auto/widgets/widgets/qabstractslider/tst_qabstractslider.cpp
+++ b/tests/auto/widgets/widgets/qabstractslider/tst_qabstractslider.cpp
@@ -52,6 +52,14 @@
 // defined to be 120 by the wheel mouse vendors according to the docs
 #define WHEEL_DELTA 120
 
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+
 class Slider : public QAbstractSlider
 {
     public:
@@ -937,6 +945,7 @@ void tst_QAbstractSlider::sliderPressedReleased()
     QFETCH(int, expectedCount);
 
     QWidget topLevel;
+    setFrameless(&topLevel);
     QAbstractSlider *slider;
     switch (control) {
     default: