init

tests/auto/gui/kernel/qbackingstore/qbackingstore.pro

@@ -0,0 +1,6 @@
+CONFIG += testcase
+TARGET = tst_qbackingstore
+
+QT += core-private gui-private testlib
+
+SOURCES  += tst_qbackingstore.cpp

tests/auto/gui/kernel/qbackingstore/tst_qbackingstore.cpp

@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qwindow.h>
+#include <qbackingstore.h>
+#include <qpainter.h>
+
+#include <QtTest/QtTest>
+
+#include <QEvent>
+
+// For QSignalSpy slot connections.
+Q_DECLARE_METATYPE(Qt::ScreenOrientation)
+
+class tst_QBackingStore : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void flush();
+};
+
+class Window : public QWindow
+{
+public:
+    Window()
+        : backingStore(this)
+    {
+    }
+
+    void resizeEvent(QResizeEvent *)
+    {
+        backingStore.resize(size());
+    }
+
+    void exposeEvent(QExposeEvent *event)
+    {
+        QRect rect(QPoint(), size());
+
+        backingStore.beginPaint(rect);
+
+        QPainter p(backingStore.paintDevice());
+        p.fillRect(rect, Qt::white);
+        p.end();
+
+        backingStore.endPaint();
+
+        backingStore.flush(event->region().boundingRect());
+    }
+
+private:
+    QBackingStore backingStore;
+};
+
+void tst_QBackingStore::flush()
+{
+    Window window;
+    window.setGeometry(20, 20, 200, 200);
+    window.showMaximized();
+
+    QTRY_VERIFY(window.isExposed());
+}
+
+#include <tst_qbackingstore.moc>
+QTEST_MAIN(tst_QBackingStore);