qt 6.5.1 original

tests/auto/gui/kernel/qrasterwindow/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_qrasterwindow Test:
+#####################################################################
+
+qt_internal_add_test(tst_qrasterwindow
+    SOURCES
+        tst_qrasterwindow.cpp
+    LIBRARIES
+        Qt::CorePrivate
+        Qt::Gui
+        Qt::GuiPrivate
+)

tests/auto/gui/kernel/qrasterwindow/tst_qrasterwindow.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QtGui/QRasterWindow>
+#include <QTest>
+#include <QtGui/QPainter>
+
+class tst_QRasterWindow : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void create();
+    void basic();
+};
+
+void tst_QRasterWindow::create()
+{
+    QRasterWindow w;
+
+    w.resize(640, 480);
+    w.show();
+
+    QVERIFY(QTest::qWaitForWindowExposed(&w));
+}
+
+class PainterWindow : public QRasterWindow
+{
+public:
+    void reset() { paintCount = 0; }
+
+    void paintEvent(QPaintEvent*) override {
+        ++paintCount;
+        QPainter p(this);
+        p.fillRect(QRect(0, 0, 100, 100), Qt::blue);
+        p.end();
+    }
+
+    int paintCount;
+};
+
+void tst_QRasterWindow::basic()
+{
+    PainterWindow w;
+    w.reset();
+    w.resize(400, 400);
+    w.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&w));;
+
+    QVERIFY(w.paintCount >= 1);
+
+    w.reset();
+    w.update();
+    QTRY_VERIFY(w.paintCount >= 1);
+}
+
+#include <tst_qrasterwindow.moc>
+
+QTEST_MAIN(tst_QRasterWindow)