1 files changed, 110 insertions, 0 deletions
diff --git a/tests/manual/qscreen_xrandr/tst_qscreen_xrandr.cpp b/tests/manual/qscreen_xrandr/tst_qscreen_xrandr.cpp
new file mode 100644
index 0000000000..f7611fc95a
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+++ b/tests/manual/qscreen_xrandr/tst_qscreen_xrandr.cpp
@@ -0,0 +1,110 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 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 <qpainter.h>
+#include <qrasterwindow.h>
+#include <qscreen.h>
+#include <qpa/qwindowsysteminterface.h>
+#include <QProcess>
+
+#include <QtTest/QtTest>
+
+class tst_QScreen_Xrandr: public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void xrandr_15();
+};
+
+// this test requires an X11 desktop with at least two screens
+void tst_QScreen_Xrandr::xrandr_15()
+{
+    QStringList originalScreenNames;
+    QStringList mergedScreenNames;
+    {
+        QList<QScreen *> screens = QGuiApplication::screens();
+        QVERIFY(screens.size() >= 2);
+        qDebug() << "initial set of screens:" << screens.size();
+        for (QScreen *s : screens) {
+            qDebug() << "screen: " << s->name();
+            originalScreenNames << s->name();
+            if (mergedScreenNames.size() < 2)
+                mergedScreenNames << s->name();
+        }
+    }
+
+    QSignalSpy addedSpy(qApp, &QGuiApplication::screenAdded);
+    QSignalSpy removedSpy(qApp, &QGuiApplication::screenRemoved);
+
+    // combine the first two screens into one monitor
+    // e.g. "xrandr --setmonitor Qt-merged auto eDP,HDMI-0"
+    QString prog1 = "xrandr";
+    QStringList args1;
+    args1 << "--setmonitor" << "Qt-merged" << "auto" << mergedScreenNames.join(',');
+    qDebug() << prog1 << args1;
+    QProcess *myProcess1 = new QProcess(this);
+    myProcess1->start(prog1, args1);
+    QVERIFY(myProcess1->waitForFinished());
+
+    QTRY_COMPARE(removedSpy.count(), 2);
+    QVERIFY(QGuiApplication::screens().size() != originalScreenNames.size());
+    auto combinedScreens = QGuiApplication::screens();
+    qDebug() << "added" << addedSpy.count() << "removed" << removedSpy.count() << "combined screen(s):" << combinedScreens.size();
+    QScreen *merged = nullptr;
+    for (QScreen *s : combinedScreens) {
+        qDebug() << "screen: " << s->name();
+        if (s->name() == QLatin1String("Qt-merged"))
+            merged = s;
+    }
+    // the screen that we created must be in the list now
+    QVERIFY(merged);
+    QCOMPARE(QGuiApplication::screens().size(), originalScreenNames.size() - 1);
+    addedSpy.clear();
+    removedSpy.clear();
+
+    // "xrandr --delmonitor Qt-merged"
+    QString prog2 = "xrandr";
+    QStringList args2;
+    args2 << "--delmonitor" << "Qt-merged";
+    QProcess *myProcess2 = new QProcess(this);
+    myProcess2->start(prog2, args2);
+    QVERIFY(myProcess2->waitForFinished());
+
+    QTRY_COMPARE(removedSpy.count(), 1);
+    QVERIFY(QGuiApplication::screens().size() != combinedScreens.size());
+    auto separatedScreens = QGuiApplication::screens();
+    qDebug() << "added" << addedSpy.count() << "removed" << removedSpy.count() << "separated screen(s):" << separatedScreens.size();
+    for (QScreen *s : separatedScreens)
+        qDebug() << "screen: " << s->name();
+
+    QCOMPARE(QGuiApplication::screens().size(), originalScreenNames.size());
+}
+
+#include <tst_qscreen_xrandr.moc>
+QTEST_MAIN(tst_QScreen_Xrandr);