tests/xcb: add a test for screen off and on

Task-number: QTBUG-96247
Change-Id: I1fd6f21ad914480b7e8d07227ee80184e305276a
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/manual/qscreen_xrandr/tst_qscreen_xrandr.cpp b/tests/manual/qscreen_xrandr/tst_qscreen_xrandr.cpp
index 9eeba585c9..166b11e2f6 100644
--- a/tests/manual/qscreen_xrandr/tst_qscreen_xrandr.cpp
+++ b/tests/manual/qscreen_xrandr/tst_qscreen_xrandr.cpp
@@ -41,6 +41,7 @@ class tst_QScreen_Xrandr: public QObject
 private slots:
     void xrandr_15_merge_and_unmerge();
     void xrandr_15_scale();
+    void xrandr_15_off_and_on();
 
 private:
     void xrandr_process(const QStringList &arguments = {});
@@ -163,6 +164,41 @@ void tst_QScreen_Xrandr::xrandr_15_scale()
     QVERIFY(width3 == width1);
 }
 
+void tst_QScreen_Xrandr::xrandr_15_off_and_on()
+{
+    QList<QScreen *> screens = QGuiApplication::screens();
+    int ss = screens.size();
+    if (ss < 1)
+        QSKIP("This test requires at least one screen.");
+
+    QStringList names;
+    for (QScreen *s : screens)
+        names << s->name();
+
+    QStringList args;
+    for (int i = ss; i > 0; i--) {
+        QString name = names.at(i-1);
+        qDebug() << "i=" << i << ", name:" << name;
+        args.clear();
+        args << "--output" << name << "--off";
+        xrandr_process(args);
+        QTest::qWait(500);
+
+        QVERIFY(QGuiApplication::screens().size() == (i != 1 ? i - 1 : i));
+    }
+
+    for (int i = ss; i > 0; i--) {
+        QString name = names.at(i-1);
+        qDebug() << "i=" << i << ", name:" << name;
+        args.clear();
+        args << "--output" << name << "--auto";
+        xrandr_process(args);
+        QTest::qWait(500);
+
+        QVERIFY(QGuiApplication::screens().size() == (i == ss ? 1 : ss - i + 1));
+    }
+}
+
 void tst_QScreen_Xrandr::xrandr_process(const QStringList &args)
 {
     QString prog = "xrandr";