QX11Info: add nextStartupId/setNextStartupId - for startup-notification

This controls what the next window to be shown will send as startup-notification
message.
http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt

Change-Id: Ia1b5e6ba004d61ca6fdfd6683d2e22dfcd0c42fb
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Richard J. Moore <rich@kde.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/auto/qx11info/tst_qx11info.cpp b/tests/auto/qx11info/tst_qx11info.cpp
index 602de1d..8334690 100644
--- a/tests/auto/qx11info/tst_qx11info.cpp
+++ b/tests/auto/qx11info/tst_qx11info.cpp
@@ -52,6 +52,7 @@ class tst_QX11Info : public QObject
 
 private slots:
     void staticFunctionsBeforeQApplication();
+    void startupId();
     void isPlatformX11();
     void appTime();
 };
@@ -110,6 +111,34 @@ void tst_QX11Info::staticFunctionsBeforeQApplication()
     QCOMPARE(appTime, 0ul);
 }
 
+static const char idFromEnv[] = "startupid_TIME123456";
+void initialize()
+{
+    qputenv("DESKTOP_STARTUP_ID", idFromEnv);
+}
+Q_CONSTRUCTOR_FUNCTION(initialize)
+
+void tst_QX11Info::startupId()
+{
+    int argc = 0;
+    QApplication app(argc, 0);
+
+    // This relies on the fact that no widget was shown yet,
+    // so please make sure this method is always the first test.
+    QCOMPARE(QString(QX11Info::nextStartupId()), QString(idFromEnv));
+    QWidget w;
+    w.show();
+    QVERIFY(QX11Info::nextStartupId().isEmpty());
+
+    QByteArray idSecondWindow = "startupid2_TIME234567";
+    QX11Info::setNextStartupId(idSecondWindow);
+    QCOMPARE(QX11Info::nextStartupId(), idSecondWindow);
+
+    QWidget w2;
+    w2.show();
+    QVERIFY(QX11Info::nextStartupId().isEmpty());
+}
+
 void tst_QX11Info::isPlatformX11()
 {
     int argc = 0;