Enable checking for whether the system palette was explicitly set

In order to obey a palette set globally on QApplication, an application
attribute for checking if it's set at all is added.

Task-number: QTBUG-39800
Change-Id: I26b965e6e18e0e1ca4df03cf343b3527df3636b2
Reviewed-by: J-P Nurmi <jpnurmi@theqtcompany.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/auto/gui/kernel/qguiapplication/tst_qguiapplication.cpp b/tests/auto/gui/kernel/qguiapplication/tst_qguiapplication.cpp
index b921e1519f..19365bffdd 100644
--- a/tests/auto/gui/kernel/qguiapplication/tst_qguiapplication.cpp
+++ b/tests/auto/gui/kernel/qguiapplication/tst_qguiapplication.cpp
@@ -76,6 +76,7 @@ private slots:
     void genericPluginsAndWindowSystemEvents();
     void layoutDirection();
     void globalShareContext();
+    void testSetPaletteAttribute();
 
     void staticFunctions();
 
@@ -968,6 +969,22 @@ void tst_QGuiApplication::globalShareContext()
 #endif
 }
 
+void tst_QGuiApplication::testSetPaletteAttribute()
+{
+    QCoreApplication::setAttribute(Qt::AA_SetPalette, false);
+    int argc = 1;
+    char *argv[] = { const_cast<char*>("tst_qguiapplication") };
+
+    QGuiApplication app(argc, argv);
+
+    QVERIFY(!QCoreApplication::testAttribute(Qt::AA_SetPalette));
+    QPalette palette;
+    palette.setColor(QPalette::Foreground, Qt::red);
+    QGuiApplication::setPalette(palette);
+
+    QVERIFY(QCoreApplication::testAttribute(Qt::AA_SetPalette));
+}
+
 // Test that static functions do not crash if there is no application instance.
 void tst_QGuiApplication::staticFunctions()
 {