commit dbea11feacc3a977878eb4fe54c3fcf84907870b
Author: Jan-Arve Sæther <jan-arve.saether@nokia.com>
Date:   Tue Feb 23 13:20:11 2010 +0100

    Add autotest for  QTBUG-5448

diff --git a/tests/auto/qwidget/tst_qwidget.cpp b/tests/auto/qwidget/tst_qwidget.cpp
index 3e14b56..ce55e7e 100644
--- a/tests/auto/qwidget/tst_qwidget.cpp
+++ b/tests/auto/qwidget/tst_qwidget.cpp
@@ -392,6 +392,7 @@ private slots:
 
     void focusProxyAndInputMethods();
     void scrollWithoutBackingStore();
+    void updateGeometryShouldInvalidateAllAncestors();
 
 private:
     bool ensureScreenSize(int width, int height);
@@ -9757,5 +9758,23 @@ void tst_QWidget::scrollWithoutBackingStore()
     QCOMPARE(child.pos(),QPoint(25,25));
 }
 
+void tst_QWidget::updateGeometryShouldInvalidateAllAncestors()
+{
+    QWidget window;
+    QVBoxLayout *l1 = new QVBoxLayout(&window);
+    l1->setMargin(0);
+    QVBoxLayout *l2 = new QVBoxLayout;
+    l1->addLayout(l2);
+    QLabel *label = new QLabel(&window);
+    l2->addWidget(label);
+    window.show();
+    QTest::qWaitForWindowShown(&window);
+    qApp->sendPostedEvents();
+    QCOMPARE(l1->sizeHint(), label->sizeHint());
+
+    label->setText(QLatin1String("should trigger updateGeometry"));
+    QCOMPARE(l1->sizeHint(), label->sizeHint());
+}
+
 QTEST_MAIN(tst_QWidget)
 #include "tst_qwidget.moc"