Fix access incorrect index in QListView with batch layout

The size of flowPositions is larger by one than the number
of rows in the model so the last correct row number is
flowPositions.count()-2, not flowPositions.count()-1.

Change-Id: Idf8bbd155151d553947d5d299dd01ffaff0c95fa
Task-number: QTBUG-47694
Reviewed-by: Alexander Volkov <a.volkov@rusbitech.ru>
Reviewed-by: David Faure <david.faure@kdab.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp b/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
index 0f1c5723d5..6eed21abb2 100644
--- a/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
+++ b/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
@@ -150,6 +150,7 @@ private slots:
     void horizontalScrollingByVerticalWheelEvents();
     void taskQTBUG_7232_AllowUserToControlSingleStep();
     void taskQTBUG_51086_skippingIndexesInSelectedIndexes();
+    void taskQTBUG_47694_indexOutOfBoundBatchLayout();
 };
 
 // Testing get/set functions
@@ -2486,5 +2487,18 @@ void tst_QListView::taskQTBUG_51086_skippingIndexesInSelectedIndexes()
     QVERIFY(!indexes.contains(data.index(8, 0)));
 }
 
+void tst_QListView::taskQTBUG_47694_indexOutOfBoundBatchLayout()
+{
+    QListView view;
+    view.setLayoutMode(QListView::Batched);
+    int batchSize = view.batchSize();
+
+    QStandardItemModel model(batchSize + 1, 1);
+
+    view.setModel(&model);
+
+    view.scrollTo(model.index(batchSize - 1, 0));
+}
+
 QTEST_MAIN(tst_QListView)
 #include "tst_qlistview.moc"