Expand indicator would not be displayed after removal of a collapsed item's child

While setting the hasChildren property of QTreeViewItem, "collapsed" and
"not visible" were being mistaken.

Auto-test included.

Reviewed-by: Olivier
Task-number: QTBUG-7443
(cherry picked from commit 77670c3c0fdc3021356e212e94042a0b5a4f4f8c)

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/auto/qtreeview/tst_qtreeview.cpp b/tests/auto/qtreeview/tst_qtreeview.cpp
index fd4815e..e39cf6c 100644
--- a/tests/auto/qtreeview/tst_qtreeview.cpp
+++ b/tests/auto/qtreeview/tst_qtreeview.cpp
@@ -3083,6 +3083,20 @@ void tst_QTreeView::styleOptionViewItem()
         QApplication::processEvents();
         QTRY_VERIFY(delegate.count >= 3);
         QApplication::processEvents();
+
+        item00->setText("OnlyOne");
+        item0->insertRow(2, new QStandardItem("OnlyOne Last"));
+        view.collapse(item0->index());
+        item0->removeRow(0);
+        delegate.count = 0;
+        QTRY_VERIFY(delegate.count >= 2);
+        QApplication::processEvents();
+
+        item0->removeRow(1);
+        item0->setText("OnlyOne");
+        delegate.count = 0;
+        QTRY_VERIFY(delegate.count >= 2);
+        QApplication::processEvents();
     }
 }