tst_qquicklistview: make addOnCompleted more robust + sanity check

Check that after we could not find an element, we do not suddenly find
one afterwards.

Moreover, disable the cacheBuffer as the asynchronous creation might
cause issues, leading to the flakyness observed in QTBUG-77330

Task-number: QTBUG-77330
Change-Id: I444eede16a99a75340a0b7ccf17193298730a675
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/auto/quick/qquicklistview/tst_qquicklistview.cpp b/tests/auto/quick/qquicklistview/tst_qquicklistview.cpp
index 127c873bbb..b896418de0 100644
--- a/tests/auto/quick/qquicklistview/tst_qquicklistview.cpp
+++ b/tests/auto/quick/qquicklistview/tst_qquicklistview.cpp
@@ -8956,6 +8956,7 @@ void tst_QQuickListView::addOnCompleted()
                 y = 9999999;
             } else {
                 const qreal newY = item->y();
+                QVERIFY(newY != 9999999); // once we could not find an item, we shouldn' find any further ones
                 QVERIFY2(newY > y, objName.toUtf8().constData());
                 y = newY;
             }