Fix assertion failure when hiding a SplitView with only one item

Check for -1 when calling handleIndexForSplitIndex().

Change-Id: I81021b64265ace0c47269ea54e538a2725c84b79
Fixes: QTBUG-79270
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/auto/controls/data/tst_splitview.qml b/tests/auto/controls/data/tst_splitview.qml
index a03c09a0..bd36e898 100644
--- a/tests/auto/controls/data/tst_splitview.qml
+++ b/tests/auto/controls/data/tst_splitview.qml
@@ -1958,4 +1958,20 @@ TestCase {
         mouseRelease(targetHandle, -100, targetHandle.height / 2, Qt.LeftButton)
         verify(!control.resizing)
     }
+
+    Component {
+        id: oneItemComponent
+
+        SplitView {
+            Item {}
+        }
+    }
+
+    // QTBUG-79270
+    function test_hideSplitViewWithOneItem() {
+        var control = createTemporaryObject(oneItemComponent, testCase)
+        verify(control)
+        // Shouldn't be an assertion failure.
+        control.visible = false
+    }
 }