From 0c2a16c49c58fca02a4f3df0a31ee915d69065c8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= <tor.arne.vestbo@qt.io>
Date: Fri, 19 Jan 2024 12:00:45 +0100
Subject: [PATCH] tst_QWidget: Add test that WA_NativeWindow results in window
 handle

Pick-to: 6.7
Change-Id: I63a653a552be2a6435e0c068e47c2442e53642cb
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
---
 .../widgets/kernel/qwidget/tst_qwidget.cpp    | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
index 2baae53489..d06cc547cd 100644
--- a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
+++ b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
@@ -135,7 +135,9 @@ public:
 public slots:
     void initTestCase();
     void cleanup();
+
 private slots:
+    void nativeWindowAttribute();
     void addActionOverloads();
     void getSetCheck();
     void fontPropagation();
@@ -688,6 +690,24 @@ struct ImplicitlyConvertibleTo {
 void testFunction0() {}
 void testFunction1(bool) {}
 
+void tst_QWidget::nativeWindowAttribute()
+{
+    QWidget parent;
+    QWidget child(&parent);
+
+    QCOMPARE(parent.windowHandle(), nullptr);
+    QCOMPARE(child.windowHandle(), nullptr);
+
+    // Setting WA_NativeWindow should create window handle
+    parent.setAttribute(Qt::WA_NativeWindow);
+    QVERIFY(parent.windowHandle() != nullptr);
+    // But not its child's window handle
+    QCOMPARE(child.windowHandle(), nullptr);
+    // Until the child also gains WA_NativeWindow
+    child.setAttribute(Qt::WA_NativeWindow);
+    QVERIFY(child.windowHandle() != nullptr);
+}
+
 void tst_QWidget::addActionOverloads()
 {
     // almost exhaustive check of addAction() overloads: