Stabilize tst_ForeignWindow::embedForeignWindow()

We only care about no longer being a child of the old parent window,
not what the system does when we reparent to nullptr.

Pick-to: 6.6
Change-Id: Ibd670432f0fd2595195d3951014a570dfdb7a998
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 1 insertions, 5 deletions

diff --git a/tests/auto/gui/kernel/qwindow/tst_foreignwindow.cpp b/tests/auto/gui/kernel/qwindow/tst_foreignwindow.cpp
index ac0f78be2d..86d31fe06e 100644
--- a/tests/auto/gui/kernel/qwindow/tst_foreignwindow.cpp
+++ b/tests/auto/gui/kernel/qwindow/tst_foreignwindow.cpp
@@ -82,17 +82,13 @@ void tst_ForeignWindow::embedForeignWindow()
     NativeWindow nativeWindow;
     QVERIFY(nativeWindow);
 
-    // Top level windows may not have 0 as their winId, e.g. on
-    // XCB the root window of the screen is used.
-    const auto originalParentWinId = nativeWindow.parentWinId();
-
     // As a prerequisite to that, we must be able to reparent the foreign window
     std::unique_ptr<QWindow> foreignWindow(QWindow::fromWinId(nativeWindow));
     foreignWindow->setParent(&parentWindow);
     QTRY_COMPARE(nativeWindow.parentWinId(), parentWindow.winId());
 
     foreignWindow->setParent(nullptr);
-    QTRY_COMPARE(nativeWindow.parentWinId(), originalParentWinId);
+    QTRY_VERIFY(nativeWindow.parentWinId() != parentWindow.winId());
 }
 
 void tst_ForeignWindow::embedInForeignWindow()