Add client test for hiding the toplevel parent of a popup

This used to cause undefined behavior.

Task-number: QTBUG-80562
Change-Id: I0397b7b304f316616d2a713063bc5a634dc081bc
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

1 files changed, 45 insertions, 0 deletions

diff --git a/tests/auto/client/xdgshell/tst_xdgshell.cpp b/tests/auto/client/xdgshell/tst_xdgshell.cpp
index d1c2882a0..2277bbb80 100644
--- a/tests/auto/client/xdgshell/tst_xdgshell.cpp
+++ b/tests/auto/client/xdgshell/tst_xdgshell.cpp
@@ -46,6 +46,7 @@ private slots:
     void popup();
     void tooltipOnPopup();
     void switchPopups();
+    void hidePopupParent();
     void pongs();
     void minMaxSize();
     void windowGeometry();
@@ -429,6 +430,50 @@ void tst_xdgshell::switchPopups()
     QCOMPOSITOR_TRY_VERIFY(xdgPopup()->m_xdgSurface->m_committedConfigureSerial);
 }
 
+void tst_xdgshell::hidePopupParent()
+{
+    class Window : public QRasterWindow {
+    public:
+        void mousePressEvent(QMouseEvent *event) override
+        {
+            QRasterWindow::mousePressEvent(event);
+            m_popup.reset(new QRasterWindow);
+            m_popup->setTransientParent(this);
+            m_popup->setFlags(Qt::Popup);
+            m_popup->resize(100, 100);
+            m_popup->show();
+        }
+        QScopedPointer<QRasterWindow> m_popup;
+    };
+    Window window;
+    window.resize(200, 200);
+    window.show();
+
+    QCOMPOSITOR_TRY_VERIFY(xdgToplevel());
+    exec([=] { xdgToplevel()->sendCompleteConfigure(); });
+    QCOMPOSITOR_TRY_VERIFY(xdgToplevel()->m_xdgSurface->m_committedConfigureSerial);
+
+    exec([=] {
+        auto *surface = xdgToplevel()->surface();
+        auto *p = pointer();
+        auto *c = client();
+        p->sendEnter(surface, {100, 100});
+        p->sendFrame(c);
+        p->sendButton(c, BTN_LEFT, Pointer::button_state_pressed);
+        p->sendButton(c, BTN_LEFT, Pointer::button_state_released);
+        p->sendFrame(c);
+    });
+    QCOMPOSITOR_TRY_VERIFY(xdgPopup());
+    exec([=] {
+        xdgPopup()->sendConfigure(QRect(100, 100, 100, 100));
+        xdgPopup()->m_xdgSurface->sendConfigure();
+    });
+    QCOMPOSITOR_TRY_VERIFY(xdgPopup()->m_xdgSurface->m_committedConfigureSerial);
+
+    window.hide();
+    QCOMPOSITOR_TRY_VERIFY(!xdgToplevel());
+}
+
 void tst_xdgshell::pongs()
 {
     // Create and show a window to trigger shell integration initialzation,