QMenu auto-test: Add test for two-level tearable menus

This has been fixed in 5.6.1 but we can afford the extra test
to guard against regressions.

The setup for this test is two menus, one parent of the other.
The submenu is tearable. We open the parent menu, open its
submenu and then move the mouse cursor straight over the
submenu's tear-off area. The submenu should stay open even
after a short delay.

Change-Id: Ia8ad326d78dde31b6dd91b0ebacf0db1898715d4
Task-number: QTBUG-53068
Reviewed-by: Błażej Szczygieł <spaz16@wp.pl>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>

1 files changed, 46 insertions, 0 deletions

diff --git a/tests/auto/widgets/widgets/qmenu/tst_qmenu.cpp b/tests/auto/widgets/widgets/qmenu/tst_qmenu.cpp
index 20f17f6e9e..4deade0b4d 100644
--- a/tests/auto/widgets/widgets/qmenu/tst_qmenu.cpp
+++ b/tests/auto/widgets/widgets/qmenu/tst_qmenu.cpp
@@ -90,6 +90,7 @@ private slots:
     void mouseActivation();
 #endif
     void tearOff();
+    void submenuTearOffDontClose();
     void layoutDirection();
 
     void task208001_stylesheet();
@@ -631,6 +632,51 @@ void tst_QMenu::tearOff()
     QVERIFY(!torn->isVisible());
 }
 
+void tst_QMenu::submenuTearOffDontClose()
+{
+    QWidget widget;
+    QMenu *menu = new QMenu(&widget);
+    QVERIFY(!menu->isTearOffEnabled()); //default value
+    menu->setTearOffEnabled(true);
+    QVERIFY(menu->isTearOffEnabled());
+    QMenu *submenu = new QMenu(&widget);
+    submenu->addAction("aaa");
+    submenu->addAction("bbb");
+    QVERIFY(!submenu->isTearOffEnabled()); //default value
+    submenu->setTearOffEnabled(true);
+    QVERIFY(submenu->isTearOffEnabled());
+    menu->addMenu(submenu);
+
+    widget.resize(300, 200);
+    centerOnScreen(&widget);
+    widget.show();
+    widget.activateWindow();
+    QVERIFY(QTest::qWaitForWindowActive(&widget));
+    // Show parent menu
+    menu->popup(widget.geometry().topRight() + QPoint(50, 0));
+    QVERIFY(QTest::qWaitForWindowActive(menu));
+    // Then its submenu
+    const QRect submenuRect = menu->actionGeometry(menu->actions().at(0));
+    const QPoint submenuPos(submenuRect.topLeft() + QPoint(3, 3));
+    // Move then click to avoid the submenu moves from causing it to close
+    QTest::mouseMove(menu, submenuPos, 100);
+    QTest::mouseClick(menu, Qt::LeftButton, 0, submenuPos, 100);
+    QTRY_VERIFY(QTest::qWaitForWindowActive(submenu));
+    // Make sure we enter the submenu frame directly on the tear-off area
+    QTest::mouseMove(submenu, QPoint(10, 3), 100);
+    if (submenu->style()->styleHint(QStyle::SH_Menu_SubMenuDontStartSloppyOnLeave)) {
+        qWarning("Sloppy menu timer disabled by the style: %s", qPrintable(QApplication::style()->objectName()));
+        // Submenu must get the enter event
+        QTRY_VERIFY(submenu->underMouse());
+    } else {
+        const int closeTimeout = submenu->style()->styleHint(QStyle::SH_Menu_SubMenuSloppyCloseTimeout);
+        QTest::qWait(closeTimeout + 100);
+        // Menu must not disappear and it must get the enter event
+        QVERIFY(submenu->isVisible());
+        QVERIFY(submenu->underMouse());
+    }
+}
+
 void tst_QMenu::layoutDirection()
 {
     QMainWindow win;