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import sys
import pyqtgraph as pg
from pyqtgraph.Qt import QtWidgets
def test_qmenu_leak_workaround():
# refer to https://github.com/pyqtgraph/pyqtgraph/pull/2518
pg.mkQApp()
topmenu = QtWidgets.QMenu()
submenu = QtWidgets.QMenu()
refcnt1 = sys.getrefcount(submenu)
# check that after the workaround,
# submenu has no change in refcnt
topmenu.addMenu(submenu)
submenu.setParent(None) # this is the workaround for PySide{2,6},
# and should have no effect on bindings
# where it is not needed.
refcnt2 = sys.getrefcount(submenu)
assert refcnt2 == refcnt1
# check that topmenu is not a C++ parent of submenu.
# i.e. deleting topmenu leaves submenu alive
del topmenu
assert pg.Qt.isQObjectAlive(submenu)
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