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import faulthandler
import weakref
import pyqtgraph as pg
faulthandler.enable()
pg.mkQApp()
def test_getViewWidget():
view = pg.PlotWidget()
vref = weakref.ref(view)
item = pg.InfiniteLine()
view.addItem(item)
assert item.getViewWidget() is view
del view
assert vref() is None
assert item.getViewWidget() is None
def test_getViewWidget_deleted():
view = pg.PlotWidget()
item = pg.InfiniteLine()
view.addItem(item)
assert item.getViewWidget() is view
# Arrange to have Qt automatically delete the view widget
obj = pg.QtWidgets.QWidget()
view.setParent(obj)
del obj
assert not pg.Qt.isQObjectAlive(view)
assert item.getViewWidget() is None
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