def test_unlink_middleman_stops_view_of_leaf_models():
calls = []
parent = mvc.Model()
child = mvc.Model()
grandchild = mvc.Model()
mvc.link(parent, child)
mvc.link(child, grandchild)
def trigger_events():
with mvc.notifier(grandchild) as notify:
notify({"data": 1})
with mvc.notifier(child) as notify:
notify({"data": 2})
with mvc.notifier(parent) as notify:
notify({"data": 3})
copy = calls[:]
calls.clear()
return copy
@mvc.view(parent)
def viewer(value, events):
calls.append({"v": value, "e": list(events)})
mvc.unlink(parent, child)
assert trigger_events() == [{"v": parent, "e": [{"data": 3}]}]
def test_notifier_context_manager():
calls = []
m = mvc.Model()
@mvc.view(m)
def viewer(m, events):
calls.extend(events)
with mvc.notifier(m) as notify:
notify(data=1)
assert calls == []
assert calls == [{"data": 1}]
calls.clear()
with mvc.notifier(m) as notify:
notify(data=1)
notify(data=2)
assert calls == [{"data": 1}, {"data": 2}]