def test_braking_big_diamond(self):
"""
Test diamond shaped dependencies a -> b -> c -> d, a -> b' -> c' -> d
"""
A = self.A
a = A()
watcher = EventWatcher(a, self.dispatcher, self._handler)
watcher.watch("one.two.one.two")
# watcher.watch('one.one.one.one')
watcher.subscribe_all()
a.one = A()
a.one.two = A()
a.one.two = A()
a.one.two[0].one = A()
a.one.two[1].one = A()
a.one.two[0].one.two = A()
a.one.two[1].one.two = a.one.two[0].one.two[0]
assert len(self.events) == 7
assert len(self.dispatcher._handlers) == 6
del a.one.two[0].one
# a.unlink()
watcher.unsubscribe_all()
watcher.unsubscribe_all()
assert len(self.dispatcher._handlers) == 0
def test_cyclic(self):
"""Test cyclic dependency a -> b -> c -> a."""
A = self.A
a = A()
watcher = EventWatcher(a, self.dispatcher, self._handler)
watcher.watch("one.two.one.two")
a.one = A()
a.one.two = A()
a.one.two = A()
a.one.two[0].one = a
assert 4 == len(self.events)
a.unlink()
assert 2 == len(self.dispatcher._handlers)
def test_diamond(self):
"""Test diamond shaped dependencies a -> b -> c, a -> b' -> c."""
A = self.A
a = A()
watcher = EventWatcher(a, self.dispatcher, self._handler)
watcher.watch("one.two.one.two")
a.one = A()
a.one.two = A()
a.one.two = A()
a.one.two[0].one = A()
a.one.two[1].one = a.one.two[0].one
a.one.two[0].one.two = A()
assert len(self.events) == 6
a.unlink()
watcher.unsubscribe_all()
watcher.unsubscribe_all()
def watcher(self, element: Element, default_handler=None):
element_dispatcher = self.element_dispatcher
return EventWatcher(element, element_dispatcher, default_handler)