def test_double_propagation(self):
class MiddleMan(SimpleObservable):
def __init__(self):
self.children = ObservableList()
# Create an observable list in an observable in an onbservable list
parent = ObservableList()
# Subscribe to the to-level list
parent.subscribe("__all__", self.callback)
# Add something to it
middle_man = MiddleMan()
parent.append(middle_man)
# Ensure this tells us the item was added at index 0 of the top-level
self.assertEqual((0, "add", middle_man), self.callback_result)
# Add a few things to the inner list
middle_man.children.append("hi!")
middle_man.children.append("hello!")
# Ensure we get told the string was added at parent[0].children[0]
self.assertEqual(((0, "children", 1), "add", "hello!"), self.callback_result)
def test_remove(self):
# Create an observable dict
observable_list = ObservableList("one", "of", "these", "things")
# Subscribe to remove events
subscription = observable_list.subscribe("remove", self.callback)
# Remove an item from it
del observable_list[2]
# Ensure this triggered the callback
self.assertEqual((2, "these"), self.callback_result)
def test_change(self):
# Create an observable dict
observable_list = ObservableList("something", "might", "change")
# Subscribe to change events
subscription = observable_list.subscribe("change", self.callback)
# Change an item in it
observable_list[1] = "will"
# Ensure this triggered the callback
self.assertEqual((1, "will"), self.callback_result)
def test_add(self):
# Create an observable list
observable_list = ObservableList()
# Subscribe to add events
subscription = observable_list.subscribe("add", self.callback)
# Add an item to it
observable_list.append("nom")
# Ensure this triggered the callback
self.assertEqual((0, "nom"), self.callback_result)
def test_propagation(self):
class Alerter(SimpleObservable):
def alert(self):
self._notify(None, "alert", "Alert!")
# Create an observable list that contains other observables
observable_list = ObservableList(Alerter(), Alerter())
# Subscribe to all events
subscription = observable_list.subscribe("__all__", self.callback)
# Trigger an alert on something in the list
observable_list[1].alert()
# Ensure this triggered the callback
self.assertEqual(((1, None), "alert", "Alert!"), self.callback_result)
