def test_can_call_observers_before_executing_decorated_message(self):
event = Event([])
observes(event)(self.probe)
def guard_probe(*args, **kwargs):
assert_not_contains('probe', kwargs)
kwargs['guard_probe'] = True
return (args, kwargs)
observes(event, run_before=True)(guard_probe)
def function(*args, **kwargs):
return {'args': list(args), 'kwargs': kwargs}
decorated_function = observable(event)(function)
expected = {
'args': ['foo'],
'kwargs': {
'bar': True,
'guard_probe': True
},
'probe': True
}
assert_equals(expected, decorated_function('foo', bar=True))
def test_observers_can_request_priority(self):
def second_probe(result):
pass
event = Event([])
observes(event)(self.probe)
observes(event, appendleft=True)(second_probe)
assert_length(2, event.observers)
assert_equals([second_probe, self.probe], list(event.observers))
def test_calls_observers_after_function_was_executed(self):
event = Event([])
observes(event)(self.probe)
def function(*args, **kwargs):
return {'args': list(args), 'kwargs': kwargs}
decorated_function = observable(event)(function)
result = decorated_function('foo', bar=True)
assert_equals({
'args': ['foo'],
'kwargs': {
'bar': True
},
'probe': True
}, result)
def setUp(self):
self.observers_called = 0
self.event = Event()
def test_can_observe_event(self):
event = Event([])
observes(event)(self.probe)
assert_length(1, event.observers)
assert_equals(self.probe, event.observers[0])
def test_catches_unknown_keyword_parameters_in_constructor(self):
e = assert_raises(TypeError, lambda: observes(Event(), invalid=True))
assert_equals(
"TypeError: observes() got an unexpected keyword argument 'invalid'",
e.args[0])