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#!/usr/bin/python
from circuits import Component, Event
class simple_event(Event):
complete = True
class test(Event):
"""test Event"""
success = True
class Nested3(Component):
channel = 'nested3'
def test(self):
"""Updating state. Must be called twice to reach final state."""
if self.root._state != 'Pre final state':
self.root._state = 'Pre final state'
else:
self.root._state = 'Final state'
class Nested2(Component):
channel = 'nested2'
def test(self):
"""Updating state."""
self.root._state = 'New state'
# State change involves even more components as well.
self.fire(test(), Nested3.channel)
self.fire(test(), Nested3.channel)
class Nested1(Component):
channel = 'nested1'
def test(self):
"""State change involves other components as well."""
self.fire(test(), Nested2.channel)
class App(Component):
channel = 'app'
_simple_event_completed = False
_state = 'Old state'
_state_when_success = None
_state_when_complete = None
def simple_event_complete(self, e, value):
self._simple_event_completed = True
def test(self):
"""Fire the test event that should produce a state change."""
evt = test()
evt.complete = True
evt.complete_channels = [self.channel]
self.fire(evt, Nested1.channel)
def test_success(self, e, value):
"""Test event has been processed, save the achieved state."""
self._state_when_success = self._state
def test_complete(self, e, value):
"""Test event has been completely processed, save the achieved state."""
self._state_when_complete = self._state
app = App()
Nested1().register(app)
Nested2().register(app)
Nested3().register(app)
while len(app):
app.flush()
def test_complete_simple():
"""Test if complete works for an event without further effects"""
app.fire(simple_event())
while len(app):
app.flush()
assert app._simple_event_completed
def test_complete_nested():
app.fire(test())
while len(app):
app.flush()
assert app._state_when_success == 'Old state'
assert app._state_when_complete == 'Final state'
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