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141 lines
4.1 KiB
Python
141 lines
4.1 KiB
Python
# Copyright 2013 Hardcoded Software (http://www.hardcoded.net)
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# This software is licensed under the "BSD" License as described in the "LICENSE" file,
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# which should be included with this package. The terms are also available at
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# http://www.hardcoded.net/licenses/bsd_license
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from ..testutil import eq_
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from ..notify import Broadcaster, Listener, Repeater
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class HelloListener(Listener):
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def __init__(self, broadcaster):
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Listener.__init__(self, broadcaster)
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self.hello_count = 0
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def hello(self):
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self.hello_count += 1
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class HelloRepeater(Repeater):
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def __init__(self, broadcaster):
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Repeater.__init__(self, broadcaster)
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self.hello_count = 0
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def hello(self):
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self.hello_count += 1
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def create_pair():
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b = Broadcaster()
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l = HelloListener(b)
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return b, l
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def test_disconnect_during_notification():
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# When a listener disconnects another listener the other listener will not receive a
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# notification.
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# This whole complication scheme below is because the order of the notification is not
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# guaranteed. We could disconnect everything from self.broadcaster.listeners, but this
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# member is supposed to be private. Hence, the '.other' scheme
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class Disconnecter(Listener):
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def __init__(self, broadcaster):
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Listener.__init__(self, broadcaster)
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self.hello_count = 0
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def hello(self):
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self.hello_count += 1
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self.other.disconnect()
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broadcaster = Broadcaster()
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first = Disconnecter(broadcaster)
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second = Disconnecter(broadcaster)
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first.other, second.other = second, first
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first.connect()
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second.connect()
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broadcaster.notify('hello')
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# only one of them was notified
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eq_(first.hello_count + second.hello_count, 1)
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def test_disconnect():
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# After a disconnect, the listener doesn't hear anything.
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b, l = create_pair()
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l.connect()
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l.disconnect()
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b.notify('hello')
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eq_(l.hello_count, 0)
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def test_disconnect_when_not_connected():
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# When disconnecting an already disconnected listener, nothing happens.
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b, l = create_pair()
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l.disconnect()
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def test_not_connected_on_init():
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# A listener is not initialized connected.
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b, l = create_pair()
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b.notify('hello')
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eq_(l.hello_count, 0)
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def test_notify():
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# The listener listens to the broadcaster.
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b, l = create_pair()
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l.connect()
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b.notify('hello')
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eq_(l.hello_count, 1)
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def test_reconnect():
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# It's possible to reconnect a listener after disconnection.
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b, l = create_pair()
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l.connect()
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l.disconnect()
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l.connect()
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b.notify('hello')
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eq_(l.hello_count, 1)
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def test_repeater():
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b = Broadcaster()
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r = HelloRepeater(b)
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l = HelloListener(r)
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r.connect()
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l.connect()
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b.notify('hello')
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eq_(r.hello_count, 1)
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eq_(l.hello_count, 1)
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def test_repeater_with_repeated_notifications():
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# If REPEATED_NOTIFICATIONS is not empty, only notifs in this set are repeated (but they're
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# still dispatched locally).
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class MyRepeater(HelloRepeater):
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REPEATED_NOTIFICATIONS = set(['hello'])
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def __init__(self, broadcaster):
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HelloRepeater.__init__(self, broadcaster)
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self.foo_count = 0
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def foo(self):
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self.foo_count += 1
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b = Broadcaster()
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r = MyRepeater(b)
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l = HelloListener(r)
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r.connect()
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l.connect()
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b.notify('hello')
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b.notify('foo') # if the repeater repeated this notif, we'd get a crash on HelloListener
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eq_(r.hello_count, 1)
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eq_(l.hello_count, 1)
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eq_(r.foo_count, 1)
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def test_repeater_doesnt_try_to_dispatch_to_self_if_it_cant():
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# if a repeater doesn't handle a particular message, it doesn't crash and simply repeats it.
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b = Broadcaster()
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r = Repeater(b) # doesnt handle hello
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l = HelloListener(r)
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r.connect()
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l.connect()
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b.notify('hello') # no crash
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eq_(l.hello_count, 1)
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def test_bind_messages():
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b, l = create_pair()
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l.bind_messages({'foo', 'bar'}, l.hello)
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l.connect()
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b.notify('foo')
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b.notify('bar')
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b.notify('hello') # Normal dispatching still work
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eq_(l.hello_count, 3)
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