def test_subscriptions():
svc = BaseService()
client = mock.Mock()
svc.subscribe('foo_event', client.on_foo)
svc.notify_subscribers('foo_event', 1, 2, 3, value='hello')
deliver_pending_notifications()
client.on_foo.assert_called_once_with(1, 2, 3, value='hello')
client.reset_mock()
svc.notify_subscribers('bar_event')
deliver_pending_notifications()
assert not client.on_foo.called
def test_unsubscribe():
svc = BaseService()
client = mock.Mock()
svc.subscribe('foo_event', client.on_foo)
svc.notify_subscribers('foo_event')
deliver_pending_notifications()
client.on_foo.assert_called_once_with()
client.reset_mock()
svc.unsubscribe(client.on_foo)
svc.notify_subscribers('foo_event')
deliver_pending_notifications()
assert not client.on_foo.called
