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#
# Copyright (c) 2006, 2007 Canonical
#
# Written by Gustavo Niemeyer <gustavo@niemeyer.net>
#
# This file is part of Storm Object Relational Mapper.
#
# Storm is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of
# the License, or (at your option) any later version.
#
# Storm is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from storm.event import EventSystem
from tests.helper import TestHelper
class Marker(object):
pass
marker = Marker()
class EventTest(TestHelper):
def setUp(self):
TestHelper.setUp(self)
self.event = EventSystem(marker)
def test_hook_unhook_emit(self):
called1 = []
called2 = []
def callback1(owner, arg1, arg2):
called1.append((owner, arg1, arg2))
def callback2(owner, arg1, arg2, data1, data2):
called2.append((owner, arg1, arg2, data1, data2))
self.event.hook("one", callback1)
self.event.hook("one", callback1)
self.event.hook("one", callback2, 10, 20)
self.event.hook("two", callback2, 10, 20)
self.event.hook("two", callback2, 10, 20)
self.event.hook("two", callback2, 30, 40)
self.event.hook("three", callback1)
self.event.emit("one", 1, 2)
self.event.emit("two", 3, 4)
self.event.unhook("two", callback2, 10, 20)
self.event.emit("two", 3, 4)
self.event.emit("three", 5, 6)
self.assertEquals(sorted(called1), [
(marker, 1, 2),
(marker, 5, 6),
])
self.assertEquals(sorted(called2), [
(marker, 1, 2, 10, 20),
(marker, 3, 4, 10, 20),
(marker, 3, 4, 30, 40),
(marker, 3, 4, 30, 40),
])
def test_unhook_by_returning_false(self):
called = []
def callback(owner):
called.append(owner)
return len(called) < 2
self.event.hook("event", callback)
self.event.emit("event")
self.event.emit("event")
self.event.emit("event")
self.event.emit("event")
self.assertEquals(called, [marker, marker])
def test_weak_reference(self):
marker = Marker()
called = []
def callback(owner):
called.append(owner)
self.event = EventSystem(marker)
self.event.hook("event", callback)
self.event.emit("event")
self.assertEquals(called, [marker])
del called[:]
del marker
self.event.emit("event")
self.assertEquals(called, [])
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