pysize-0.2.tar.gz: pysize-0.2/tests/tests/observable.py

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    1 # This program is free software; you can redistribute it and/or modify
    2 # it under the terms of the GNU General Public License as published by
    3 # the Free Software Foundation; either version 2 of the License, or
    4 # (at your option) any later version.
    5 #
    6 # This program is distributed in the hope that it will be useful,
    7 # but WITHOUT ANY WARRANTY; without even the implied warranty of
    8 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    9 # GNU Library General Public License for more details.
   10 #
   11 # You should have received a copy of the GNU General Public License
   12 # along with this program; if not, write to the Free Software
   13 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   14 #
   15 # See the COPYING file for license information.
   16 #
   17 # Copyright (c) 2006, 2007 Guillaume Chazarain <guichaz@yahoo.fr>
   18 
   19 import unittest
   20 from pysize.core.observable import observable
   21 
   22 class TestObservable(unittest.TestCase):
   23     def testObservableAddRemove(self):
   24         cb = lambda : 1/0
   25         o = observable()
   26         o.fire_observers()
   27         o.add_observer(cb)
   28         o.del_observer(cb)
   29         o.fire_observers()
   30         self.assertRaises(ValueError, o.del_observer, cb)
   31 
   32     def testObservableCopy(self):
   33         def cb(observer):
   34             observer.add_observer(cb)
   35             self.nr_calls += 1
   36         o = observable()
   37         o.add_observer(cb)
   38         o.add_observer(cb)
   39         self.nr_calls = 0
   40         o.fire_observers(o)
   41         self.assertEqual(self.nr_calls, 2)
   42         o.fire_observers(o)
   43         self.assertEqual(self.nr_calls, 6)
   44         o.fire_observers(o)
   45         self.assertEqual(self.nr_calls, 14)
   46         o.fire_observers(o)
   47         self.assertEqual(self.nr_calls, 30)
   48 
   49 
   50 TESTS = (TestObservable,)