tests/tests/observable.py

   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, 2008 Guillaume Chazarain <guichaz@gmail.com>
  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,)