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# -*- coding: utf-8 -*-
# ******************************************************************************
#
# Copyright (C) 2009 Olivier Tilloy <olivier@tilloy.net>
#
# This file is part of the pyexiv2 distribution.
#
# pyexiv2 is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# pyexiv2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with pyexiv2; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
#
# Author: Olivier Tilloy <olivier@tilloy.net>
#
# ******************************************************************************
import unittest
from pyexiv2 import ListenerInterface, NotifyingList
import random
class SimpleListener(ListenerInterface):
# Total number of notifications
notifications = 0
# Last notification: (method_name, args)
last = None
def _notify(self, method_name, *args):
self.notifications += 1
self.last = (method_name, args)
def items_changed(self, start_index, items):
self._notify('items_changed', start_index, items)
def items_deleted(self, start_index, end_index):
self._notify('items_deleted', start_index, end_index)
def items_inserted(self, start_index, items):
self._notify('items_inserted', start_index, items)
def reordered(self):
self._notify('reordered')
class TestNotifyingList(unittest.TestCase):
def setUp(self):
self.values = NotifyingList([5, 7, 9, 14, 57, 3, 2])
def test_no_listener(self):
# No listener is registered, nothing should happen.
self.values[3] = 13
# TODO: test all operations (insertion, deletion, slicing, ...)
def test_listener_interface(self):
self.values.register_listener(ListenerInterface())
self.failUnlessRaises(NotImplementedError,
self.values.__setitem__, 3, 13)
self.failUnlessRaises(NotImplementedError, self.values.__delitem__, 5)
self.failUnlessRaises(NotImplementedError, self.values.append, 17)
self.failUnlessRaises(NotImplementedError, self.values.extend, [11, 22])
self.failUnlessRaises(NotImplementedError, self.values.insert, 4, 24)
self.failUnlessRaises(NotImplementedError, self.values.pop)
self.failUnlessRaises(NotImplementedError, self.values.remove, 9)
# TODO: test all operations (insertion, slicing, ...)
def test_multiple_listeners(self):
# Register a random number of listeners
listeners = [SimpleListener() for i in xrange(random.randint(3, 20))]
for listener in listeners:
self.values.register_listener(listener)
self.values[3] = 13
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 3, 2])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 1)
self.failUnlessEqual(listener.last, ('items_changed', (3, [13])))
self.failUnlessRaises(IndexError, self.values.__setitem__, 9, 27)
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 3, 2])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 1)
self.failUnlessEqual(listener.last, ('items_changed', (3, [13])))
del self.values[5]
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 2])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 2)
self.failUnlessEqual(listener.last, ('items_deleted', (5, 6)))
self.failUnlessRaises(IndexError, self.values.__delitem__, 9)
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 2])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 2)
self.failUnlessEqual(listener.last, ('items_deleted', (5, 6)))
self.values.append(17)
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 2, 17])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 3)
self.failUnlessEqual(listener.last, ('items_inserted', (6, [17])))
self.values.extend([11, 22])
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 2, 17, 11, 22])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 4)
self.failUnlessEqual(listener.last,
('items_inserted', (7, [11, 22])))
self.failUnlessRaises(TypeError, self.values.extend, 26)
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 2, 17, 11, 22])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 4)
self.failUnlessEqual(listener.last,
('items_inserted', (7, [11, 22])))
self.values.insert(4, 24)
self.failUnlessEqual(self.values, [5, 7, 9, 13, 24, 57, 2, 17, 11, 22])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 5)
self.failUnlessEqual(listener.last, ('items_inserted', (4, [24])))
self.values.pop()
self.failUnlessEqual(self.values, [5, 7, 9, 13, 24, 57, 2, 17, 11])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 6)
self.failUnlessEqual(listener.last, ('items_deleted', (9, 10)))
self.values.pop(4)
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 2, 17, 11])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 7)
self.failUnlessEqual(listener.last, ('items_deleted', (4, 5)))
self.failUnlessRaises(IndexError, self.values.pop, 33)
self.failUnlessEqual(self.values, [5, 7, 9, 13, 57, 2, 17, 11])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 7)
self.failUnlessEqual(listener.last, ('items_deleted', (4, 5)))
self.values.remove(9)
self.failUnlessEqual(self.values, [5, 7, 13, 57, 2, 17, 11])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 8)
self.failUnlessEqual(listener.last, ('items_deleted', (2, 3)))
self.failUnlessRaises(ValueError, self.values.remove, 33)
self.failUnlessEqual(self.values, [5, 7, 13, 57, 2, 17, 11])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 8)
self.failUnlessEqual(listener.last, ('items_deleted', (2, 3)))
self.values.reverse()
self.failUnlessEqual(self.values, [11, 17, 2, 57, 13, 7, 5])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 9)
self.failUnlessEqual(listener.last, ('reordered', ()))
self.values.sort()
self.failUnlessEqual(self.values, [2, 5, 7, 11, 13, 17, 57])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 10)
self.failUnlessEqual(listener.last, ('reordered', ()))
self.values.sort(cmp=lambda x, y: y - x)
self.failUnlessEqual(self.values, [57, 17, 13, 11, 7, 5, 2])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 11)
self.failUnlessEqual(listener.last, ('reordered', ()))
self.values.sort(key=lambda x: x * x)
self.failUnlessEqual(self.values, [2, 5, 7, 11, 13, 17, 57])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 12)
self.failUnlessEqual(listener.last, ('reordered', ()))
self.values.sort(reverse=True)
self.failUnlessEqual(self.values, [57, 17, 13, 11, 7, 5, 2])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 13)
self.failUnlessEqual(listener.last, ('reordered', ()))
self.values += [44, 31, 19]
self.failUnlessEqual(self.values, [57, 17, 13, 11, 7, 5, 2, 44, 31, 19])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 14)
self.failUnlessEqual(listener.last,
('items_inserted', (7, [44, 31, 19])))
self.values *= 3
self.failUnlessEqual(self.values,
[57, 17, 13, 11, 7, 5, 2, 44, 31, 19,
57, 17, 13, 11, 7, 5, 2, 44, 31, 19,
57, 17, 13, 11, 7, 5, 2, 44, 31, 19])
for listener in listeners:
self.failUnlessEqual(listener.notifications, 15)
self.failUnlessEqual(listener.last,
('items_inserted',
(10, [57, 17, 13, 11, 7, 5, 2, 44, 31, 19,
57, 17, 13, 11, 7, 5, 2, 44, 31, 19])))
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