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Viewing changes to bzrlib/selftest/testtransactions.py

  • Committer: Bazaar Package Importer
  • Author(s): Jeff Bailey
  • Date: 2005-11-07 13:17:53 UTC
  • Revision ID: james.westby@ubuntu.com-20051107131753-qsy145z1rfug5i27
Tags: upstream-0.6.2
Import upstream version 0.6.2

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bzrlib/selftest/testtransactions.py
 
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# Copyright (C) 2005 by Canonical Ltd
 
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#   Authors: Robert Collins <robert.collins@canonical.com>
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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"""Tests for the behaviour of the Transaction concept in bzr."""
 
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# import system imports here
 
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import os
 
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import sys
 
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#import bzrlib specific imports here
 
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import bzrlib.errors as errors
 
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from bzrlib.selftest import TestCase, TestCaseInTempDir
 
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import bzrlib.transactions as transactions
 
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class DummyWeave(object):
 
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    """A class that can be instantiated and compared."""
 
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    def __init__(self, message):
 
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        self._message = message
 
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    def __eq__(self, other):
 
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        if other is None:
 
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            return False
 
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        return self._message == other._message
 
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41
 
 
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class TestSymbols(TestCase):
 
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    def test_public_symbols(self):
 
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        from bzrlib.transactions import ReadOnlyTransaction
 
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        from bzrlib.transactions import PassThroughTransaction
 
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48
 
 
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class TestReadOnlyTransaction(TestCase):
 
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    def setUp(self):
 
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        self.transaction = transactions.ReadOnlyTransaction()
 
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        super(TestReadOnlyTransaction, self).setUp()
 
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    def test_register_clean(self):
 
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        self.transaction.register_clean("anobject")
 
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    def test_register_dirty_raises(self):
 
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        self.assertRaises(errors.ReadOnlyError, 
 
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                          self.transaction.register_dirty,"anobject")
 
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    def test_commit_raises(self):
 
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        self.assertRaises(errors.CommitNotPossible, self.transaction.commit)
 
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    def test_map(self):
 
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        self.assertNotEqual(None, getattr(self.transaction, "map", None))
 
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    def test_add_and_get(self):
 
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        weave = "a weave"
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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    def test_rollback_returns(self):
 
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        self.transaction.rollback()
 
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    def test_finish_returns(self):
 
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        self.transaction.finish()
 
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    def test_zero_size_cache(self):
 
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        self.transaction.set_cache_size(0)
 
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        weave = DummyWeave('a weave')
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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        weave = None
 
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        # add an object, should fall right out if there are no references
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
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        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
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        # but if we have a reference it should stick around
 
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        weave = DummyWeave("another weave")
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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        del weave
 
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        # its not a weakref system
 
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        self.assertEqual(DummyWeave("another weave"),
 
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                         self.transaction.map.find_weave("id"))
 
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    def test_small_cache(self):
 
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        self.transaction.set_cache_size(1)
 
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        # add an object, should not fall right out if there are no references
 
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        #sys.getrefcounts(foo)
 
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        self.transaction.map.add_weave("id", DummyWeave("a weave"))
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
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        self.assertEqual(DummyWeave("a weave"),
 
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                         self.transaction.map.find_weave("id"))
 
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        self.transaction.map.add_weave("id2", DummyWeave("a weave also"))
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id2"))
 
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        # currently a fifo
 
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        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
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        self.assertEqual(DummyWeave("a weave also"),
 
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                         self.transaction.map.find_weave("id2"))
 
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    def test_small_cache_with_references(self):
 
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        # if we have a reference it should stick around
 
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        weave = "a weave"
 
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        weave2 = "another weave"
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.transaction.map.add_weave("id2", weave2)
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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        self.assertEqual(weave2, self.transaction.map.find_weave("id2"))
 
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        weave = None
 
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        # its not a weakref system
 
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        self.assertEqual("a weave", self.transaction.map.find_weave("id"))
 
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    def test_precious_with_zero_size_cache(self):
 
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        self.transaction.set_cache_size(0)
 
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        weave = DummyWeave('a weave')
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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        weave = None
 
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        # add an object, should not fall out even with no references.
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id"),
 
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                                        precious=True)
 
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        self.assertEqual(DummyWeave('a weave'),
 
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                         self.transaction.map.find_weave("id"))
 
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137
    def test_precious_revision_history(self):
 
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        """Disabled test until revision-history is a real object."""
 
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        print "Disabled: test_precious_revision_history"
 
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        return
 
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        self.transaction.set_cache_size(0)
 
142
        history = []
 
143
        self.transaction.map.add_revision_history(history)
 
144
        self.assertEqual(history, self.transaction.map.find_revision_history())
 
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        history = None
 
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        # add an object, should not fall out even with no references.
 
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        self.transaction.register_clean(
 
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            self.transaction.map.find_revision_history(), precious=True)
 
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        self.assertEqual([], self.transaction.map.find_revision_history())
 
150
 
 
151
 
 
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class TestPassThroughTransaction(TestCase):
 
153
 
 
154
    def test_construct(self):
 
155
        transactions.PassThroughTransaction()
 
156
 
 
157
    def test_register_clean(self):
 
158
        transaction = transactions.PassThroughTransaction()
 
159
        transaction.register_clean("anobject")
 
160
    
 
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    def test_register_dirty(self):
 
162
        transaction = transactions.PassThroughTransaction()
 
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        transaction.register_dirty("anobject")
 
164
    
 
165
    def test_commit_nothing_returns(self):
 
166
        transaction = transactions.PassThroughTransaction()
 
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        transaction.commit()
 
168
 
 
169
    def test_map(self):
 
170
        transaction = transactions.PassThroughTransaction()
 
171
        self.assertNotEqual(None, getattr(transaction, "map", None))
 
172
    
 
173
    def test_add_and_get(self):
 
174
        transaction = transactions.PassThroughTransaction()
 
175
        weave = "a weave"
 
176
        transaction.map.add_weave("id", weave)
 
177
        self.assertEqual(None, transaction.map.find_weave("id"))
 
178
        
 
179
    def test_rollback_asserts(self):
 
180
        transaction = transactions.PassThroughTransaction()
 
181
        self.assertRaises(errors.AlreadyCommitted, transaction.rollback)
 
182
 
 
183
    def test_finish_returns(self):
 
184
        transaction = transactions.PassThroughTransaction()
 
185
        transaction.finish()
 
186
 
 
187
    def test_cache_is_ignored(self):
 
188
        transaction = transactions.PassThroughTransaction()
 
189
        transaction.set_cache_size(100)
 
190
        weave = "a weave"
 
191
        transaction.map.add_weave("id", weave)
 
192
        self.assertEqual(None, transaction.map.find_weave("id"))