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Viewing changes to bzrlib/tests/test_transactions.py

  • Committer: John Arbash Meinel
  • Date: 2011-05-11 11:35:28 UTC
  • mto: This revision was merged to the branch mainline in revision 5851.
  • Revision ID: john@arbash-meinel.com-20110511113528-qepibuwxicjrbb2h
Break compatibility with python <2.6.

This includes auditing the code for places where we were doing
explicit 'sys.version' checks and removing them as appropriate.

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bzrlib/tests/test_transactions.py
 
1
# Copyright (C) 2005, 2006, 2009, 2011 Canonical Ltd
 
2
#   Authors: Robert Collins <robert.collins@canonical.com>
 
3
#
 
4
# This program is free software; you can redistribute it and/or modify
 
5
# it under the terms of the GNU General Public License as published by
 
6
# the Free Software Foundation; either version 2 of the License, or
 
7
# (at your option) any later version.
 
8
#
 
9
# This program is distributed in the hope that it will be useful,
 
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
12
# GNU General Public License for more details.
 
13
#
 
14
# You should have received a copy of the GNU General Public License
 
15
# along with this program; if not, write to the Free Software
 
16
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
17
 
 
18
"""Tests for the behaviour of the Transaction concept in bzr."""
 
19
 
 
20
#import bzrlib specific imports here
 
21
import bzrlib.errors as errors
 
22
from bzrlib.tests import TestCase
 
23
import bzrlib.transactions as transactions
 
24
 
 
25
 
 
26
class DummyWeave(object):
 
27
    """A class that can be instantiated and compared."""
 
28
 
 
29
    def __init__(self, message):
 
30
        self._message = message
 
31
        self.finished = False
 
32
 
 
33
    def __eq__(self, other):
 
34
        if other is None:
 
35
            return False
 
36
        return self._message == other._message
 
37
 
 
38
    def transaction_finished(self):
 
39
        self.finished = True
 
40
 
 
41
 
 
42
class TestSymbols(TestCase):
 
43
 
 
44
    def test_public_symbols(self):
 
45
        from bzrlib.transactions import ReadOnlyTransaction
 
46
        from bzrlib.transactions import PassThroughTransaction
 
47
 
 
48
 
 
49
class TestReadOnlyTransaction(TestCase):
 
50
 
 
51
    def setUp(self):
 
52
        self.transaction = transactions.ReadOnlyTransaction()
 
53
        super(TestReadOnlyTransaction, self).setUp()
 
54
 
 
55
    def test_register_clean(self):
 
56
        self.transaction.register_clean("anobject")
 
57
 
 
58
    def test_register_dirty_raises(self):
 
59
        self.assertRaises(errors.ReadOnlyError,
 
60
                          self.transaction.register_dirty,"anobject")
 
61
 
 
62
    def test_map(self):
 
63
        self.assertNotEqual(None, getattr(self.transaction, "map", None))
 
64
 
 
65
    def test_add_and_get(self):
 
66
        weave = "a weave"
 
67
        self.transaction.map.add_weave("id", weave)
 
68
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
69
 
 
70
    def test_finish_returns(self):
 
71
        self.transaction.finish()
 
72
 
 
73
    def test_finish_does_not_tell_versioned_file_finished(self):
 
74
        # read only transactions never write, so theres no
 
75
        # need to inform versioned files about finishing
 
76
        weave = DummyWeave('a weave')
 
77
        self.transaction.finish()
 
78
        self.assertFalse(weave.finished)
 
79
 
 
80
    def test_zero_size_cache(self):
 
81
        self.transaction.set_cache_size(0)
 
82
        weave = DummyWeave('a weave')
 
83
        self.transaction.map.add_weave("id", weave)
 
84
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
85
        weave = None
 
86
        # add an object, should fall right out if there are no references
 
87
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
88
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
89
        # but if we have a reference it should stick around
 
90
        weave = DummyWeave("another weave")
 
91
        self.transaction.map.add_weave("id", weave)
 
92
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
93
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
94
        del weave
 
95
        # its not a weakref system
 
96
        self.assertEqual(DummyWeave("another weave"),
 
97
                         self.transaction.map.find_weave("id"))
 
98
 
 
99
    def test_small_cache(self):
 
100
        self.transaction.set_cache_size(1)
 
101
        # add an object, should not fall right out if there are no references
 
102
        #sys.getrefcounts(foo)
 
103
        self.transaction.map.add_weave("id", DummyWeave("a weave"))
 
104
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
105
        self.assertEqual(DummyWeave("a weave"),
 
106
                         self.transaction.map.find_weave("id"))
 
107
        self.transaction.map.add_weave("id2", DummyWeave("a weave also"))
 
108
        self.transaction.register_clean(self.transaction.map.find_weave("id2"))
 
109
        # currently a fifo
 
110
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
111
        self.assertEqual(DummyWeave("a weave also"),
 
112
                         self.transaction.map.find_weave("id2"))
 
113
 
 
114
    def test_small_cache_with_references(self):
 
115
        # if we have a reference it should stick around
 
116
        weave = "a weave"
 
117
        weave2 = "another weave"
 
118
        self.transaction.map.add_weave("id", weave)
 
119
        self.transaction.map.add_weave("id2", weave2)
 
120
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
121
        self.assertEqual(weave2, self.transaction.map.find_weave("id2"))
 
122
        weave = None
 
123
        # its not a weakref system
 
124
        self.assertEqual("a weave", self.transaction.map.find_weave("id"))
 
125
 
 
126
    def test_precious_with_zero_size_cache(self):
 
127
        self.transaction.set_cache_size(0)
 
128
        weave = DummyWeave('a weave')
 
129
        self.transaction.map.add_weave("id", weave)
 
130
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
131
        weave = None
 
132
        # add an object, should not fall out even with no references.
 
133
        self.transaction.register_clean(self.transaction.map.find_weave("id"),
 
134
                                        precious=True)
 
135
        self.assertEqual(DummyWeave('a weave'),
 
136
                         self.transaction.map.find_weave("id"))
 
137
 
 
138
    def test_writable(self):
 
139
        self.assertFalse(self.transaction.writeable())
 
140
 
 
141
 
 
142
class TestPassThroughTransaction(TestCase):
 
143
 
 
144
    def test_construct(self):
 
145
        transactions.PassThroughTransaction()
 
146
 
 
147
    def test_register_clean(self):
 
148
        transaction = transactions.PassThroughTransaction()
 
149
        transaction.register_clean("anobject")
 
150
 
 
151
    def test_register_dirty(self):
 
152
        transaction = transactions.PassThroughTransaction()
 
153
        transaction.register_dirty("anobject")
 
154
 
 
155
    def test_map(self):
 
156
        transaction = transactions.PassThroughTransaction()
 
157
        self.assertNotEqual(None, getattr(transaction, "map", None))
 
158
 
 
159
    def test_add_and_get(self):
 
160
        transaction = transactions.PassThroughTransaction()
 
161
        weave = "a weave"
 
162
        transaction.map.add_weave("id", weave)
 
163
        self.assertEqual(None, transaction.map.find_weave("id"))
 
164
 
 
165
    def test_finish_returns(self):
 
166
        transaction = transactions.PassThroughTransaction()
 
167
        transaction.finish()
 
168
 
 
169
    def test_finish_tells_versioned_file_finished(self):
 
170
        # pass through transactions allow writes so they
 
171
        # need to inform versioned files about finishing
 
172
        weave = DummyWeave('a weave')
 
173
        transaction = transactions.PassThroughTransaction()
 
174
        transaction.register_dirty(weave)
 
175
        transaction.finish()
 
176
        self.assertTrue(weave.finished)
 
177
 
 
178
    def test_cache_is_ignored(self):
 
179
        transaction = transactions.PassThroughTransaction()
 
180
        transaction.set_cache_size(100)
 
181
        weave = "a weave"
 
182
        transaction.map.add_weave("id", weave)
 
183
        self.assertEqual(None, transaction.map.find_weave("id"))
 
184
 
 
185
    def test_writable(self):
 
186
        transaction = transactions.PassThroughTransaction()
 
187
        self.assertTrue(transaction.writeable())
 
188
 
 
189
 
 
190
class TestWriteTransaction(TestCase):
 
191
 
 
192
    def setUp(self):
 
193
        self.transaction = transactions.WriteTransaction()
 
194
        super(TestWriteTransaction, self).setUp()
 
195
 
 
196
    def test_register_clean(self):
 
197
        self.transaction.register_clean("anobject")
 
198
 
 
199
    def test_register_dirty(self):
 
200
        self.transaction.register_dirty("anobject")
 
201
 
 
202
    def test_map(self):
 
203
        self.assertNotEqual(None, getattr(self.transaction, "map", None))
 
204
 
 
205
    def test_add_and_get(self):
 
206
        weave = "a weave"
 
207
        self.transaction.map.add_weave("id", weave)
 
208
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
209
 
 
210
    def test_finish_returns(self):
 
211
        self.transaction.finish()
 
212
 
 
213
    def test_finish_tells_versioned_file_finished(self):
 
214
        # write transactions allow writes so they
 
215
        # need to inform versioned files about finishing
 
216
        weave = DummyWeave('a weave')
 
217
        self.transaction.register_dirty(weave)
 
218
        self.transaction.finish()
 
219
        self.assertTrue(weave.finished)
 
220
 
 
221
    def test_zero_size_cache(self):
 
222
        self.transaction.set_cache_size(0)
 
223
        # add an object, should fall right out if there are no references
 
224
        weave = DummyWeave('a weave')
 
225
        self.transaction.map.add_weave("id", weave)
 
226
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
227
        weave = None
 
228
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
229
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
230
        # but if we have a reference to a clean object it should stick around
 
231
        weave = DummyWeave("another weave")
 
232
        self.transaction.map.add_weave("id", weave)
 
233
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
234
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
235
        del weave
 
236
        # its not a weakref system
 
237
        self.assertEqual(DummyWeave("another weave"),
 
238
                         self.transaction.map.find_weave("id"))
 
239
 
 
240
    def test_zero_size_cache_dirty_objects(self):
 
241
        self.transaction.set_cache_size(0)
 
242
        # add a dirty object, which should not fall right out.
 
243
        weave = DummyWeave('a weave')
 
244
        self.transaction.map.add_weave("id", weave)
 
245
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
246
        weave = None
 
247
        self.transaction.register_dirty(self.transaction.map.find_weave("id"))
 
248
        self.assertNotEqual(None, self.transaction.map.find_weave("id"))
 
249
 
 
250
    def test_clean_to_dirty(self):
 
251
        # a clean object may become dirty.
 
252
        weave = DummyWeave('A weave')
 
253
        self.transaction.map.add_weave("id", weave)
 
254
        self.transaction.register_clean(weave)
 
255
        self.transaction.register_dirty(weave)
 
256
        self.assertTrue(self.transaction.is_dirty(weave))
 
257
        self.assertFalse(self.transaction.is_clean(weave))
 
258
 
 
259
    def test_small_cache(self):
 
260
        self.transaction.set_cache_size(1)
 
261
        # add an object, should not fall right out if there are no references
 
262
        #sys.getrefcounts(foo)
 
263
        self.transaction.map.add_weave("id", DummyWeave("a weave"))
 
264
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
265
        self.assertEqual(DummyWeave("a weave"),
 
266
                         self.transaction.map.find_weave("id"))
 
267
        self.transaction.map.add_weave("id2", DummyWeave("a weave also"))
 
268
        self.transaction.register_clean(self.transaction.map.find_weave("id2"))
 
269
        # currently a fifo
 
270
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
271
        self.assertEqual(DummyWeave("a weave also"),
 
272
                         self.transaction.map.find_weave("id2"))
 
273
 
 
274
    def test_small_cache_with_references(self):
 
275
        # if we have a reference it should stick around
 
276
        weave = "a weave"
 
277
        weave2 = "another weave"
 
278
        self.transaction.map.add_weave("id", weave)
 
279
        self.transaction.map.add_weave("id2", weave2)
 
280
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
281
        self.assertEqual(weave2, self.transaction.map.find_weave("id2"))
 
282
        weave = None
 
283
        # its not a weakref system
 
284
        self.assertEqual("a weave", self.transaction.map.find_weave("id"))
 
285
 
 
286
    def test_precious_with_zero_size_cache(self):
 
287
        self.transaction.set_cache_size(0)
 
288
        weave = DummyWeave('a weave')
 
289
        self.transaction.map.add_weave("id", weave)
 
290
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
291
        weave = None
 
292
        # add an object, should not fall out even with no references.
 
293
        self.transaction.register_clean(self.transaction.map.find_weave("id"),
 
294
                                        precious=True)
 
295
        self.assertEqual(DummyWeave('a weave'),
 
296
                         self.transaction.map.find_weave("id"))
 
297
 
 
298
    def test_writable(self):
 
299
        self.assertTrue(self.transaction.writeable())