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Viewing changes to bzrlib/tests/test_transactions.py

  • Committer: John Arbash Meinel
  • Date: 2006-07-09 15:47:02 UTC
  • mto: This revision was merged to the branch mainline in revision 1846.
  • Revision ID: john@arbash-meinel.com-20060709154702-304436a47a55e265
Renaming LockHelpers.py to lock_helpers.py

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bzrlib/tests/test_transactions.py
 
1
# Copyright (C) 2005 by 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
17
 
 
18
"""Tests for the behaviour of the Transaction concept in bzr."""
 
19
 
 
20
# import system imports here
 
21
import os
 
22
import sys
 
23
 
 
24
#import bzrlib specific imports here
 
25
import bzrlib.errors as errors
 
26
from bzrlib.tests import TestCase, TestCaseInTempDir
 
27
import bzrlib.transactions as transactions
 
28
 
 
29
 
 
30
class DummyWeave(object):
 
31
    """A class that can be instantiated and compared."""
 
32
 
 
33
    def __init__(self, message):
 
34
        self._message = message
 
35
        self.finished = False
 
36
 
 
37
    def __eq__(self, other):
 
38
        if other is None:
 
39
            return False
 
40
        return self._message == other._message
 
41
 
 
42
    def transaction_finished(self):
 
43
        self.finished = True
 
44
 
 
45
 
 
46
class TestSymbols(TestCase):
 
47
 
 
48
    def test_public_symbols(self):
 
49
        from bzrlib.transactions import ReadOnlyTransaction
 
50
        from bzrlib.transactions import PassThroughTransaction
 
51
 
 
52
 
 
53
class TestReadOnlyTransaction(TestCase):
 
54
 
 
55
    def setUp(self):
 
56
        self.transaction = transactions.ReadOnlyTransaction()
 
57
        super(TestReadOnlyTransaction, self).setUp()
 
58
 
 
59
    def test_register_clean(self):
 
60
        self.transaction.register_clean("anobject")
 
61
 
 
62
    def test_register_dirty_raises(self):
 
63
        self.assertRaises(errors.ReadOnlyError, 
 
64
                          self.transaction.register_dirty,"anobject")
 
65
    
 
66
    def test_map(self):
 
67
        self.assertNotEqual(None, getattr(self.transaction, "map", None))
 
68
    
 
69
    def test_add_and_get(self):
 
70
        weave = "a weave"
 
71
        self.transaction.map.add_weave("id", weave)
 
72
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
73
 
 
74
    def test_finish_returns(self):
 
75
        self.transaction.finish()
 
76
 
 
77
    def test_finish_does_not_tell_versioned_file_finished(self):
 
78
        # read only transactions never write, so theres no
 
79
        # need to inform versioned files about finishing
 
80
        weave = DummyWeave('a weave')
 
81
        self.transaction.finish()
 
82
        self.assertFalse(weave.finished)
 
83
 
 
84
    def test_zero_size_cache(self):
 
85
        self.transaction.set_cache_size(0)
 
86
        weave = DummyWeave('a weave')
 
87
        self.transaction.map.add_weave("id", weave)
 
88
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
89
        weave = None
 
90
        # add an object, should fall right out if there are no references
 
91
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
92
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
93
        # but if we have a reference it should stick around
 
94
        weave = DummyWeave("another weave")
 
95
        self.transaction.map.add_weave("id", weave)
 
96
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
97
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
98
        del weave
 
99
        # its not a weakref system
 
100
        self.assertEqual(DummyWeave("another weave"),
 
101
                         self.transaction.map.find_weave("id"))
 
102
        
 
103
    def test_small_cache(self):
 
104
        self.transaction.set_cache_size(1)
 
105
        # add an object, should not fall right out if there are no references
 
106
        #sys.getrefcounts(foo)
 
107
        self.transaction.map.add_weave("id", DummyWeave("a weave"))
 
108
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
109
        self.assertEqual(DummyWeave("a weave"),
 
110
                         self.transaction.map.find_weave("id"))
 
111
        self.transaction.map.add_weave("id2", DummyWeave("a weave also"))
 
112
        self.transaction.register_clean(self.transaction.map.find_weave("id2"))
 
113
        # currently a fifo
 
114
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
115
        self.assertEqual(DummyWeave("a weave also"),
 
116
                         self.transaction.map.find_weave("id2"))
 
117
 
 
118
    def test_small_cache_with_references(self):
 
119
        # if we have a reference it should stick around
 
120
        weave = "a weave"
 
121
        weave2 = "another weave"
 
122
        self.transaction.map.add_weave("id", weave)
 
123
        self.transaction.map.add_weave("id2", weave2)
 
124
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
125
        self.assertEqual(weave2, self.transaction.map.find_weave("id2"))
 
126
        weave = None
 
127
        # its not a weakref system
 
128
        self.assertEqual("a weave", self.transaction.map.find_weave("id"))
 
129
 
 
130
    def test_precious_with_zero_size_cache(self):
 
131
        self.transaction.set_cache_size(0)
 
132
        weave = DummyWeave('a weave')
 
133
        self.transaction.map.add_weave("id", weave)
 
134
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
135
        weave = None
 
136
        # add an object, should not fall out even with no references.
 
137
        self.transaction.register_clean(self.transaction.map.find_weave("id"),
 
138
                                        precious=True)
 
139
        self.assertEqual(DummyWeave('a weave'),
 
140
                         self.transaction.map.find_weave("id"))
 
141
 
 
142
    def test_writable(self):
 
143
        self.assertFalse(self.transaction.writeable())
 
144
 
 
145
 
 
146
class TestPassThroughTransaction(TestCase):
 
147
 
 
148
    def test_construct(self):
 
149
        transactions.PassThroughTransaction()
 
150
 
 
151
    def test_register_clean(self):
 
152
        transaction = transactions.PassThroughTransaction()
 
153
        transaction.register_clean("anobject")
 
154
    
 
155
    def test_register_dirty(self):
 
156
        transaction = transactions.PassThroughTransaction()
 
157
        transaction.register_dirty("anobject")
 
158
    
 
159
    def test_map(self):
 
160
        transaction = transactions.PassThroughTransaction()
 
161
        self.assertNotEqual(None, getattr(transaction, "map", None))
 
162
    
 
163
    def test_add_and_get(self):
 
164
        transaction = transactions.PassThroughTransaction()
 
165
        weave = "a weave"
 
166
        transaction.map.add_weave("id", weave)
 
167
        self.assertEqual(None, transaction.map.find_weave("id"))
 
168
        
 
169
    def test_finish_returns(self):
 
170
        transaction = transactions.PassThroughTransaction()
 
171
        transaction.finish()
 
172
 
 
173
    def test_finish_tells_versioned_file_finished(self):
 
174
        # pass through transactions allow writes so they
 
175
        # need to inform versioned files about finishing
 
176
        weave = DummyWeave('a weave')
 
177
        transaction = transactions.PassThroughTransaction()
 
178
        transaction.register_dirty(weave)
 
179
        transaction.finish()
 
180
        self.assertTrue(weave.finished)
 
181
 
 
182
    def test_cache_is_ignored(self):
 
183
        transaction = transactions.PassThroughTransaction()
 
184
        transaction.set_cache_size(100)
 
185
        weave = "a weave"
 
186
        transaction.map.add_weave("id", weave)
 
187
        self.assertEqual(None, transaction.map.find_weave("id"))
 
188
 
 
189
    def test_writable(self):
 
190
        transaction = transactions.PassThroughTransaction()
 
191
        self.assertTrue(transaction.writeable())
 
192
        
 
193
 
 
194
class TestWriteTransaction(TestCase):
 
195
 
 
196
    def setUp(self):
 
197
        self.transaction = transactions.WriteTransaction()
 
198
        super(TestWriteTransaction, self).setUp()
 
199
 
 
200
    def test_register_clean(self):
 
201
        self.transaction.register_clean("anobject")
 
202
    
 
203
    def test_register_dirty(self):
 
204
        self.transaction.register_dirty("anobject")
 
205
    
 
206
    def test_map(self):
 
207
        self.assertNotEqual(None, getattr(self.transaction, "map", None))
 
208
    
 
209
    def test_add_and_get(self):
 
210
        weave = "a weave"
 
211
        self.transaction.map.add_weave("id", weave)
 
212
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
213
        
 
214
    def test_finish_returns(self):
 
215
        self.transaction.finish()
 
216
 
 
217
    def test_finish_tells_versioned_file_finished(self):
 
218
        # write transactions allow writes so they
 
219
        # need to inform versioned files about finishing
 
220
        weave = DummyWeave('a weave')
 
221
        self.transaction.register_dirty(weave)
 
222
        self.transaction.finish()
 
223
        self.assertTrue(weave.finished)
 
224
 
 
225
    def test_zero_size_cache(self):
 
226
        self.transaction.set_cache_size(0)
 
227
        # add an object, should fall right out if there are no references
 
228
        weave = DummyWeave('a weave')
 
229
        self.transaction.map.add_weave("id", weave)
 
230
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
231
        weave = None
 
232
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
233
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
234
        # but if we have a reference to a clean object it should stick around
 
235
        weave = DummyWeave("another weave")
 
236
        self.transaction.map.add_weave("id", weave)
 
237
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
238
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
239
        del weave
 
240
        # its not a weakref system
 
241
        self.assertEqual(DummyWeave("another weave"),
 
242
                         self.transaction.map.find_weave("id"))
 
243
 
 
244
    def test_zero_size_cache_dirty_objects(self):
 
245
        self.transaction.set_cache_size(0)
 
246
        # add a dirty object, which should not fall right out.
 
247
        weave = DummyWeave('a weave')
 
248
        self.transaction.map.add_weave("id", weave)
 
249
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
250
        weave = None
 
251
        self.transaction.register_dirty(self.transaction.map.find_weave("id"))
 
252
        self.assertNotEqual(None, self.transaction.map.find_weave("id"))
 
253
    
 
254
    def test_clean_to_dirty(self):
 
255
        # a clean object may become dirty.
 
256
        weave = DummyWeave('A weave')
 
257
        self.transaction.map.add_weave("id", weave)
 
258
        self.transaction.register_clean(weave)
 
259
        self.transaction.register_dirty(weave)
 
260
        self.assertTrue(self.transaction.is_dirty(weave))
 
261
        self.assertFalse(self.transaction.is_clean(weave))
 
262
 
 
263
    def test_small_cache(self):
 
264
        self.transaction.set_cache_size(1)
 
265
        # add an object, should not fall right out if there are no references
 
266
        #sys.getrefcounts(foo)
 
267
        self.transaction.map.add_weave("id", DummyWeave("a weave"))
 
268
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
269
        self.assertEqual(DummyWeave("a weave"),
 
270
                         self.transaction.map.find_weave("id"))
 
271
        self.transaction.map.add_weave("id2", DummyWeave("a weave also"))
 
272
        self.transaction.register_clean(self.transaction.map.find_weave("id2"))
 
273
        # currently a fifo
 
274
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
275
        self.assertEqual(DummyWeave("a weave also"),
 
276
                         self.transaction.map.find_weave("id2"))
 
277
 
 
278
    def test_small_cache_with_references(self):
 
279
        # if we have a reference it should stick around
 
280
        weave = "a weave"
 
281
        weave2 = "another weave"
 
282
        self.transaction.map.add_weave("id", weave)
 
283
        self.transaction.map.add_weave("id2", weave2)
 
284
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
285
        self.assertEqual(weave2, self.transaction.map.find_weave("id2"))
 
286
        weave = None
 
287
        # its not a weakref system
 
288
        self.assertEqual("a weave", self.transaction.map.find_weave("id"))
 
289
 
 
290
    def test_precious_with_zero_size_cache(self):
 
291
        self.transaction.set_cache_size(0)
 
292
        weave = DummyWeave('a weave')
 
293
        self.transaction.map.add_weave("id", weave)
 
294
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
295
        weave = None
 
296
        # add an object, should not fall out even with no references.
 
297
        self.transaction.register_clean(self.transaction.map.find_weave("id"),
 
298
                                        precious=True)
 
299
        self.assertEqual(DummyWeave('a weave'),
 
300
                         self.transaction.map.find_weave("id"))
 
301
 
 
302
    def test_writable(self):
 
303
        self.assertTrue(self.transaction.writeable())