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bzrlib/tests/test_transactions.py
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# Copyright (C) 2005 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
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# 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())