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  • Committer: Jelmer Vernooij
  • Date: 2020-03-22 01:35:14 UTC
  • mfrom: (7490.7.6 work)
  • mto: This revision was merged to the branch mainline in revision 7499.
  • Revision ID: jelmer@jelmer.uk-20200322013514-7vw1ntwho04rcuj3
merge lp:brz/3.1.

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breezy/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 breezy specific imports here
 
21
import breezy.errors as errors
 
22
from breezy.tests import TestCase
 
23
import breezy.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 __hash__(self):
 
39
        return hash((type(self), self._message))
 
40
 
 
41
    def transaction_finished(self):
 
42
        self.finished = True
 
43
 
 
44
 
 
45
class TestSymbols(TestCase):
 
46
 
 
47
    def test_public_symbols(self):
 
48
        from breezy.transactions import ReadOnlyTransaction  # noqa: F401
 
49
        from breezy.transactions import PassThroughTransaction  # noqa: F401
 
50
 
 
51
 
 
52
class TestReadOnlyTransaction(TestCase):
 
53
 
 
54
    def setUp(self):
 
55
        self.transaction = transactions.ReadOnlyTransaction()
 
56
        super(TestReadOnlyTransaction, self).setUp()
 
57
 
 
58
    def test_register_clean(self):
 
59
        self.transaction.register_clean("anobject")
 
60
 
 
61
    def test_register_dirty_raises(self):
 
62
        self.assertRaises(errors.ReadOnlyError,
 
63
                          self.transaction.register_dirty, "anobject")
 
64
 
 
65
    def test_map(self):
 
66
        self.assertNotEqual(None, getattr(self.transaction, "map", None))
 
67
 
 
68
    def test_add_and_get(self):
 
69
        weave = "a weave"
 
70
        self.transaction.map.add_weave("id", weave)
 
71
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
72
 
 
73
    def test_finish_returns(self):
 
74
        self.transaction.finish()
 
75
 
 
76
    def test_finish_does_not_tell_versioned_file_finished(self):
 
77
        # read only transactions never write, so theres no
 
78
        # need to inform versioned files about finishing
 
79
        weave = DummyWeave('a weave')
 
80
        self.transaction.finish()
 
81
        self.assertFalse(weave.finished)
 
82
 
 
83
    def test_zero_size_cache(self):
 
84
        self.transaction.set_cache_size(0)
 
85
        weave = DummyWeave('a weave')
 
86
        self.transaction.map.add_weave("id", weave)
 
87
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
88
        weave = None
 
89
        # add an object, should fall right out if there are no references
 
90
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
91
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
92
        # but if we have a reference it should stick around
 
93
        weave = DummyWeave("another weave")
 
94
        self.transaction.map.add_weave("id", weave)
 
95
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
96
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
97
        del weave
 
98
        # its not a weakref system
 
99
        self.assertEqual(DummyWeave("another weave"),
 
100
                         self.transaction.map.find_weave("id"))
 
101
 
 
102
    def test_small_cache(self):
 
103
        self.transaction.set_cache_size(1)
 
104
        # add an object, should not fall right out if there are no references
 
105
        # sys.getrefcounts(foo)
 
106
        self.transaction.map.add_weave("id", DummyWeave("a weave"))
 
107
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
108
        self.assertEqual(DummyWeave("a weave"),
 
109
                         self.transaction.map.find_weave("id"))
 
110
        self.transaction.map.add_weave("id2", DummyWeave("a weave also"))
 
111
        self.transaction.register_clean(self.transaction.map.find_weave("id2"))
 
112
        # currently a fifo
 
113
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
114
        self.assertEqual(DummyWeave("a weave also"),
 
115
                         self.transaction.map.find_weave("id2"))
 
116
 
 
117
    def test_small_cache_with_references(self):
 
118
        # if we have a reference it should stick around
 
119
        weave = "a weave"
 
120
        weave2 = "another weave"
 
121
        self.transaction.map.add_weave("id", weave)
 
122
        self.transaction.map.add_weave("id2", weave2)
 
123
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
124
        self.assertEqual(weave2, self.transaction.map.find_weave("id2"))
 
125
        weave = None
 
126
        # its not a weakref system
 
127
        self.assertEqual("a weave", self.transaction.map.find_weave("id"))
 
128
 
 
129
    def test_precious_with_zero_size_cache(self):
 
130
        self.transaction.set_cache_size(0)
 
131
        weave = DummyWeave('a weave')
 
132
        self.transaction.map.add_weave("id", weave)
 
133
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
134
        weave = None
 
135
        # add an object, should not fall out even with no references.
 
136
        self.transaction.register_clean(self.transaction.map.find_weave("id"),
 
137
                                        precious=True)
 
138
        self.assertEqual(DummyWeave('a weave'),
 
139
                         self.transaction.map.find_weave("id"))
 
140
 
 
141
    def test_writable(self):
 
142
        self.assertFalse(self.transaction.writeable())
 
143
 
 
144
 
 
145
class TestPassThroughTransaction(TestCase):
 
146
 
 
147
    def test_construct(self):
 
148
        transactions.PassThroughTransaction()
 
149
 
 
150
    def test_register_clean(self):
 
151
        transaction = transactions.PassThroughTransaction()
 
152
        transaction.register_clean("anobject")
 
153
 
 
154
    def test_register_dirty(self):
 
155
        transaction = transactions.PassThroughTransaction()
 
156
        transaction.register_dirty("anobject")
 
157
 
 
158
    def test_map(self):
 
159
        transaction = transactions.PassThroughTransaction()
 
160
        self.assertNotEqual(None, getattr(transaction, "map", None))
 
161
 
 
162
    def test_add_and_get(self):
 
163
        transaction = transactions.PassThroughTransaction()
 
164
        weave = "a weave"
 
165
        transaction.map.add_weave("id", weave)
 
166
        self.assertEqual(None, transaction.map.find_weave("id"))
 
167
 
 
168
    def test_finish_returns(self):
 
169
        transaction = transactions.PassThroughTransaction()
 
170
        transaction.finish()
 
171
 
 
172
    def test_finish_tells_versioned_file_finished(self):
 
173
        # pass through transactions allow writes so they
 
174
        # need to inform versioned files about finishing
 
175
        weave = DummyWeave('a weave')
 
176
        transaction = transactions.PassThroughTransaction()
 
177
        transaction.register_dirty(weave)
 
178
        transaction.finish()
 
179
        self.assertTrue(weave.finished)
 
180
 
 
181
    def test_cache_is_ignored(self):
 
182
        transaction = transactions.PassThroughTransaction()
 
183
        transaction.set_cache_size(100)
 
184
        weave = "a weave"
 
185
        transaction.map.add_weave("id", weave)
 
186
        self.assertEqual(None, transaction.map.find_weave("id"))
 
187
 
 
188
    def test_writable(self):
 
189
        transaction = transactions.PassThroughTransaction()
 
190
        self.assertTrue(transaction.writeable())
 
191
 
 
192
 
 
193
class TestWriteTransaction(TestCase):
 
194
 
 
195
    def setUp(self):
 
196
        self.transaction = transactions.WriteTransaction()
 
197
        super(TestWriteTransaction, self).setUp()
 
198
 
 
199
    def test_register_clean(self):
 
200
        self.transaction.register_clean("anobject")
 
201
 
 
202
    def test_register_dirty(self):
 
203
        self.transaction.register_dirty("anobject")
 
204
 
 
205
    def test_map(self):
 
206
        self.assertNotEqual(None, getattr(self.transaction, "map", None))
 
207
 
 
208
    def test_add_and_get(self):
 
209
        weave = "a weave"
 
210
        self.transaction.map.add_weave("id", weave)
 
211
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
212
 
 
213
    def test_finish_returns(self):
 
214
        self.transaction.finish()
 
215
 
 
216
    def test_finish_tells_versioned_file_finished(self):
 
217
        # write transactions allow writes so they
 
218
        # need to inform versioned files about finishing
 
219
        weave = DummyWeave('a weave')
 
220
        self.transaction.register_dirty(weave)
 
221
        self.transaction.finish()
 
222
        self.assertTrue(weave.finished)
 
223
 
 
224
    def test_zero_size_cache(self):
 
225
        self.transaction.set_cache_size(0)
 
226
        # add an object, should fall right out if there are no references
 
227
        weave = DummyWeave('a weave')
 
228
        self.transaction.map.add_weave("id", weave)
 
229
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
230
        weave = None
 
231
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
232
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
233
        # but if we have a reference to a clean object it should stick around
 
234
        weave = DummyWeave("another weave")
 
235
        self.transaction.map.add_weave("id", weave)
 
236
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
237
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
238
        del weave
 
239
        # its not a weakref system
 
240
        self.assertEqual(DummyWeave("another weave"),
 
241
                         self.transaction.map.find_weave("id"))
 
242
 
 
243
    def test_zero_size_cache_dirty_objects(self):
 
244
        self.transaction.set_cache_size(0)
 
245
        # add a dirty object, which should not fall right out.
 
246
        weave = DummyWeave('a weave')
 
247
        self.transaction.map.add_weave("id", weave)
 
248
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
249
        weave = None
 
250
        self.transaction.register_dirty(self.transaction.map.find_weave("id"))
 
251
        self.assertNotEqual(None, self.transaction.map.find_weave("id"))
 
252
 
 
253
    def test_clean_to_dirty(self):
 
254
        # a clean object may become dirty.
 
255
        weave = DummyWeave('A weave')
 
256
        self.transaction.map.add_weave("id", weave)
 
257
        self.transaction.register_clean(weave)
 
258
        self.transaction.register_dirty(weave)
 
259
        self.assertTrue(self.transaction.is_dirty(weave))
 
260
        self.assertFalse(self.transaction.is_clean(weave))
 
261
 
 
262
    def test_small_cache(self):
 
263
        self.transaction.set_cache_size(1)
 
264
        # add an object, should not fall right out if there are no references
 
265
        # sys.getrefcounts(foo)
 
266
        self.transaction.map.add_weave("id", DummyWeave("a weave"))
 
267
        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
268
        self.assertEqual(DummyWeave("a weave"),
 
269
                         self.transaction.map.find_weave("id"))
 
270
        self.transaction.map.add_weave("id2", DummyWeave("a weave also"))
 
271
        self.transaction.register_clean(self.transaction.map.find_weave("id2"))
 
272
        # currently a fifo
 
273
        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
274
        self.assertEqual(DummyWeave("a weave also"),
 
275
                         self.transaction.map.find_weave("id2"))
 
276
 
 
277
    def test_small_cache_with_references(self):
 
278
        # if we have a reference it should stick around
 
279
        weave = "a weave"
 
280
        weave2 = "another weave"
 
281
        self.transaction.map.add_weave("id", weave)
 
282
        self.transaction.map.add_weave("id2", weave2)
 
283
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
284
        self.assertEqual(weave2, self.transaction.map.find_weave("id2"))
 
285
        weave = None
 
286
        # its not a weakref system
 
287
        self.assertEqual("a weave", self.transaction.map.find_weave("id"))
 
288
 
 
289
    def test_precious_with_zero_size_cache(self):
 
290
        self.transaction.set_cache_size(0)
 
291
        weave = DummyWeave('a weave')
 
292
        self.transaction.map.add_weave("id", weave)
 
293
        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
294
        weave = None
 
295
        # add an object, should not fall out even with no references.
 
296
        self.transaction.register_clean(self.transaction.map.find_weave("id"),
 
297
                                        precious=True)
 
298
        self.assertEqual(DummyWeave('a weave'),
 
299
                         self.transaction.map.find_weave("id"))
 
300
 
 
301
    def test_writable(self):
 
302
        self.assertTrue(self.transaction.writeable())