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Viewing changes to bzrlib/tests/test_lockable_files.py

  • Committer: Mark Hammond
  • Date: 2009-01-12 01:55:34 UTC
  • mto: (3995.8.2 prepare-1.12)
  • mto: This revision was merged to the branch mainline in revision 4007.
  • Revision ID: mhammond@skippinet.com.au-20090112015534-yfxg50p7mpds9j4v
Include all .html files from the tortoise doc directory.

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bzrlib/tests/test_lockable_files.py
1
 
# Copyright (C) 2005, 2006, 2008, 2009 Canonical Ltd
 
1
# Copyright (C) 2005, 2006, 2008 Canonical Ltd
2
2
#
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
12
12
#
13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
 
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16
16
 
17
17
from StringIO import StringIO
18
18
 
46
46
# so won't modernize them now. - mbp 20080430
47
47
class _TestLockableFiles_mixin(object):
48
48
 
 
49
    def test_read_write(self):
 
50
        self.assertRaises(NoSuchFile,
 
51
            self.applyDeprecated,
 
52
            deprecated_in((1, 5, 0)),
 
53
            self.lockable.get, 'foo')
 
54
        self.assertRaises(NoSuchFile,
 
55
            self.applyDeprecated,
 
56
            deprecated_in((1, 5, 0)),
 
57
            self.lockable.get_utf8, 'foo')
 
58
        self.lockable.lock_write()
 
59
        try:
 
60
            unicode_string = u'bar\u1234'
 
61
            self.assertEqual(4, len(unicode_string))
 
62
            byte_string = unicode_string.encode('utf-8')
 
63
            self.assertEqual(6, len(byte_string))
 
64
            self.assertRaises(UnicodeEncodeError,
 
65
                self.applyDeprecated,
 
66
                deprecated_in((1, 6, 0)),
 
67
                self.lockable.put, 'foo',
 
68
                StringIO(unicode_string))
 
69
            self.applyDeprecated(
 
70
                deprecated_in((1, 6, 0)),
 
71
                self.lockable.put,
 
72
                'foo', StringIO(byte_string))
 
73
            byte_stream = self.applyDeprecated(
 
74
                deprecated_in((1, 5, 0)),
 
75
                self.lockable.get,
 
76
                'foo')
 
77
            self.assertEqual(byte_string, byte_stream.read())
 
78
            unicode_stream = self.applyDeprecated(
 
79
                deprecated_in((1, 5, 0)),
 
80
                self.lockable.get_utf8,
 
81
                'foo')
 
82
            self.assertEqual(unicode_string,
 
83
                unicode_stream.read())
 
84
            self.assertRaises(BzrBadParameterNotString,
 
85
                self.applyDeprecated,
 
86
                deprecated_in((1, 6, 0)),
 
87
                self.lockable.put_utf8,
 
88
                'bar',
 
89
                StringIO(unicode_string))
 
90
            self.applyDeprecated(
 
91
                deprecated_in((1, 6, 0)),
 
92
                self.lockable.put_utf8,
 
93
                'bar',
 
94
                unicode_string)
 
95
            unicode_stream = self.applyDeprecated(
 
96
                deprecated_in((1, 5, 0)),
 
97
                self.lockable.get_utf8,
 
98
                'bar')
 
99
            self.assertEqual(unicode_string,
 
100
                unicode_stream.read())
 
101
            byte_stream = self.applyDeprecated(
 
102
                deprecated_in((1, 5, 0)),
 
103
                self.lockable.get,
 
104
                'bar')
 
105
            self.assertEqual(byte_string, byte_stream.read())
 
106
            self.applyDeprecated(
 
107
                deprecated_in((1, 6, 0)),
 
108
                self.lockable.put_bytes,
 
109
                'raw', 'raw\xffbytes')
 
110
            byte_stream = self.applyDeprecated(
 
111
                deprecated_in((1, 5, 0)),
 
112
                self.lockable.get,
 
113
                'raw')
 
114
            self.assertEqual('raw\xffbytes', byte_stream.read())
 
115
        finally:
 
116
            self.lockable.unlock()
 
117
 
 
118
    def test_locks(self):
 
119
        self.lockable.lock_read()
 
120
        try:
 
121
            self.assertRaises(ReadOnlyError, self.lockable.put, 'foo',
 
122
                              StringIO('bar\u1234'))
 
123
        finally:
 
124
            self.lockable.unlock()
 
125
 
49
126
    def test_transactions(self):
50
127
        self.assertIs(self.lockable.get_transaction().__class__,
51
128
                      PassThroughTransaction)
68
145
 
69
146
    def test__escape(self):
70
147
        self.assertEqual('%25', self.lockable._escape('%'))
71
 
 
 
148
        
72
149
    def test__escape_empty(self):
73
150
        self.assertEqual('', self.lockable._escape(''))
74
151
 
84
161
        l2 = self.get_lockable()
85
162
        orig_factory = bzrlib.ui.ui_factory
86
163
        # silent ui - no need for stdout
87
 
        bzrlib.ui.ui_factory = bzrlib.ui.CannedInputUIFactory([True])
 
164
        bzrlib.ui.ui_factory = bzrlib.ui.SilentUIFactory()
 
165
        bzrlib.ui.ui_factory.stdin = StringIO("y\n")
88
166
        try:
89
167
            l2.break_lock()
90
168
        finally:
98
176
 
99
177
    def test_lock_write_returns_None_refuses_token(self):
100
178
        token = self.lockable.lock_write()
101
 
        self.addCleanup(self.lockable.unlock)
102
 
        if token is not None:
103
 
            # This test does not apply, because this lockable supports
104
 
            # tokens.
105
 
            raise TestNotApplicable("%r uses tokens" % (self.lockable,))
106
 
        self.assertRaises(errors.TokenLockingNotSupported,
107
 
                          self.lockable.lock_write, token='token')
 
179
        try:
 
180
            if token is not None:
 
181
                # This test does not apply, because this lockable supports
 
182
                # tokens.
 
183
                raise TestNotApplicable("%r uses tokens" % (self.lockable,))
 
184
            self.assertRaises(errors.TokenLockingNotSupported,
 
185
                              self.lockable.lock_write, token='token')
 
186
        finally:
 
187
            self.lockable.unlock()
108
188
 
109
189
    def test_lock_write_returns_token_when_given_token(self):
110
190
        token = self.lockable.lock_write()
111
 
        self.addCleanup(self.lockable.unlock)
112
 
        if token is None:
113
 
            # This test does not apply, because this lockable refuses
114
 
            # tokens.
115
 
            return
116
 
        new_lockable = self.get_lockable()
117
 
        token_from_new_lockable = new_lockable.lock_write(token=token)
118
 
        self.addCleanup(new_lockable.unlock)
119
 
        self.assertEqual(token, token_from_new_lockable)
 
191
        try:
 
192
            if token is None:
 
193
                # This test does not apply, because this lockable refuses
 
194
                # tokens.
 
195
                return
 
196
            new_lockable = self.get_lockable()
 
197
            token_from_new_lockable = new_lockable.lock_write(token=token)
 
198
            try:
 
199
                self.assertEqual(token, token_from_new_lockable)
 
200
            finally:
 
201
                new_lockable.unlock()
 
202
        finally:
 
203
            self.lockable.unlock()
120
204
 
121
205
    def test_lock_write_raises_on_token_mismatch(self):
122
206
        token = self.lockable.lock_write()
123
 
        self.addCleanup(self.lockable.unlock)
124
 
        if token is None:
125
 
            # This test does not apply, because this lockable refuses
126
 
            # tokens.
127
 
            return
128
 
        different_token = token + 'xxx'
129
 
        # Re-using the same lockable instance with a different token will
130
 
        # raise TokenMismatch.
131
 
        self.assertRaises(errors.TokenMismatch,
132
 
                          self.lockable.lock_write, token=different_token)
133
 
        # A separate instance for the same lockable will also raise
134
 
        # TokenMismatch.
135
 
        # This detects the case where a caller claims to have a lock (via
136
 
        # the token) for an external resource, but doesn't (the token is
137
 
        # different).  Clients need a separate lock object to make sure the
138
 
        # external resource is probed, whereas the existing lock object
139
 
        # might cache.
140
 
        new_lockable = self.get_lockable()
141
 
        self.assertRaises(errors.TokenMismatch,
142
 
                          new_lockable.lock_write, token=different_token)
 
207
        try:
 
208
            if token is None:
 
209
                # This test does not apply, because this lockable refuses
 
210
                # tokens.
 
211
                return
 
212
            different_token = token + 'xxx'
 
213
            # Re-using the same lockable instance with a different token will
 
214
            # raise TokenMismatch.
 
215
            self.assertRaises(errors.TokenMismatch,
 
216
                              self.lockable.lock_write, token=different_token)
 
217
            # A seperate instance for the same lockable will also raise
 
218
            # TokenMismatch.
 
219
            # This detects the case where a caller claims to have a lock (via
 
220
            # the token) for an external resource, but doesn't (the token is
 
221
            # different).  Clients need a seperate lock object to make sure the
 
222
            # external resource is probed, whereas the existing lock object
 
223
            # might cache.
 
224
            new_lockable = self.get_lockable()
 
225
            self.assertRaises(errors.TokenMismatch,
 
226
                              new_lockable.lock_write, token=different_token)
 
227
        finally:
 
228
            self.lockable.unlock()
143
229
 
144
230
    def test_lock_write_with_matching_token(self):
145
231
        # If the token matches, so no exception is raised by lock_write.
146
232
        token = self.lockable.lock_write()
147
 
        self.addCleanup(self.lockable.unlock)
148
 
        if token is None:
149
 
            # This test does not apply, because this lockable refuses
150
 
            # tokens.
151
 
            return
152
 
        # The same instance will accept a second lock_write if the specified
153
 
        # token matches.
154
 
        self.lockable.lock_write(token=token)
155
 
        self.lockable.unlock()
156
 
        # Calling lock_write on a new instance for the same lockable will
157
 
        # also succeed.
158
 
        new_lockable = self.get_lockable()
159
 
        new_lockable.lock_write(token=token)
160
 
        new_lockable.unlock()
 
233
        try:
 
234
            if token is None:
 
235
                # This test does not apply, because this lockable refuses
 
236
                # tokens.
 
237
                return
 
238
            # The same instance will accept a second lock_write if the specified
 
239
            # token matches.
 
240
            self.lockable.lock_write(token=token)
 
241
            self.lockable.unlock()
 
242
            # Calling lock_write on a new instance for the same lockable will
 
243
            # also succeed.
 
244
            new_lockable = self.get_lockable()
 
245
            new_lockable.lock_write(token=token)
 
246
            new_lockable.unlock()
 
247
        finally:
 
248
            self.lockable.unlock()
161
249
 
162
250
    def test_unlock_after_lock_write_with_token(self):
163
251
        # If lock_write did not physically acquire the lock (because it was
164
252
        # passed a token), then unlock should not physically release it.
165
253
        token = self.lockable.lock_write()
166
 
        self.addCleanup(self.lockable.unlock)
167
 
        if token is None:
168
 
            # This test does not apply, because this lockable refuses
169
 
            # tokens.
170
 
            return
171
 
        new_lockable = self.get_lockable()
172
 
        new_lockable.lock_write(token=token)
173
 
        new_lockable.unlock()
174
 
        self.assertTrue(self.lockable.get_physical_lock_status())
 
254
        try:
 
255
            if token is None:
 
256
                # This test does not apply, because this lockable refuses
 
257
                # tokens.
 
258
                return
 
259
            new_lockable = self.get_lockable()
 
260
            new_lockable.lock_write(token=token)
 
261
            new_lockable.unlock()
 
262
            self.assertTrue(self.lockable.get_physical_lock_status())
 
263
        finally:
 
264
            self.lockable.unlock()
175
265
 
176
266
    def test_lock_write_with_token_fails_when_unlocked(self):
177
267
        # Lock and unlock to get a superficially valid token.  This mimics a
242
332
        # But should be relockable with a token.
243
333
        self.lockable.lock_write(token=token)
244
334
        self.lockable.unlock()
245
 
        # Cleanup: we should still be able to get the lock, but we restore the
246
 
        # behavior to clearing the lock when unlocking.
247
 
        self.lockable.lock_write(token=token)
248
 
        self.lockable.dont_leave_in_place()
249
 
        self.lockable.unlock()
250
335
 
251
336
    def test_dont_leave_in_place(self):
252
337
        token = self.lockable.lock_write()
271
356
        third_lockable.unlock()
272
357
 
273
358
 
274
 
# This method of adapting tests to parameters is different to
275
 
# the TestProviderAdapters used elsewhere, but seems simpler for this
276
 
# case.
 
359
# This method of adapting tests to parameters is different to 
 
360
# the TestProviderAdapters used elsewhere, but seems simpler for this 
 
361
# case.  
277
362
class TestLockableFiles_TransportLock(TestCaseInTempDir,
278
363
                                      _TestLockableFiles_mixin):
279
364
 
285
370
        self.lockable = self.get_lockable()
286
371
        self.lockable.create_lock()
287
372
 
288
 
    def stop_server(self):
289
 
        super(TestLockableFiles_TransportLock, self).stop_server()
 
373
    def tearDown(self):
 
374
        super(TestLockableFiles_TransportLock, self).tearDown()
290
375
        # free the subtransport so that we do not get a 5 second
291
376
        # timeout due to the SFTP connection cache.
292
377
        try:
296
381
 
297
382
    def get_lockable(self):
298
383
        return LockableFiles(self.sub_transport, 'my-lock', TransportLock)
299
 
 
 
384
        
300
385
 
301
386
class TestLockableFiles_LockDir(TestCaseInTempDir,
302
387
                              _TestLockableFiles_mixin):
306
391
        TestCaseInTempDir.setUp(self)
307
392
        self.transport = get_transport('.')
308
393
        self.lockable = self.get_lockable()
309
 
        # the lock creation here sets mode - test_permissions on branch
310
 
        # tests that implicitly, but it might be a good idea to factor
 
394
        # the lock creation here sets mode - test_permissions on branch 
 
395
        # tests that implicitly, but it might be a good idea to factor 
311
396
        # out the mode checking logic and have it applied to loackable files
312
397
        # directly. RBC 20060418
313
398
        self.lockable.create_lock()