124
125
self.assertRaises(errors.LockBroken, self.lockable.unlock)
125
126
self.assertFalse(self.lockable.is_locked())
127
def test_lock_write_returns_None_refuses_token(self):
128
token = self.lockable.lock_write()
130
if token is not None:
131
# This test does not apply, because this lockable supports
134
self.assertRaises(errors.TokenLockingNotSupported,
135
self.lockable.lock_write, token='token')
137
self.lockable.unlock()
139
def test_lock_write_returns_token_when_given_token(self):
140
token = self.lockable.lock_write()
143
# This test does not apply, because this lockable refuses
146
new_lockable = self.get_lockable()
147
token_from_new_lockable = new_lockable.lock_write(token=token)
149
self.assertEqual(token, token_from_new_lockable)
151
new_lockable.unlock()
153
self.lockable.unlock()
155
def test_lock_write_raises_on_token_mismatch(self):
156
token = self.lockable.lock_write()
159
# This test does not apply, because this lockable refuses
162
different_token = token + 'xxx'
163
# Re-using the same lockable instance with a different token will
164
# raise TokenMismatch.
165
self.assertRaises(errors.TokenMismatch,
166
self.lockable.lock_write, token=different_token)
167
# A seperate instance for the same lockable will also raise
169
# This detects the case where a caller claims to have a lock (via
170
# the token) for an external resource, but doesn't (the token is
171
# different). Clients need a seperate lock object to make sure the
172
# external resource is probed, whereas the existing lock object
174
new_lockable = self.get_lockable()
175
self.assertRaises(errors.TokenMismatch,
176
new_lockable.lock_write, token=different_token)
178
self.lockable.unlock()
180
def test_lock_write_with_matching_token(self):
181
# If the token matches, so no exception is raised by lock_write.
182
token = self.lockable.lock_write()
185
# This test does not apply, because this lockable refuses
188
# The same instance will accept a second lock_write if the specified
190
self.lockable.lock_write(token=token)
191
self.lockable.unlock()
192
# Calling lock_write on a new instance for the same lockable will
194
new_lockable = self.get_lockable()
195
new_lockable.lock_write(token=token)
196
new_lockable.unlock()
198
self.lockable.unlock()
200
def test_unlock_after_lock_write_with_token(self):
201
# If lock_write did not physically acquire the lock (because it was
202
# passed a token), then unlock should not physically release it.
203
token = self.lockable.lock_write()
206
# This test does not apply, because this lockable refuses
209
new_lockable = self.get_lockable()
210
new_lockable.lock_write(token=token)
211
new_lockable.unlock()
212
self.assertTrue(self.lockable.get_physical_lock_status())
214
self.lockable.unlock()
216
def test_lock_write_with_token_fails_when_unlocked(self):
217
# Lock and unlock to get a superficially valid token. This mimics a
218
# likely programming error, where a caller accidentally tries to lock
219
# with a token that is no longer valid (because the original lock was
221
token = self.lockable.lock_write()
222
self.lockable.unlock()
224
# This test does not apply, because this lockable refuses
228
self.assertRaises(errors.TokenMismatch,
229
self.lockable.lock_write, token=token)
231
def test_lock_write_reenter_with_token(self):
232
token = self.lockable.lock_write()
235
# This test does not apply, because this lockable refuses
238
# Relock with a token.
239
token_from_reentry = self.lockable.lock_write(token=token)
241
self.assertEqual(token, token_from_reentry)
243
self.lockable.unlock()
245
self.lockable.unlock()
246
# The lock should be unlocked on disk. Verify that with a new lock
248
new_lockable = self.get_lockable()
249
# Calling lock_write now should work, rather than raise LockContention.
250
new_lockable.lock_write()
251
new_lockable.unlock()
253
def test_second_lock_write_returns_same_token(self):
254
first_token = self.lockable.lock_write()
256
if first_token is None:
257
# This test does not apply, because this lockable refuses
260
# Relock the already locked lockable. It should return the same
262
second_token = self.lockable.lock_write()
264
self.assertEqual(first_token, second_token)
266
self.lockable.unlock()
268
self.lockable.unlock()
270
def test_leave_in_place(self):
271
token = self.lockable.lock_write()
274
# This test does not apply, because this lockable refuses
277
self.lockable.leave_in_place()
279
self.lockable.unlock()
280
# At this point, the lock is still in place on disk
281
self.assertRaises(errors.LockContention, self.lockable.lock_write)
282
# But should be relockable with a token.
283
self.lockable.lock_write(token=token)
284
self.lockable.unlock()
286
def test_dont_leave_in_place(self):
287
token = self.lockable.lock_write()
290
# This test does not apply, because this lockable refuses
293
self.lockable.leave_in_place()
295
self.lockable.unlock()
296
# At this point, the lock is still in place on disk.
297
# Acquire the existing lock with the token, and ask that it is removed
298
# when this object unlocks, and unlock to trigger that removal.
299
new_lockable = self.get_lockable()
300
new_lockable.lock_write(token=token)
301
new_lockable.dont_leave_in_place()
302
new_lockable.unlock()
303
# At this point, the lock is no longer on disk, so we can lock it.
304
third_lockable = self.get_lockable()
305
third_lockable.lock_write()
306
third_lockable.unlock()
309
129
# This method of adapting tests to parameters is different to
310
130
# the TestProviderAdapters used elsewhere, but seems simpler for this
added
removed
bzrlib/tests/test_lockable_files.py
