1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
# Copyright 2012-2015 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import shutil
import tempfile
import unittest
import obnamlib
class LockManagerTests(unittest.TestCase):
def fake_time(self):
self.now += 1
return self.now
def setUp(self):
self.tempdir = tempfile.mkdtemp()
self.dirnames = []
for x in ['a', 'b', 'c']:
dirname = os.path.join(self.tempdir, x)
os.mkdir(dirname)
self.dirnames.append(dirname)
self.fs = obnamlib.LocalFS(self.tempdir)
self.timeout = 10
self.now = 0
self.lm = obnamlib.LockManager(self.fs, self.timeout, '')
self.lm._time = self.fake_time
self.lm._sleep = lambda: None
def tearDown(self):
shutil.rmtree(self.tempdir)
def test_returns_a_lock_name(self):
self.assertEqual(type(self.lm.get_lock_name('.')), str)
def test_has_nothing_locked_initially(self):
for dirname in self.dirnames:
self.assertFalse(self.lm.is_locked(dirname))
self.assertFalse(self.lm.got_lock(dirname))
def test_locks_single_directory(self):
self.lm.lock([self.dirnames[0]])
self.assertTrue(self.lm.is_locked(self.dirnames[0]))
self.assertTrue(self.lm.got_lock(self.dirnames[0]))
def test_unlocks_single_directory(self):
self.lm.lock([self.dirnames[0]])
self.lm.unlock([self.dirnames[0]])
self.assertFalse(self.lm.is_locked(self.dirnames[0]))
self.assertFalse(self.lm.got_lock(self.dirnames[0]))
def test_waits_until_timeout_for_locked_directory(self):
self.lm.lock([self.dirnames[0]])
self.assertRaises(obnamlib.LockFail,
self.lm.lock, [self.dirnames[0]])
self.assertTrue(self.now >= self.timeout)
def test_notices_when_preexisting_lock_goes_away(self):
self.lm.lock([self.dirnames[0]])
self.lm._sleep = lambda: os.remove(
self.lm.get_lock_name(self.dirnames[0]))
self.lm.lock([self.dirnames[0]])
self.assertTrue(self.lm.is_locked(self.dirnames[0]))
def test_locks_all_directories(self):
self.lm.lock(self.dirnames)
for dirname in self.dirnames:
self.assertTrue(self.lm.is_locked(dirname))
self.assertTrue(self.lm.got_lock(dirname))
def test_unlocks_all_directories(self):
self.lm.lock(self.dirnames)
self.lm.unlock(self.dirnames)
for dirname in self.dirnames:
self.assertFalse(self.lm.is_locked(dirname))
self.assertFalse(self.lm.got_lock(dirname))
def test_does_not_lock_anything_if_one_lock_fails(self):
self.lm.lock([self.dirnames[-1]])
self.assertRaises(obnamlib.LockFail, self.lm.lock, self.dirnames)
for dirname in self.dirnames[:-1]:
self.assertFalse(self.lm.is_locked(dirname))
self.assertFalse(self.lm.got_lock(dirname))
self.assertTrue(self.lm.is_locked(self.dirnames[-1]))
def test_forces_existing_lock(self):
self.lm.lock([self.dirnames[-1]])
self.lm.force([self.dirnames[-1]])
self.assertFalse(self.lm.is_locked(self.dirnames[-1]))
self.assertFalse(self.lm.got_lock(self.dirnames[-1]))
def test_forces_missng_lock(self):
self.lm.force([self.dirnames[-1]])
self.assertFalse(self.lm.is_locked(self.dirnames[-1]))
self.assertFalse(self.lm.got_lock(self.dirnames[-1]))
|