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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
# (C) 2005 Canonical Ltd
# 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import os
import sha
import sys
import time
from bzrlib.errors import BzrError
from bzrlib.hashcache import HashCache
from bzrlib.tests import TestCaseInTempDir, TestSkipped
def sha1(t):
return sha.new(t).hexdigest()
def pause():
if False:
return
if sys.platform in ('win32', 'cygwin'):
time.sleep(3)
return
# allow it to stabilize
start = int(time.time())
while int(time.time()) == start:
time.sleep(0.2)
class FixThisError(Exception):
pass
class TestHashCache(TestCaseInTempDir):
def test_hashcache(self):
"""Functional tests for hashcache"""
# make a dummy bzr directory just to hold the cache
os.mkdir('.bzr')
hc = HashCache('.', '.bzr/stat-cache')
file('foo', 'wb').write('hello')
os.mkdir('subdir')
pause()
self.assertEquals(hc.get_sha1('foo'),
'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d')
self.assertEquals(hc.miss_count, 1)
self.assertEquals(hc.hit_count, 0)
# check we hit without re-reading
self.assertEquals(hc.get_sha1('foo'),
'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d')
self.assertEquals(hc.miss_count, 1)
self.assertEquals(hc.hit_count, 1)
# check again without re-reading
self.assertEquals(hc.get_sha1('foo'),
'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d')
self.assertEquals(hc.miss_count, 1)
self.assertEquals(hc.hit_count, 2)
# write new file and make sure it is seen
file('foo', 'wb').write('goodbye')
pause()
self.assertEquals(hc.get_sha1('foo'),
'3c8ec4874488f6090a157b014ce3397ca8e06d4f')
self.assertEquals(hc.miss_count, 2)
# quickly write new file of same size and make sure it is seen
# this may rely on detection of timestamps that are too close
# together to be safe
file('foo', 'wb').write('g00dbye')
self.assertEquals(hc.get_sha1('foo'),
sha1('g00dbye'))
file('foo2', 'wb').write('other file')
self.assertEquals(hc.get_sha1('foo2'), sha1('other file'))
os.remove('foo2')
self.assertEquals(hc.get_sha1('foo2'), None)
file('foo2', 'wb').write('new content')
self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))
self.assertEquals(hc.get_sha1('subdir'), None)
# pause briefly to make sure they're not treated as new uncacheable
# files
pause()
self.assertEquals(hc.get_sha1('foo'), sha1('g00dbye'))
self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))
# write out, read back in and check that we don't need to
# re-read any files
hc.write()
del hc
hc = HashCache('.', '.bzr/stat-cache')
hc.read()
self.assertEquals(len(hc._cache), 2)
self.assertEquals(hc.get_sha1('foo'), sha1('g00dbye'))
self.assertEquals(hc.hit_count, 1)
self.assertEquals(hc.miss_count, 0)
self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))
def test_hashcache_raise(self):
"""check that hashcache can raise BzrError"""
os.mkdir('.bzr')
hc = HashCache('.', '.bzr/stat-cache')
ok = False
# make a best effort to create a weird kind of file
funcs = (getattr(os, 'mkfifo', None), getattr(os, 'mknod', None))
for func in funcs:
if func is None:
continue
try:
func('a')
ok = True
break
except FixThisError:
pass
if ok:
self.assertRaises(BzrError, hc.get_sha1, 'a')
else:
raise TestSkipped('No weird file type could be created')
|