34
if sys.platform in ('win32', 'cygwin'):
37
# allow it to stabilize
38
start = int(time.time())
39
while int(time.time()) == start:
43
class FixThisError(Exception):
47
36
class TestHashCache(TestCaseInTempDir):
49
def test_hashcache(self):
50
"""Functional tests for hashcache"""
37
"""Test the hashcache against a real directory"""
39
def make_hashcache(self):
52
40
# make a dummy bzr directory just to hold the cache
54
42
hc = HashCache('.', '.bzr/stat-cache')
56
file('foo', 'wb').write('hello')
45
def reopen_hashcache(self):
46
hc = HashCache('.', '.bzr/stat-cache')
50
def test_hashcache_initial_miss(self):
51
"""Get correct hash from an empty hashcache"""
52
hc = self.make_hashcache()
53
self.build_tree_contents([('foo', 'hello')])
60
54
self.assertEquals(hc.get_sha1('foo'),
61
55
'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d')
62
56
self.assertEquals(hc.miss_count, 1)
63
57
self.assertEquals(hc.hit_count, 0)
65
# check we hit without re-reading
66
self.assertEquals(hc.get_sha1('foo'),
67
'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d')
68
self.assertEquals(hc.miss_count, 1)
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self.assertEquals(hc.hit_count, 1)
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# check again without re-reading
72
self.assertEquals(hc.get_sha1('foo'),
73
'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d')
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self.assertEquals(hc.miss_count, 1)
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self.assertEquals(hc.hit_count, 2)
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# write new file and make sure it is seen
78
file('foo', 'wb').write('goodbye')
80
self.assertEquals(hc.get_sha1('foo'),
81
'3c8ec4874488f6090a157b014ce3397ca8e06d4f')
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self.assertEquals(hc.miss_count, 2)
84
# quickly write new file of same size and make sure it is seen
85
# this may rely on detection of timestamps that are too close
87
file('foo', 'wb').write('g00dbye')
88
self.assertEquals(hc.get_sha1('foo'),
91
file('foo2', 'wb').write('other file')
92
self.assertEquals(hc.get_sha1('foo2'), sha1('other file'))
95
self.assertEquals(hc.get_sha1('foo2'), None)
97
file('foo2', 'wb').write('new content')
98
self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))
59
def test_hashcache_new_file(self):
60
hc = self.make_hashcache()
61
self.build_tree_contents([('foo', 'goodbye')])
62
# now read without pausing; it may not be possible to cache it as its
64
self.assertEquals(hc.get_sha1('foo'), sha1('goodbye'))
66
def test_hashcache_nonexistent_file(self):
67
hc = self.make_hashcache()
68
self.assertEquals(hc.get_sha1('no-name-yet'), None)
70
def test_hashcache_replaced_file(self):
71
hc = self.make_hashcache()
72
self.build_tree_contents([('foo', 'goodbye')])
73
self.assertEquals(hc.get_sha1('foo'), sha1('goodbye'))
75
self.assertEquals(hc.get_sha1('foo'), None)
76
self.build_tree_contents([('foo', 'new content')])
77
self.assertEquals(hc.get_sha1('foo'), sha1('new content'))
79
def test_hashcache_not_file(self):
80
hc = self.make_hashcache()
81
self.build_tree(['subdir/'])
100
82
self.assertEquals(hc.get_sha1('subdir'), None)
102
# pause briefly to make sure they're not treated as new uncacheable
84
def test_hashcache_load(self):
85
hc = self.make_hashcache()
86
self.build_tree_contents([('foo', 'contents')])
106
self.assertEquals(hc.get_sha1('foo'), sha1('g00dbye'))
107
self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))
109
# write out, read back in and check that we don't need to
88
self.assertEquals(hc.get_sha1('foo'), sha1('contents'))
114
hc = HashCache('.', '.bzr/stat-cache')
117
self.assertEquals(len(hc._cache), 2)
118
self.assertEquals(hc.get_sha1('foo'), sha1('g00dbye'))
90
hc = self.reopen_hashcache()
91
self.assertEquals(hc.get_sha1('foo'), sha1('contents'))
119
92
self.assertEquals(hc.hit_count, 1)
120
self.assertEquals(hc.miss_count, 0)
121
self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))
94
def test_hammer_hashcache(self):
95
hc = self.make_hashcache()
96
for i in xrange(10000):
97
self.log('start writing at %s', time.time())
100
last_content = '%08x' % i
101
f.write(last_content)
104
last_sha1 = sha1(last_content)
105
self.log("iteration %d: %r -> %r",
106
i, last_content, last_sha1)
107
got_sha1 = hc.get_sha1('foo')
108
self.assertEquals(got_sha1, last_sha1)
110
hc = self.reopen_hashcache()
123
112
def test_hashcache_raise(self):
124
113
"""check that hashcache can raise BzrError"""
127
hc = HashCache('.', '.bzr/stat-cache')
130
# make a best effort to create a weird kind of file
131
funcs = (getattr(os, 'mkfifo', None), getattr(os, 'mknod', None))
143
self.assertRaises(BzrError, hc.get_sha1, 'a')
114
self.requireFeature(OsFifoFeature)
115
hc = self.make_hashcache()
117
# It's possible that the system supports fifos but the filesystem
118
# can't. In that case we should skip at this point. But in fact
119
# such combinations don't usually occur for the filesystem where
121
self.assertRaises(BzrError, hc.get_sha1, 'a')
124
class FakeHashCache(HashCache):
125
"""Hashcache that consults a fake clock rather than the real one.
127
This lets us examine how old or new files would be handled, without
128
actually having to wait for time to pass.
131
# set root and cache file name to none to make sure we won't touch the
133
HashCache.__init__(self, '.', 'hashcache')
135
# simulated clock running forward as operations happen
138
def put_file(self, filename, file_contents):
139
abspath = './' + filename
140
self._files[abspath] = (file_contents, self._clock)
142
def _fingerprint(self, abspath, fs=None):
143
entry = self._files[abspath]
144
return (len(entry[0]),
149
def _really_sha1_file(self, abspath):
150
if abspath in self._files:
151
return sha1(self._files[abspath][0])
145
raise TestSkipped('No weird file type could be created')
155
def _cutoff_time(self):
156
return self._clock - 2
158
def pretend_to_sleep(self, secs):
162
class TestHashCacheFakeFilesystem(TestCaseInTempDir):
163
"""Tests the hashcache using a simulated OS.
166
def make_hashcache(self):
167
return FakeHashCache()
169
def test_hashcache_miss_new_file(self):
170
"""A new file gives the right sha1 but misses"""
171
hc = self.make_hashcache()
172
hc.put_file('foo', 'hello')
173
self.assertEquals(hc.get_sha1('foo'), sha1('hello'))
174
self.assertEquals(hc.miss_count, 1)
175
self.assertEquals(hc.hit_count, 0)
176
# if we try again it's still too new;
177
self.assertEquals(hc.get_sha1('foo'), sha1('hello'))
178
self.assertEquals(hc.miss_count, 2)
179
self.assertEquals(hc.hit_count, 0)
181
def test_hashcache_old_file(self):
182
"""An old file gives the right sha1 and hits"""
183
hc = self.make_hashcache()
184
hc.put_file('foo', 'hello')
185
hc.pretend_to_sleep(20)
186
# file is new; should get the correct hash but miss
187
self.assertEquals(hc.get_sha1('foo'), sha1('hello'))
188
self.assertEquals(hc.miss_count, 1)
189
self.assertEquals(hc.hit_count, 0)
191
self.assertEquals(hc.get_sha1('foo'), sha1('hello'))
192
self.assertEquals(hc.miss_count, 1)
193
self.assertEquals(hc.hit_count, 1)
194
hc.pretend_to_sleep(3)
196
self.assertEquals(hc.get_sha1('foo'), sha1('hello'))
197
self.assertEquals(hc.miss_count, 1)
198
self.assertEquals(hc.hit_count, 2)
200
def test_hashcache_invalidates(self):
201
hc = self.make_hashcache()
202
hc.put_file('foo', 'hello')
203
hc.pretend_to_sleep(20)
205
hc.put_file('foo', 'h1llo')
206
self.assertEquals(hc.get_sha1('foo'), sha1('h1llo'))
207
self.assertEquals(hc.miss_count, 2)
208
self.assertEquals(hc.hit_count, 0)