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# (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
from bzrlib.selftest import TestCaseInTempDir
def sha1(t):
import sha
return sha.new(t).hexdigest()
def pause():
import time
# allow it to stabilize
start = int(time.time())
while int(time.time()) == start:
time.sleep(0.2)
class TestHashCache(TestCaseInTempDir):
def test_hashcache(self):
"""Functional tests for hashcache"""
from bzrlib.hashcache import HashCache
import os
# make a dummy bzr directory just to hold the cache
os.mkdir('.bzr')
hc = HashCache('.')
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)
# it's likely neither are cached at the moment because they
# changed recently, but we can't be sure
pause()
# should now be safe to cache it if we reread them
self.assertEquals(hc.get_sha1('foo'), sha1('g00dbye'))
self.assertEquals(len(hc._cache), 1)
self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))
self.assertEquals(len(hc._cache), 2)
# write out, read back in and check that we don't need to
# re-read any files
hc.write()
del hc
hc = HashCache('.')
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'))
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