2 from __future__ import absolute_import, print_function
4 import errno, platform, tempfile
8 from bup.helpers import mkdirp
10 def test_bloom(tmpdir):
11 hashes = [os.urandom(20) for i in range(100)]
15 ix.name = b'dummy.idx'
16 ix.shatable = b''.join(hashes)
18 b = bloom.create(tmpdir + b'/pybuptest.bloom', expected=100, k=k)
20 assert b.pfalse_positive() < .1
22 b = bloom.ShaBloom(tmpdir + b'/pybuptest.bloom')
25 all_present &= (b.exists(h) or False)
28 for h in [os.urandom(20) for i in range(1000)]:
31 assert false_positives < 5
32 os.unlink(tmpdir + b'/pybuptest.bloom')
34 tf = tempfile.TemporaryFile(dir=tmpdir)
35 b = bloom.create(b'bup.bloom', f=tf, expected=100)
39 # Test large (~1GiB) filter. This may fail on s390 (31-bit
40 # architecture), and anywhere else where the address space is
41 # sufficiently limited.
42 tf = tempfile.TemporaryFile(dir=tmpdir)
45 b = bloom.create(b'bup.bloom', f=tf, expected=2**28,
48 except EnvironmentError as ex:
49 (ptr_width, linkage) = platform.architecture()
50 if ptr_width == '32bit' and ex.errno == errno.ENOMEM:
51 logging.getLogger().info('skipping large bloom filter test (mmap probably failed) '