def test_cuckoo_filter_bytes(self): """test exporting a cuckoo filter to bytes""" md5sum = "1371760d4ee9ccbe83e0144919750140" cko = CuckooFilter() for i in range(1000): cko.add(str(i)) md5_out = hashlib.md5(bytes(cko)).hexdigest() self.assertEqual(md5sum, md5_out)
def runner(): """runner""" cko = CuckooFilter(capacity=100, bucket_size=2, max_swaps=100, auto_expand=False) for i in range(175): cko.add(str(i))
def test_cuckoo_filter_expand_els(self): """test out the expansion of the cuckoo filter""" cko = CuckooFilter() for i in range(200): cko.add(str(i)) cko.expand() for i in range(200): self.assertTrue(cko.check(str(i))) self.assertEqual(20000, cko.capacity)
def test_cuckoo_filter_auto_expand(self): """test inserting until cuckoo filter is full""" cko = CuckooFilter(capacity=100, bucket_size=2, max_swaps=100) for i in range(375): # this would fail if it doesn't expand cko.add(str(i)) self.assertEqual(400, cko.capacity) self.assertEqual(375, cko.elements_added) for i in range(375): self.assertTrue(cko.check(str(i)))
def test_cuckoo_filter_export(self): ''' test exporting a cuckoo filter ''' filename = './test.cko' md5sum = '49b947ddf364d27934570a6b33076b93' cko = CuckooFilter() for i in range(1000): cko.add(str(i)) cko.export(filename) md5_out = calc_file_md5(filename) self.assertEqual(md5sum, md5_out) os.remove(filename)
def test_cuckoo_full_msg(self): ''' test exception message for full cuckoo filter ''' try: cko = CuckooFilter(capacity=100, bucket_size=2, max_swaps=100, auto_expand=False) for i in range(175): cko.add(str(i)) except CuckooFilterFullError as ex: self.assertEqual(str(ex), 'The CuckooFilter is currently full') else: self.assertEqual(True, False)
def test_cuckoo_filter_export(self): """test exporting a cuckoo filter""" md5sum = "1371760d4ee9ccbe83e0144919750140" with NamedTemporaryFile(dir=os.getcwd(), suffix=".cko", delete=DELETE_TEMP_FILES) as fobj: cko = CuckooFilter() for i in range(1000): cko.add(str(i)) cko.export(fobj.name) md5_out = calc_file_md5(fobj.name) self.assertEqual(md5sum, md5_out)
def test_cuckoo_filter_diff_hash(self): ''' test using a different hash function ''' def my_hash(key): return int(hashlib.sha512(key.encode('utf-8')).hexdigest(), 16) cko = CuckooFilter(capacity=100, bucket_size=2, max_swaps=15, expansion_rate=4, finger_size=2, auto_expand=False, hash_function=my_hash) for i in range(50): cko.add('this is a test - {}'.format(i)) for i in range(50): self.assertTrue('this is a test - {}'.format(i) in cko)
def test_cuckoo_filter_frombytes(self): """test initializing a cuckoo filter from bytes""" cko = CuckooFilter() for i in range(1000): cko.add(str(i)) bytes_out = bytes(cko) cko2 = CuckooFilter.frombytes(bytes_out) self.assertEqual(bytes_out, bytes(cko2)) for i in range(1000): self.assertTrue(cko2.check(str(i))) self.assertFalse(cko2.check("9999"))
def test_cuckoo_filter_l_fact(self): """test the load factor of the cuckoo filter""" cko = CuckooFilter(capacity=100, bucket_size=2, max_swaps=10) self.assertEqual(cko.load_factor(), 0.0) for i in range(50): cko.add(str(i)) self.assertEqual(cko.load_factor(), 0.25) for i in range(50): cko.add(str(i + 50)) if cko.capacity == 200: # self expanded self.assertEqual(cko.load_factor(), 0.25) else: self.assertEqual(cko.load_factor(), 0.50)
def test_cuckoo_filter_str(self): """test the str representation of the cuckoo filter""" cko = CuckooFilter(capacity=100, bucket_size=2, max_swaps=100) for i in range(75): cko.add(str(i)) msg = ("CuckooFilter:\n" "\tCapacity: 100\n" "\tTotal Bins: 200\n" "\tLoad Factor: 37.5%\n" "\tInserted Elements: 75\n" "\tMax Swaps: 100\n" "\tExpansion Rate: 2\n" "\tAuto Expand: True") self.assertEqual(str(cko), msg)
def test_cuckoo_filter_load(self): ''' test loading a saved cuckoo filter ''' filename = './test.cko' md5sum = '49b947ddf364d27934570a6b33076b93' cko = CuckooFilter() for i in range(1000): cko.add(str(i)) cko.export(filename) md5_out = calc_file_md5(filename) self.assertEqual(md5sum, md5_out) ckf = CuckooFilter(filepath=filename) for i in range(1000): self.assertTrue(ckf.check(str(i))) self.assertEqual(10000, ckf.capacity) self.assertEqual(4, ckf.bucket_size) self.assertEqual(500, ckf.max_swaps) self.assertEqual(0.025, ckf.load_factor()) os.remove(filename)
def test_cuckoo_filter_load(self): """test loading a saved cuckoo filter""" md5sum = "1371760d4ee9ccbe83e0144919750140" with NamedTemporaryFile(dir=os.getcwd(), suffix=".cko", delete=DELETE_TEMP_FILES) as fobj: cko = CuckooFilter() for i in range(1000): cko.add(str(i)) cko.export(fobj.name) md5_out = calc_file_md5(fobj.name) self.assertEqual(md5sum, md5_out) ckf = CuckooFilter(filepath=fobj.name) for i in range(1000): self.assertTrue(ckf.check(str(i))) self.assertEqual(10000, ckf.capacity) self.assertEqual(4, ckf.bucket_size) self.assertEqual(500, ckf.max_swaps) self.assertEqual(0.025, ckf.load_factor())
def test_cuckoo_filter_add(self): ''' test adding to the cuckoo filter ''' cko = CuckooFilter() cko.add('this is a test') self.assertEqual(cko.elements_added, 1) cko.add('this is another test') self.assertEqual(cko.elements_added, 2) cko.add('this is yet another test') self.assertEqual(cko.elements_added, 3)
def test_cuckoo_filter_add(self): """test adding to the cuckoo filter""" cko = CuckooFilter() cko.add("this is a test") self.assertEqual(cko.elements_added, 1) cko.add("this is another test") self.assertEqual(cko.elements_added, 2) cko.add("this is yet another test") self.assertEqual(cko.elements_added, 3)
def test_cuckoo_filter_check(self): ''' test checking if element in cuckoo filter ''' cko = CuckooFilter() cko.add('this is a test') cko.add('this is another test') cko.add('this is yet another test') self.assertEqual(cko.check('this is a test'), True) self.assertEqual(cko.check('this is another test'), True) self.assertEqual(cko.check('this is yet another test'), True) self.assertEqual(cko.check('this is not another test'), False) self.assertEqual(cko.check('this is not a test'), False)
def test_cuckoo_filter_in(self): """test checking using 'in' cuckoo filter""" cko = CuckooFilter() cko.add("this is a test") cko.add("this is another test") cko.add("this is yet another test") self.assertEqual("this is a test" in cko, True) self.assertEqual("this is another test" in cko, True) self.assertEqual("this is yet another test" in cko, True) self.assertEqual("this is not another test" in cko, False) self.assertEqual("this is not a test" in cko, False)
def test_cuckoo_filter_in(self): ''' test checking using 'in' cuckoo filter ''' cko = CuckooFilter() cko.add('this is a test') cko.add('this is another test') cko.add('this is yet another test') self.assertEqual('this is a test' in cko, True) self.assertEqual('this is another test' in cko, True) self.assertEqual('this is yet another test' in cko, True) self.assertEqual('this is not another test' in cko, False) self.assertEqual('this is not a test' in cko, False)
def test_cuckoo_filter_check(self): """test checking if element in cuckoo filter""" cko = CuckooFilter() cko.add("this is a test") cko.add("this is another test") cko.add("this is yet another test") self.assertEqual(cko.check("this is a test"), True) self.assertEqual(cko.check("this is another test"), True) self.assertEqual(cko.check("this is yet another test"), True) self.assertEqual(cko.check("this is not another test"), False) self.assertEqual(cko.check("this is not a test"), False)
def test_cuckoo_filter_remove_miss(self): ''' test removing from the cuckoo filter when not present ''' cko = CuckooFilter() cko.add('this is a test') self.assertEqual(cko.elements_added, 1) cko.add('this is another test') self.assertEqual(cko.elements_added, 2) cko.add('this is yet another test') self.assertEqual(cko.elements_added, 3) res = cko.remove('this is still a test') self.assertFalse(res) self.assertEqual(cko.elements_added, 3) self.assertTrue(cko.check('this is a test')) self.assertTrue(cko.check('this is another test')) self.assertTrue(cko.check('this is yet another test'))
def test_cuckoo_filter_remove(self): """test removing from the cuckoo filter""" cko = CuckooFilter() cko.add("this is a test") self.assertEqual(cko.elements_added, 1) cko.add("this is another test") self.assertEqual(cko.elements_added, 2) cko.add("this is yet another test") self.assertEqual(cko.elements_added, 3) res = cko.remove("this is a test") self.assertTrue(res) self.assertEqual(cko.elements_added, 2) self.assertFalse(cko.check("this is a test")) self.assertTrue(cko.check("this is another test")) self.assertTrue(cko.check("this is yet another test"))
def test_cuckoo_filter_lots(self): """test inserting lots into the cuckoo filter""" cko = CuckooFilter(capacity=100, bucket_size=2, max_swaps=100) for i in range(125): cko.add(str(i)) self.assertEqual(cko.elements_added, 125)
from probables import (CuckooFilter) from probables import (CountingCuckooFilter) cko = CuckooFilter(capacity=100, max_swaps=10) cko.add('google.com') cko.check('facebook.com') # should return False cko.check('google.com') # should return True cck = CountingCuckooFilter(capacity=100, max_swaps=10) cck.add("google") cck.add("google") cck.add("google") print(cck.check("google")) cck.remove("google") print(cck.check("google"))
def test_cuckoo_filter_dup_add(self): """test adding same item multiple times cuckoo filter""" cko = CuckooFilter() cko.add("this is a test") cko.add("this is another test") cko.add("this is yet another test") self.assertEqual(cko.elements_added, 3) cko.add("this is a test") cko.add("this is another test") cko.add("this is yet another test") self.assertEqual(cko.elements_added, 3)