def test_hash_collisions(self):
keyvals = {}
for b, d in itertools.product([True, False], [True, False]):
for i in range(255):
bstr = byte_to_bin(i)
keyvals[bstr] = xor_chain(bstr, b, d)
c = collections.Counter(keyvals.values())
duplicates = [i for i in c if c[i]>1]
self.assertEquals(0, len(duplicates),
("duplicates found: {0}."
"# originals: {1}, # duplicates {2}").format(
duplicates,
len(duplicates),
len(keyvals.values())))
def test_xor_chain(self):
for bytestr, noargs, keyT, len6, keyTlen3 in HashTest.test_strings:
self.assertEquals(xor_chain(bytestr), noargs)
self.assertEquals(xor_chain(bytestr, key=True), keyT)
self.assertEquals(xor_chain(bytestr, length=6), len6)
self.assertEquals(xor_chain(bytestr, key=True, length=3), keyTlen3)
