def test_unencoded(self, args):
blob = args[0]
hyp.assume(len(blob) != 0)
string = args[1]
with pytest.raises(TypeError):
bf.hamming_distance(string, blob)
with pytest.raises(TypeError):
bf.hamming_distance(blob, string)
def _rate_repeating_xor_keysize(ciphertext, size):
block1 = ciphertext[:size]
block2 = ciphertext[size:2 * size]
return hamming_distance(block1, block2) / size
def test_hamming_distance(self):
assert bf.hamming_distance(b"this is a test", b"wokka wokka!!!") == 37
def test_example_distances(self):
assert bf.hamming_distance(b"bla", b"alb") == 4
assert bf.hamming_distance(b"bla", b"BLA") == 3
assert bf.hamming_distance([1, 2, 3], [0, 5, 5]) == 6
def test_subadditive(self, list_):
dist01 = bf.hamming_distance(list_[0], list_[1])
dist12 = bf.hamming_distance(list_[1], list_[2])
dist02 = bf.hamming_distance(list_[0], list_[2])
assert dist02 <= dist01 + dist12
def test_symmetrical(self, list_):
left = list_[0]
right = list_[1]
assert bf.hamming_distance(left, right) == \
bf.hamming_distance(right, left)
def test_identical(self, arg):
assert bf.hamming_distance(arg, arg) == 0
def test_out_of_range(self, list_):
hyp.assume(len(list_) != 0)
with pytest.raises(ValueError):
bf.hamming_distance(list_, list_)
def test_lists(self):
assert bf.hamming_distance([1, 2, 3], [1, 2, 3]) == 0
def test_empty(self):
assert bf.hamming_distance([], []) == 0
assert bf.hamming_distance(b"", b"") == 0
def test_different_length(self, left, right):
hyp.assume(len(left) != len(right))
with pytest.raises(ValueError):
bf.hamming_distance(left, right)