def xor_buffers(left, right):
"""Xor two bytes-like objects, repeating the shorter as needed"""
return bytes(xor_pairs(repeating_zip(left, right)))
def test_symmetrical(self, pairs):
pairs = [pair for pair in pairs]
flipped = [pair[::-1] for pair in pairs]
assert list(bf.xor_pairs(pairs)) == list(bf.xor_pairs(flipped))
def test_empty(self):
assert list(bf.xor_pairs([])) == []
def test_self_xor_yields_zero(self, ints):
length = len(ints)
pairs = [(el, el) for el in ints]
result = list(bf.xor_pairs(pairs))
should_be = [0] * length
assert result == should_be
def test_length_preserved(self, pairs):
list_ = list(pairs)
assert len(list_) == len(list(bf.xor_pairs(list_)))
def test_known_values(self):
pairs = [(1, 1), (7, 0), (3, 1), (512, 1), (-1, 3), (-7, 6)]
result = list(bf.xor_pairs(pairs))
assert result == [0, 7, 2, 513, -4, -1]
def test_not_pairs(self):
with pytest.raises(TypeError):
list(bf.xor_pairs(iter([1, 2, 3])))
def test_not_xorable(self):
with pytest.raises(TypeError):
list(bf.xor_pairs([(1, "bla"), (2, "blo"), (3, "bli")]))