def test_bitstring_xor(self):
bs1 = Bitstring.init_random(1000)
bs2 = Bitstring.init_ones(1000)
bs3 = bs1.copy()
bs3.xor(bs2)
self.assertEqual(1000, bs1.distance_to(bs3))
bs2 = Bitstring.init_zeros(1000)
bs3 = bs1.copy()
bs3.xor(bs2)
self.assertEqual(0, bs1.distance_to(bs3))
def test_bitstring_init_zeros(self):
bs1 = Bitstring.init_zeros(1000)
cnt0 = bs1.to_binary().count('0')
self.assertEqual(1000, cnt0)