def test_distance_random(self, qty=1000):
for i in range(qty):
a = Bitstring()
b = Bitstring()
dist = sum([ 1 for x, y in zip(str(a), str(b)) if x != y ])
self.assertEqual(Bitstring.distance(a, b), dist)
def test_distance_zero(self, qty=1000):
for i in range(qty):
a = Bitstring()
self.assertEqual(Bitstring.distance(a, a), 0)
