def grow_signed():
x = (15, -4)
res = bitmap.grow(x, 4)
if res == (15*2**4,-8) and bitmap.value(res) == -16:
raise Success
def grow_unsigned():
x = (5, 4)
res = bitmap.grow(x, 4)
if res == (5*2**4,8) and bitmap.value(res) == 5*2**4:
raise Success
