def test3(self):
bv = BitVector(32, 0x12345678)
for i in xrange(31,0,-1):
bv.set_num_bits(i)
mask = ( 1 << i ) - 1
self.assert_(bv.num_bits == i)
self.assert_(bv.bin_data == (0x12345678 & mask ))
self.assert_(bv.is_x == 0)
bv = BitVector(32)
for i in xrange(31,0,-1):
bv.set_num_bits(i)
mask = ( 1 << i ) - 1
self.assert_(bv.num_bits == i)
self.assert_(bv.is_x == mask)
