def test_get_op_len(self):
"""Test that op len enables bus methods to operate on both a length and
a Bus"""
b = Bus(1, 1)
b2 = Bus(4)
branched = b.branch(4)
self.assertEqual(len(branched), 4)
branched = b.branch(b2)
self.assertEqual(len(branched), 4)
def test_branch(self):
"""Test branching feature"""
a = Bus(1)
branched_a = a.branch(4)
self.assertEqual(len(branched_a), 4)
self.assertEqual(branched_a.signal, Signal(0, 4))
a.signal = 1
self.assertEqual(branched_a.signal, Signal(2**4 - 1, 4))
