def test_inherit():
bag = Bag('a', a=1)
bag2 = Bag.inherit('b', b=2, _parent=bag)
bag3 = bag.extend('c', c=3)
bag4 = Bag('d', d=4)
assert bag.args == ('a', )
assert bag.kwargs == {'a': 1}
assert bag.flags is ()
assert bag2.args == ('a', 'b', )
assert bag2.kwargs == {'a': 1, 'b': 2}
assert INHERIT_INPUT in bag2.flags
assert bag3.args == ('a', 'c', )
assert bag3.kwargs == {'a': 1, 'c': 3}
assert bag3.flags is ()
assert bag4.args == ('d', )
assert bag4.kwargs == {'d': 4}
assert bag4.flags is ()
bag4.set_parent(bag)
assert bag4.args == ('a', 'd', )
assert bag4.kwargs == {'a': 1, 'd': 4}
assert bag4.flags is ()
bag4.set_parent(bag3)
assert bag4.args == ('a', 'c', 'd', )
assert bag4.kwargs == {'a': 1, 'c': 3, 'd': 4}
assert bag4.flags is ()
def test_pickle():
bag1 = Bag('a', a=1)
bag2 = Bag.inherit('b', b=2, _parent=bag1)
bag3 = bag1.extend('c', c=3)
bag4 = Bag('d', d=4)
# XXX todo this probably won't work with inheriting bags if parent is not there anymore? maybe that's not true
# because the parent may be in the serialization output but we need to verify this assertion.
for bag in bag1, bag2, bag3, bag4:
pickled = pickle.dumps(bag)
unpickled = pickle.loads(pickled)
assert unpickled == bag