def test_collision_traverser_pickle():
from direct.stdpy.pickle import dumps, loads
handler = CollisionHandlerQueue()
collider1 = NodePath(CollisionNode("collider1"))
collider2 = NodePath(CollisionNode("collider2"))
trav = CollisionTraverser("test123")
trav.respect_prev_transform = True
trav.add_collider(collider1, handler)
trav.add_collider(collider2, handler)
trav = loads(dumps(trav, -1))
assert trav.respect_prev_transform is True
assert trav.name == "test123"
assert trav.get_num_colliders() == 2
collider1 = trav.get_collider(0)
collider2 = trav.get_collider(1)
assert collider1.name == "collider1"
assert collider2.name == "collider2"
# Two colliders must still be the same object; this only works with our own
# version of the pickle module, in direct.stdpy.pickle.
assert trav.get_handler(collider1) == trav.get_handler(collider2)
