def test_backprop_root_visited(tree: mcts.Node):
state = mcts.State()
root = tree(state, 5)
mcts.backprop(5, root.children[0].children[0])
assert root.visited == 1
def test_backprop_node1_value(tree: mcts.Node):
state = mcts.State()
root = tree(state, 5)
mcts.backprop(5, root.children[0].children[0])
assert root.children[0].value == 5