def test_pre_order_multiple_nodes():
"""Test preorder on larger tree."""
from bst import Tree
test_list = [10, 7, 12, 5, 9, 11, 13, 4]
test_tree = Tree(test_list)
test_results = [10, 7, 5, 4, 9, 12, 11, 13]
path = test_tree.pre_order(test_tree.root)
count = 0
for i in path:
assert i.data == test_results[count]
count += 1
