def test_binary_tree_can_be_created_with_proper_parameters():
new_node = BinaryTreeNode(1)
result = BinaryTree(new_node)
assert result.get_root() == new_node
def test_binary_tree_insert_node_sets_node_to_root_when_there_is_no_root():
new_node = BinaryTreeNode(1)
tree = BinaryTree()
tree.insert_node(new_node)
assert tree.get_root() == new_node