def test_search_returns_appropriate_node_to_right():
root_node = BinaryTreeNode(5)
child_node = BinaryTreeNode(7)
new_node = BinaryTreeNode(6)
tree = BinaryTree(root_node)
tree.insert_node(child_node)
tree.insert_node(new_node)
result = tree.search(6)
assert result == new_node
def test_search_returns_none_when_not_present():
new_node = BinaryTreeNode(1)
tree = BinaryTree(new_node)
result = tree.search(2)
assert result == None
def test_search_returns_root_when_value_at_root():
new_node = BinaryTreeNode(1)
tree = BinaryTree(new_node)
result = tree.search(1)
assert result == new_node