def test_insert_mulitple_nodes_return_correct_size():
"""Test for multiple node insertion."""
from bst import Tree
test_tree = Tree()
test_values = random.sample(range(100), 10)
for i in test_values:
test_tree.insert(i)
assert test_tree.size() == len(test_values)
def test_insert_one_node_return_size_one():
"""Test for one node insertion."""
from bst import Tree
test_tree = Tree()
test_tree.insert(1)
assert test_tree.size() == 1
def test_size_method_with_no_nodes():
"""Test if size method returns zero when no nodes in Tree."""
from bst import Tree
new_tree = Tree()
new_tree.size() == 0
def test_create_tree_none_root():
"""Test create an empty tree."""
from bst import Tree
test_tree = Tree()
assert test_tree.size() == 0
def test_tree_initialized():
"""Test if Tree is created."""
from bst import Tree
test_tree = Tree()
test_tree.size = 0
