def test_create_lunch_dinner_tree_length():
bst = food_tree.BinarySearchTree()
food_tree.create_tree(bst, 'Lunch/Dinner')
data = bst.pre_order()
actual = len(data)
expected = 17
assert actual == expected
def test_create_lunch_dinner_tree():
bst = food_tree.BinarySearchTree()
food_tree.create_tree(bst, 'Lunch/Dinner')
data = bst.pre_order()
actual = data[-1]
expected = 'Seafood'
assert actual == expected
def test_create_breakfast_tree():
bst = food_tree.BinarySearchTree()
food_tree.create_tree(bst, 'Breakfast')
data = bst.pre_order()
actual = data[-1]
expected = 'Cafe'
assert actual == expected
def test_create_breakfast_tree_length():
bst = food_tree.BinarySearchTree()
food_tree.create_tree(bst, 'Breakfast')
data = bst.pre_order()
actual = len(data)
expected = 7
assert actual == expected
def test_bst_create_root():
# given
bst = food_tree.BinarySearchTree()
expected = "The root is empty."
# when
actual = bst.__str__()
# then
assert actual == expected, 'Error creating an empty Binary Search Tree.'