def test_breath_first_solo():
"""Test running breath on a tree with one Node."""
from bst import BST
b = BST([25])
breath = b.breath_first()
breath_first_list = []
for ii in breath:
breath_first_list.append(ii)
assert breath_first_list == [25]
def test_breath_first_empty():
"""Test an empty Node returns empty list."""
from bst import BST
b = BST()
breath = b.breath_first()
breath_first_list = []
for ii in breath:
breath_first_list.append(ii)
assert breath_first_list == []
