def test_construct():
"""
GIVEN
WHEN linked list is constructed
THEN head is None.
"""
list_ = linked_list.LinkedList()
assert list_.head is None
def test_add_empty(empty_list):
"""
GIVEN empty linked list value to add
WHEN add is called with the value
THEN head is replaced with a Node with value set to input value and next_ set to
None.
"""
list_ = linked_list.LinkedList()
value = "value 1"
list_.add_first(value)
assert list_.head.value == value
assert list_.head.next_ is None
def __init__(self):
"""Construct."""
self._list = linked_list.LinkedList()
def empty_list():
"""Linked list with empty value."""
list_ = linked_list.LinkedList()
return list_