def test_remove_head_node_length3():
my_linked_list = LinkedList()
my_linked_list.append_nodes([0, 1, 2])
my_linked_list.remove_head_node()
assert my_linked_list.get_node_count() == 2
assert my_linked_list.get_head_node().value == 1
assert my_linked_list.get_value_at_position(1) == 2
def test_remove_head_node_length1():
my_linked_list = LinkedList()
my_linked_list.append_node(0)
my_linked_list.remove_head_node()
assert my_linked_list.get_node_count() == 0
assert my_linked_list.get_head_node() is None
assert my_linked_list.get_value_at_position(0) is None
def test_compare_lists_multiple():
linked_list_1 = LinkedList()
linked_list_1.append_nodes([0, 1, 2, 3, 4, 5, 6])
linked_list_2 = LinkedList()
linked_list_2.append_nodes([0, 1, 2, 3, 4, 5, 6])
assert linked_list_1.compare_to(linked_list_2)
linked_list_2.set_value_at_position(10, 0)
assert not linked_list_1.compare_to(linked_list_2)
linked_list_2.remove_head_node()
assert not linked_list_1.compare_to(linked_list_2)
def test_remove_head_node_empty_list():
my_linked_list = LinkedList()
my_linked_list.remove_head_node()
assert my_linked_list.get_node_count() == 0
assert my_linked_list.get_head_node() is None
