def test_remove_wrong(): linked = DoubleLinked() linked.insert("Fred") linked.insert("Bob") linked.insert("Joe") with pytest.raises(ValueError): linked.remove("Sue")
def test_multi(): linked = DoubleLinked() linked.insert("Fred") linked.insert("Bob") linked.insert("Joe") assert linked.first_item.val == "Joe"
def test_remove_empty(): linked = DoubleLinked() with pytest.raises(AttributeError): linked.remove("Bob")
def test_remove_one(): linked = DoubleLinked() linked.insert("Bob") linked.remove("Bob") with pytest.raises(AttributeError): linked.remove("Bob")
def test_shift_one(): linked = DoubleLinked() linked.insert("Bob") assert linked.shift() == "Bob"
def test_shift_empty(): linked = DoubleLinked() with pytest.raises(ValueError): linked.shift()
def test_insert_one(): linked = DoubleLinked() linked.insert("Bob") assert linked.first_item.val == "Bob"
def test_pop_empty(): linked = DoubleLinked() with pytest.raises(ValueError): linked.pop()
def test_pop_one(): linked = DoubleLinked() linked.insert("Bob") assert linked.pop() == "Bob"
def test_append_multi(): linked = DoubleLinked() linked.append("Fred") linked.append("Bob") linked.append("Joe") assert linked.last_item.val == "Joe"
def test_append_one(): linked = DoubleLinked() linked.append("Bob") assert linked.last_item.val == "Bob"