Python DoubleLinked примеры использования

Пример #1

def test_remove_wrong():
    linked = DoubleLinked()
    linked.insert("Fred")
    linked.insert("Bob")
    linked.insert("Joe")
    with pytest.raises(ValueError):
        linked.remove("Sue")

Пример #2

def test_multi():
    linked = DoubleLinked()
    linked.insert("Fred")
    linked.insert("Bob")
    linked.insert("Joe")
    assert linked.first_item.val == "Joe"

Пример #3

def test_remove_empty():
    linked = DoubleLinked()
    with pytest.raises(AttributeError):
        linked.remove("Bob")

Пример #4

def test_remove_one():
    linked = DoubleLinked()
    linked.insert("Bob")
    linked.remove("Bob")
    with pytest.raises(AttributeError):
        linked.remove("Bob")

Пример #5

def test_shift_one():
    linked = DoubleLinked()
    linked.insert("Bob")
    assert linked.shift() == "Bob"

Пример #6

def test_shift_empty():
    linked = DoubleLinked()
    with pytest.raises(ValueError):
        linked.shift()

Пример #7

def test_insert_one():
    linked = DoubleLinked()
    linked.insert("Bob")
    assert linked.first_item.val == "Bob"

Пример #8

def test_pop_empty():
    linked = DoubleLinked()
    with pytest.raises(ValueError):
        linked.pop()

Пример #9

def test_pop_one():
    linked = DoubleLinked()
    linked.insert("Bob")
    assert linked.pop() == "Bob"

Пример #10

def test_append_multi():
    linked = DoubleLinked()
    linked.append("Fred")
    linked.append("Bob")
    linked.append("Joe")
    assert linked.last_item.val == "Joe"

Пример #11

def test_append_one():
    linked = DoubleLinked()
    linked.append("Bob")
    assert linked.last_item.val == "Bob"