def test_lenRemove(self):
linkedList = DoubleLinkedList()
for i in range(self._len):
linkedList += i
for i in range(self._len):
linkedList += self.value
len = linkedList.len()
linkedList.remove(self.value)
self.assertEqual(len, linkedList.len() + self._len)
def test_lenShift(self):
linkedList = DoubleLinkedList()
for i in range(self._len):
linkedList.unshift(i)
for i in range(self._len):
linkedList.shift()
self.assertEqual(linkedList.len(), 0)
def test_lenPop(self):
linkedList = DoubleLinkedList()
for i in range(self._len):
linkedList.push(i)
for i in range(self._len):
linkedList.pop()
self.assertEqual(linkedList.len(), 0)
def test_emptyPop(self):
"""
Проверяет корректность состояния списка,
ставшего пустым после команды pop
"""
linkedList = DoubleLinkedList()
linkedList.push(1)
linkedList.pop()
self.assertIsNone(linkedList.first())
self.assertIsNone(linkedList.last())
self.assertEqual(linkedList.len(), 0)
def test_len(self):
linkedList = DoubleLinkedList()
for i in range(self._len):
linkedList += i
self.assertEqual(len(linkedList), linkedList.len())
self.assertEqual(linkedList.len(), self._len)
