class DeleteFromMiddleDescListWithMultipleValuesTestCase(unittest.TestCase):
def setUp(self) -> None:
self.ol = OrderedList(False)
for i in range(0, 6):
self.ol.add(i)
def test(self):
self.assertEqual(6, self.ol.len())
self.assertEqual(6, self.ol.len_reverse())
nodes = []
for i in self.ol.get_all():
nodes.append(i.value)
self.assertListEqual(nodes, [5, 4, 3, 2, 1, 0])
self.ol.delete(3)
self.assertEqual(5, self.ol.len())
self.assertEqual(5, self.ol.len_reverse())
nodes = []
for i in self.ol.get_all():
nodes.append(i.value)
self.assertListEqual(nodes, [5, 4, 2, 1, 0])
node_4 = self.ol.find(4)
node_2 = self.ol.find(2)
self.assertEqual(node_2, node_4.next)
self.assertEqual(node_4, node_2.prev)
class DeleteFromEndDescListWithMultipleValuesTestCase(unittest.TestCase):
def setUp(self) -> None:
self.ol = OrderedList(False)
for i in range(0, 6):
self.ol.add(i)
def test(self):
self.assertEqual(6, self.ol.len())
self.assertEqual(6, self.ol.len_reverse())
self.assertEqual(0, self.ol.tail.value)
self.assertEqual(1, self.ol.tail.prev.value)
self.assertEqual(0, self.ol.tail.prev.next.value)
self.assertIsNone(self.ol.tail.next)
self.ol.delete(0)
self.ol.delete(1)
self.ol.delete(2)
self.assertEqual(3, self.ol.len())
self.assertEqual(3, self.ol.len_reverse())
self.assertEqual(3, self.ol.tail.value)
self.assertEqual(4, self.ol.tail.prev.value)
self.assertEqual(3, self.ol.tail.prev.next.value)
self.assertIsNone(self.ol.tail.next)
self.ol.delete(3)
self.ol.delete(4)
self.ol.delete(5)
self.assertEqual(0, self.ol.len())
self.assertEqual(0, self.ol.len_reverse())
self.assertIsNone(self.ol.head)
self.assertIsNone(self.ol.tail)
def test_delete_descending_begin(self):
ol = OrderedList(asc=False)
items = [4, 6, 2, 8, 5]
for item in items:
ol.add(item)
items.sort(reverse=True)
items.remove(2)
ol.delete(2)
self.assertEqual([node.value for node in ol.get_all()], items)
def test_delete_ascending_end(self):
ol = OrderedList(asc=True)
items = [4, 6, 2, 8, 5]
for item in items:
ol.add(item)
items.sort()
items.remove(8)
ol.delete(8)
self.assertEqual([node.value for node in ol.get_all()], items)
class DeleteFromEmptyListTestCase(unittest.TestCase):
def test_asc(self):
self.ol = OrderedList(True)
self.assertEqual(0, self.ol.len())
self.assertEqual(0, self.ol.len_reverse())
self.assertIsNone(self.ol.delete(30))
self.assertEqual(0, self.ol.len())
self.assertEqual(0, self.ol.len_reverse())
def test_desc(self):
self.ol = OrderedList(False)
self.assertEqual(0, self.ol.len())
self.assertEqual(0, self.ol.len_reverse())
self.assertIsNone(self.ol.delete(30))
self.assertEqual(0, self.ol.len())
self.assertEqual(0, self.ol.len_reverse())
class DeleteFromMiddleAscListWithMultipleValuesTestCase(unittest.TestCase):
def setUp(self) -> None:
self.ol = OrderedList(True)
for i in range(0, 6):
self.ol.add(i)
def test(self):
self.assertEqual(6, self.ol.len())
self.assertEqual(6, self.ol.len_reverse())
self.assertEqual(0, self.ol.head.value)
self.assertEqual(5, self.ol.tail.value)
self.assertIsNone(self.ol.head.prev)
self.assertIsNone(self.ol.tail.next)
self.ol.delete(2)
self.ol.delete(4)
self.assertEqual(4, self.ol.len())
self.assertEqual(4, self.ol.len_reverse())
self.assertEqual(self.ol.find(3).prev, self.ol.find(1))
self.assertEqual(self.ol.find(3).next, self.ol.find(5))
class DeleteFromListWithSingleValueTestCase(unittest.TestCase):
def setUp(self) -> None:
self.ol = OrderedList(True)
self.ol.add(1)
def test(self):
self.assertEqual(1, self.ol.len())
self.assertEqual(1, self.ol.len_reverse())
self.assertEqual(1, self.ol.head.value)
self.assertEqual(1, self.ol.tail.value)
self.assertIsNone(self.ol.head.prev)
self.assertIsNone(self.ol.head.next)
self.assertIsNone(self.ol.tail.next)
self.assertIsNone(self.ol.tail.prev)
self.ol.delete(1)
self.assertEqual(0, self.ol.len())
self.assertEqual(0, self.ol.len_reverse())
self.assertIsNone(self.ol.head)
self.assertIsNone(self.ol.tail)
class DeleteFromHeadAscListWithMultipleValuesTestCase(unittest.TestCase):
def setUp(self) -> None:
self.ol = OrderedList(True)
for i in range(0, 6):
self.ol.add(i)
def test(self):
self.assertEqual(6, self.ol.len())
self.assertEqual(6, self.ol.len_reverse())
self.assertEqual(0, self.ol.head.value)
self.assertEqual(1, self.ol.head.next.value)
self.assertIsNone(self.ol.head.prev)
self.ol.delete(0)
self.assertEqual(5, self.ol.len())
self.assertEqual(5, self.ol.len_reverse())
self.assertEqual(1, self.ol.head.value)
self.assertEqual(2, self.ol.head.next.value)
self.assertEqual(1, self.ol.head.next.prev.value)
self.assertIsNone(self.ol.head.prev)
