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)