def test_peek_first_empty(self):
_list = SinglyLinkedList()
self.assertIsNone(_list.peek_first())
class TestSinglyLinkedList(unittest.TestCase):
def setUp(self) -> None:
self.list = SinglyLinkedList()
self.list.add_last(5)
self.list.add_last(10)
self.list.add_last(7)
self.list.add_last(8)
self.list.add_last(1)
def test_length_of_list(self):
self.assertEqual(len(self.list), 5)
self.list.remove_last()
self.assertEqual(len(self.list), 4)
self.list.remove_first()
self.assertEqual(len(self.list), 3)
self.list.remove(1)
self.assertEqual(len(self.list), 2)
self.list.add_last(2)
self.assertEqual(len(self.list), 3)
self.list.add_last(20)
self.assertEqual(len(self.list), 4)
self.list.add(50, 3)
self.assertEqual(len(self.list), 5)
def test_str_of_list(self):
self.assertEqual(str(self.list), '[5, 10, 7, 8, 1]')
def test_iterator_list(self):
self.assertEqual([x for x in self.list], [5, 10, 7, 8, 1])
def test_add_first_empty(self):
_list = SinglyLinkedList()
_list.add_first(10)
self.assertEqual([x for x in _list], [10])
def test_add_last_empty(self):
_list = SinglyLinkedList()
_list.add_last(10)
self.assertEqual([x for x in _list], [10])
def test_add_last_values(self):
self.list.add_last(15)
self.assertEqual([x for x in self.list], [5, 10, 7, 8, 1, 15])
def test_add_first_values(self):
self.list.add_first(15)
self.assertEqual([x for x in self.list], [15, 5, 10, 7, 8, 1])
def test_remove_last(self):
self.list.remove_last()
self.list.remove_last()
self.list.remove_last()
self.list.remove_last()
self.list.remove_last()
self.assertEqual([x for x in self.list], [])
def test_remove_last_from_empty(self):
empty_list = SinglyLinkedList()
with self.assertRaises(RuntimeError):
empty_list.remove_last()
def test_remove_first(self):
self.list.remove_first()
self.assertEqual([x for x in self.list], [10, 7, 8, 1])
def test_remove_first_from_empty(self):
empty_list = SinglyLinkedList()
with self.assertRaises(RuntimeError):
empty_list.remove_first()
def test_is_not_empty(self):
self.assertFalse(self.list.is_empty)
def test_is_empty(self):
_list = SinglyLinkedList()
self.assertTrue(_list.is_empty)
def test_peek_first(self):
self.assertEqual(self.list.peek_first(), 5)
def test_peek_first_empty(self):
_list = SinglyLinkedList()
self.assertIsNone(_list.peek_first())
def test_peek_last(self):
self.assertEqual(self.list.peek_last(), 1)
def test_peek_last_empty(self):
_list = SinglyLinkedList()
self.assertIsNone(_list.peek_last())
def test_add_at_index(self):
self.list.add(20, 2)
self.assertEqual([x for x in self.list], [5, 10, 20, 7, 8, 1])
def test_add_at_index_too_low(self):
with self.assertRaises(IndexError):
self.list.add(10, -1)
def test_add_at_index_too_high(self):
with self.assertRaises(IndexError):
self.list.add(10, 10)
def test_add_at_index_first(self):
_list = SinglyLinkedList()
_list.add(1, 0)
self.assertEqual([x for x in _list], [1])
def test_add_at_index_last(self):
_list = SinglyLinkedList()
_list.add_last(1)
_list.add_last(10)
_list.add(5, 2)
self.assertEqual([x for x in _list], [1, 10, 5])
def test_remove_at_index(self):
data = self.list.remove(2)
self.assertEqual(data, 7)
self.assertEqual([x for x in self.list], [5, 10, 8, 1])
def test_remove_at_index_low(self):
_list = SinglyLinkedList()
with self.assertRaises(IndexError):
_list.remove(-1)
def test_remove_at_index_high(self):
_list = SinglyLinkedList()
with self.assertRaises(IndexError):
_list.remove(10)
def test_remove_at_index_last(self):
data = self.list.remove(4)
self.assertEqual(data, 1)
self.assertEqual([x for x in self.list], [5, 10, 7, 8])
def test_remove_at_index_first(self):
data = self.list.remove(0)
self.assertEqual(data, 5)
self.assertEqual([x for x in self.list], [10, 7, 8, 1])
def test_clear(self):
self.list.clear()
self.assertEqual([x for x in self.list], [])
def test_peek_at_index(self):
data = self.list.peek(2)
self.assertEqual(data, 7)
def test_peek_at_index_first(self):
data = self.list.peek(0)
self.assertEqual(data, 5)
def test_peek_at_index_last(self):
data = self.list.peek(4)
self.assertEqual(data, 1)
def test_peek_at_index_low(self):
with self.assertRaises(IndexError):
self.list.peek(-1)
def test_peek_at_index_high(self):
with self.assertRaises(IndexError):
self.list.peek(10)
def test_index_of(self):
index = self.list.indexof(8)
self.assertEqual(index, 3)
def test_index_of_not_in_list(self):
index = self.list.indexof(100)
self.assertEqual(index, -1)
def test_index_of_head(self):
index = self.list.indexof(5)
self.assertEqual(index, 0)
def test_index_of_empty(self):
_list = SinglyLinkedList()
index = _list.indexof(4)
self.assertEqual(index, -1)