class SinglyLinkedListTests(unittest.TestCase): def setUp(self): self.list = SinglyLinkedList() def test_add_to_tail(self): self.list.add_to_tail(1) self.assertEqual(self.list.tail.value, 1) self.assertEqual(self.list.head.value, 1) self.list.add_to_tail(2) self.assertEqual(self.list.tail.value, 2) self.assertEqual(self.list.head.value, 1) def test_contains(self): self.list.add_to_tail(1) self.list.add_to_tail(2) self.list.add_to_tail(5) self.list.add_to_tail(10) self.assertTrue(self.list.contains(10)) self.assertTrue(self.list.contains(2)) self.assertFalse(self.list.contains(1000)) def test_remove_head(self): self.list.add_to_tail(10) self.list.add_to_tail(20) self.assertEqual(self.list.remove_head(), 10) self.assertFalse(self.list.contains(10)) self.assertEqual(self.list.remove_head(), 20) self.assertFalse(self.list.contains(20)) self.list.add_to_tail(10) self.assertEqual(self.list.remove_head(), 10) self.assertIsNone(self.list.head) self.assertIsNone(self.list.tail) self.assertIsNone(self.list.remove_head()) def test_get_max(self): self.assertIsNone(self.list.get_max()) self.list.add_to_tail(100) self.assertEqual(self.list.get_max(), 100) self.list.add_to_tail(55) self.assertEqual(self.list.get_max(), 100) self.list.add_to_tail(101) self.assertEqual(self.list.get_max(), 101)
def test_contains(self): llist = SinglyLinkedList() llist.insert_first(0) self.assertTrue(llist.contains(0)) self.assertFalse(llist.contains(1))