def test_del(self):
list_1 = DoubleLinkedList()
list_1.push(1)
list_1.push(2)
list_1.push(2)
list_1.delete(2)
self.assertEqual(list_1.len(), 2)
def test_delete_elem_only_multi(self):
test_list = DoubleLinkedList()
for i in range(5):
test_list.push(2)
self.assertEqual(test_list.len(), 5)
self.assertEqual(test_list.contains(2), 5)
test_list.delete(2)
self.assertEqual(test_list.len(), 0)
self.assertEqual(test_list.contains(2), 0)
def test_delete_elem_multi(self):
test_list = DoubleLinkedList()
for i in range(3):
test_list.push(i)
test_list.push(1)
for i in range(3):
test_list.push(i)
self.assertEqual(test_list.len(), 7)
self.assertEqual(test_list.contains(1), 3)
test_list.delete(1)
self.assertEqual(test_list.len(), 4)
self.assertEqual(test_list.contains(1), 0)
def test_delete_elem_only(self):
test_list = DoubleLinkedList()
test_list.push("test")
self.assertEqual(test_list.len(), 1)
test_list.delete("test")
self.assertEqual(test_list.len(), 0)
def test_delete_empty(self):
test_list = DoubleLinkedList()
self.assertEqual(test_list.delete("test"), "no such element")