def test_first(self):
doubleLinkedList = DoubleLinkedList()
doubleLinkedList.push("test1")
doubleLinkedList.push(1)
doubleLinkedList.push("test1")
doubleLinkedList.delete("test1")
assert (doubleLinkedList.first().elem == 1)
def test_delete2(self):
doubleLinkedList = DoubleLinkedList()
doubleLinkedList.push(1)
doubleLinkedList.push(1)
doubleLinkedList.push(1)
doubleLinkedList.delete(1)
assert (doubleLinkedList.pop() == None and doubleLinkedList.len() == 0
and doubleLinkedList.first() == None
and doubleLinkedList.last() == None)
def test_first_when_empty(self):
"""Test return first Item in list, when list is empty"""
l_list = DoubleLinkedList()
with self.assertRaises(Exception) as context:
l_list.first()
self.assertTrue('Empty list' in str(context.exception))
def test_first(self):
"""Test return first Item in list"""
l_list = DoubleLinkedList()
l_list.push(1234)
l_list.push(12)
self.assertEqual(l_list.get_list()[0], l_list.first())
