def test_noNext(self):
""" Test that None is returned when there is no next item in the list """
expected = None
item = 2
l = KaoList([1, item])
self.assertEqual(expected, l.next(item))
def test_noPrevious(self):
""" Test that None is returned when there is no previous item in the list """
expected = None
item = 2
l = KaoList([item, 1])
self.assertEqual(expected, l.previous(item))
def test_hasNext(self):
""" Test that the next element is returned when it exists """
expected = 1
item = 2
l = KaoList([item, expected])
self.assertEqual(expected, l.next(item))
def test_hasPrevious(self):
""" Test that the previous element is returned when it exists """
expected = 1
item = 2
l = KaoList([expected, item])
self.assertEqual(expected, l.previous(item))
