def test_add_updatesTailCorrectly(self):
sl = SingleLinkedList()
sl.add(1)
sl.add(2)
sl.add(100)
self.assertEqual(sl.tail.value, 100)
def test_remove_whenElemIsTail_returnsRemovedNode(self):
sl = SingleLinkedList()
sl.add(1)
sl.add(2)
sl.add(3)
removed = sl.remove(3)
self.assertEqual(removed.value, 3)
def test_reverse_whenListReversed_returnsAppropriateHeadAndTail(self):
sl = SingleLinkedList()
sl.add(1)
sl.add(2)
sl.add(3)
sl.reverse()
self.assertEqual(sl.head.value, 3)
self.assertEqual(sl.tail.value, 1)
def test_search_whenItemIsAvailable_returnsNode(self):
sl = SingleLinkedList()
sl.add(1)
sl.add(2)
item1 = sl.search(1)
item2 = sl.search(2)
self.assertTrue(item1.value == 1)
self.assertTrue(item2.value == 2)
def test_remove_whenElemInMiddle_returnsRemovedNode(self):
sl = SingleLinkedList()
sl.add(11)
sl.add(32)
sl.add(44)
sl.add(99)
removedNode = sl.remove(44)
self.assertTrue(removedNode.value, 44)
def test_search_whenItemIsNotAvailable_returnsFalse(self):
sl = SingleLinkedList()
sl.add(1)
item2 = sl.search(2)
self.assertEqual(item2, False)
def test_add_addingFirstElem_savesAsHead(self):
sl = SingleLinkedList()
sl.add(1)
self.assertEqual(sl.head.value, 1)
def test_add_addingSecondElem_hasLengthOfTwo(self):
sl = SingleLinkedList()
sl.add(1)
sl.add(2)
self.assertEqual(len(sl), 2)
