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_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_remove_whenElemNotPresent_returnsFalse(self):
sl = SingleLinkedList()
removed = sl.remove(1)
self.assertFalse(removed)