def test_forward_sum(self):
out = LinkedList()
out.first = forward_sum(self.x.first, self.y.first)
self.assertEqual(str(out), str(self.forward))
def test_partation_merge(self):
l = LinkedList()
l.first = partation_merging(self.node, self.val)
self.assertEqual(str(l), 'Linked list: [1->0->2->3->2]')
def test_reverse_sum(self):
out = LinkedList()
out.first = reverse_sum(self.x.first, self.y.first, 0)
self.assertEqual(str(out), str(self.reverse))
