new_contents: from __future__ import unicode_literals
  import linked_list
  
  # def func(x):
  #     return x + 1
  
  # def tdest_answer():
  #     assert func(3) == 5
  
  
  # init
  
  a = linked_list.LinkedList()
  
  
  def test_size():
      assert a.size is 0
  
  
  def test_head():
      assert a.head is None
  
  
  def test_init():
      assert type(a) is linked_list.LinkedList
  
  
  
subject: Add test file