old_contents: from __future__ import unicode_literals
  import pytest
  
  from linked_list import LinkedList
  from queue import Queue
  
  #  (Input, expected) for well constructed instantiation arguments,
  #  and one subsequent dequeue
  valid_constructor_args_dequeue = [
      ([1,2,3], 1),
      ([[1,2,3,], "string" ], [1,2,3]),
      ("string", 's')
  ]
  
  # Invalid instantiation arguments
  invalid_constructor_args = [
      (None),
      (1),
      (4.5235)
  ]
  
  
  @pytest.mark.parametrize("input,deque",valid_constructor_args_dequeue)
  def test_valid_contructor(input, deque):
      """Test valid constructor using by dequeuing after instantiation"""
      assert Queue(input).dequeue() == deque
  
  
  def test_empty_constructor():
      """Test valid empty constructor via dequeuing after instantiation"""
      with pytest.raises(IndexError):
          Queue(()).dequeue()
  
  
  @pytest.mark.parametrize("input", invalid_constructor_args)
  def test_invalid_constructor(input):
      """Test invalid constuctor arguments"""
      with pytest.raises(TypeError):
          Queue(input)
  
  
  def test_enqueue():
      """Fill an empty contructor argument and assert len, deque)"""
      filling_this = Queue(())
      for i in xrange(40):
          filling_this.enqueue(i)
      assert len(filling_this) == 40
      assert filling_this.dequeue() == 0
  
new_contents: from __future__ import unicode_literals
  import pytest
  
  from queue import Queue
  
  #  (Input, expected) for well constructed instantiation arguments,
  #  and one subsequent dequeue
  valid_constructor_args_dequeue = [
      ([1, 2, 3], 1),
      ([[1, 2, 3], "string"], [1, 2, 3]),
      ("string", 's')
  ]
  
  # Invalid instantiation arguments
  invalid_constructor_args = [
      (None),
      (1),
      (4.5235)
  ]
  
  
  @pytest.mark.parametrize("input,deque", valid_constructor_args_dequeue)
  def test_valid_contructor(input, deque):
      """Test valid constructor using by dequeuing after instantiation"""
      assert Queue(input).dequeue() == deque
  
  
  def test_empty_constructor():
      """Test valid empty constructor via dequeuing after instantiation"""
      with pytest.raises(IndexError):
          Queue(()).dequeue()
  
  
  @pytest.mark.parametrize("input", invalid_constructor_args)
  def test_invalid_constructor(input):
      """Test invalid constuctor arguments"""
      with pytest.raises(TypeError):
          Queue(input)
  
  
  def test_enqueue():
      """Fill an empty contructor argument and assert len, deque)"""
      filling_this = Queue(())
      for i in xrange(40):
          filling_this.enqueue(i)
      assert len(filling_this) == 40
      assert filling_this.dequeue() == 0
  
subject: Fix style