old_contents: """
  Name: Paul Briant
  Date: 11/22/16
  Class: Introduction to Python
  Session: 08
  Assignment: circle lab
  
  Description:
  Tests for Circle lab
  """
  
  # -------------------------------Imports----------------------------------------
  import math
  from circle import Circle
  # -------------------------------Functions--------------------------------------
  
  
  def test_radius():
      c = Circle(4)
      assert c.radius == 4
  
  
  def test_diameter():
      c = Circle(5)
      assert c.diameter == 10
  
  
  def test_change_radius():
      c = Circle(5)
      c.radius = 2
      assert c.diameter == 4
  
  
  def test_change_diameter():
      c = Circle(5)
      c.diameter = 12
      assert c.diameter == 12
      assert c.radius == 6
  
  
  def test_area():
      """
  
      """
  
new_contents: """
  Name: Paul Briant
  Date: 11/22/16
  Class: Introduction to Python
  Session: 08
  Assignment: circle lab
  
  Description:
  Tests for Circle lab
  """
  
  # -------------------------------Imports----------------------------------------
  import math
  from circle import Circle
  # -------------------------------Functions--------------------------------------
  
  
  def test_radius():
      c = Circle(4)
      assert c.radius == 4
  
  
  def test_diameter():
      c = Circle(5)
      assert c.diameter == 10
  
  
  def test_change_radius():
      c = Circle(5)
      c.radius = 2
      assert c.diameter == 4
  
  
  def test_change_diameter():
      c = Circle(5)
      c.diameter = 12
      assert c.diameter == 12
      assert c.radius == 6
  
  
  def test_area():
      """
      Verify area of circle
      """
      c = Circle(5)
      assert c.area == 25
  
subject: Add test for area property of circle.