new_contents: import datetime
  
  from components.people.utils import calculate_age, calculate_average_age
  
  
  def test_calculate_age():
      birthdate = datetime.date.today() - datetime.timedelta(days=731)
      target = datetime.date.today() - datetime.timedelta(days=365)
      assert calculate_age(birthdate) == 2
      assert calculate_age(birthdate, target) == 1
  
  
  def test_cacluate_average_age():
      birthdates = [
          datetime.date.today() - datetime.timedelta(days=731),
          datetime.date.today() - datetime.timedelta(days=366)
      ]
      assert calculate_average_age(birthdates) == 1.5
  
subject: Test our age calculation utilities.