new_contents: from unittest import TestCase, main
  
  from timer import Timer
  
  def a():
      pass
  
  def b():
      pass
  
  class TimingTestCase(TestCase):
      def test_single_function(self):
          t = Timer(a)
          t.run()
          self.assertIn('0.00', t.output()) # This should run fast
  
      def test_multiple_functions(self):
          t = Timer([a, b])
          t.run()
          self.assertIn('0.00', t.output()) # This should run fast
  
  if __name__ == '__main__':
      main()
  
  
subject: add first unittests