new_contents: #!/usr/bin/env python3
  
  import multiplier
  import unittest
  
  class TestMultiplier(unittest.TestCase):
      def setUp(self):
          pass
  
      def test_multiply(self):
          a = 0
          b = 0
          expected_result = 0
          # module multiplier, class multiplier, method multiply(a, b)
          result = multiplier.multiplier.multiply(a, b)
          self.assertEqual(expected_result, result,
                           'multiply({}, {}) expected {} but got {}'.format(a, b, expected_result, result))
  
          a = 1
          b = 1
          expected_result = 1
          result = multiplier.multiplier.multiply(a, b)
          self.assertEqual(expected_result, result,
                           'multiply({}, {}) expected {} but got {}'.format(a, b, expected_result, result))
  
      def test_multiply_iterative(self):
          a = 7
          b = 9
          expected_result = 63
          # module multiplier, class multiplier, method multiply_iterative(a, b)
          result = multiplier.multiplier.multiply_iterative(a, b)
          self.assertEqual(expected_result, result,
                           'multiply_iterative({}, {}) expected {} but got {}'.format(a, b, expected_result, result))
  
  if __name__ == "__main__": unittest.main()
  
subject: Add file test-multiplier.py with class TestMultiplier to unit test class multiplier.