old_contents: from src.google_foobar.P000_template.solution_01 import answer
  import unittest
  
  class TestSolution(unittest.TestCase):
      def testcase_001(self):
          names = []
          expected = []
          self.assertEqual(answer(names), expected)
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  
  from src.google_foobar.P000_template.solution_01 import answer
  
  
  class TestSolution(unittest.TestCase):
      def testcase_001(self):
          names = None
          expected = None
          self.assertEqual(answer(), expected)
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Modify Testcase file format.