new_contents: #!/usr/bin/env python
  
  import unittest
  
  from you_get import *
  
  class TestCommon(unittest.TestCase):
      
      def test_match1(self):
          self.assertEqual(match1('http://youtu.be/1234567890A', r'youtu.be/([^/]+)'), '1234567890A')
          self.assertEqual(match1('http://youtu.be/1234567890A', r'youtu.be/([^/]+)', r'youtu.(\w+)'), ['1234567890A', 'be'])
  
subject: add tests.test_common