old_contents: import unittest
  
  from track import *
  
  @unittest.skip
  class TestTrack(unittest.TestCase):
  
      def test_bpm(self):
          self.assertEqual(get_bpm({'TBPM': '100'}), 100)
          self.assertEqual(get_bpm({'TBPM': '0.0'}), 0)
  
      def test_key(self):
          self.assertEqual(get_key({'TKEY': 'Amin'}), 'Amin')
          self.assertEqual(get_key({'TKEY': ''}), None)
  
new_contents: import unittest
  
  from track import *
  
  class TestTrack(unittest.TestCase):
  
      def test_bpm(self):
          self.assertEqual(get_bpm({'TBPM': '100'}), 100)
          self.assertEqual(get_bpm({'TBPM': '0.0'}), 0)
  
      def test_key(self):
          self.assertEqual(get_key({'TKEY': 'Amin'}), 'Amin')
          self.assertEqual(get_key({'TKEY': ''}), '')
  
subject: test Track