old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import unittest
  
  from pychord import Chord
  
  
  class TestChordCreations(unittest.TestCase):
  
      def test_normal_chord(self):
          c = Chord("C")
          self.assertEqual(c.root, "C")
          self.assertEqual(c.quality.quality, "")
  
      def test_invalid_chord(self):
          self.assertRaises(ValueError, Chord, ("H"))
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import unittest
  
  from pychord import Chord
  
  
  class TestChordCreations(unittest.TestCase):
  
      def test_normal_chord(self):
          c = Chord("C")
          self.assertEqual(c.root, "C")
          self.assertEqual(c.quality.quality, "")
  
      def test_invalid_chord(self):
          self.assertRaises(ValueError, Chord, ("H"))
  
      def test_minor_chord(self):
          c = Chord("Am")
          self.assertEqual(c.root, "A")
          self.assertEqual(c.quality.quality, "m")
  
      def test_m75_chord(self):
          c = Chord("Bm7-5")
          self.assertEqual(c.root, "B")
          self.assertEqual(c.quality.quality, "m7-5")
  
      def test_invalid_quality_chord(self):
          self.assertRaises(ValueError, Chord, ("Csus3"))
  
      def test_slash_chord(self):
          c = Chord("F/G")
          self.assertEqual(c.root, "F")
          self.assertEqual(c.quality.quality, "")
          self.assertEqual(c.on, "G")
  
      def test_minor_slash_chord(self):
          c = Chord("Dm/G")
          self.assertEqual(c.root, "D")
          self.assertEqual(c.quality.quality, "m")
          self.assertEqual(c.on, "G")
  
      def test_invalid_slash_chord(self):
          self.assertRaises(ValueError, Chord, ("C/H"))
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add tests