import unittest

# unittest.TestCase.assertEqual(20, 20)

class SomaOperador(unittest.TestCase):
    def principal(self):
        self.assertEqual(21, 20)


if __name__ == '__name__':
    unittest.main()

import unittest

# unittest.TestCase.assertEqual(20, 20)

class SomaOperador(unittest.TestCase):
    def principal(self):
        self.assertEqual(21, 20)


if __name__ == '__name__':
    unittest.main()

# unittest.TestCase.assertEqual(20, 20)