import unittest


class TestClass4(unittest.TestCase):

    def test_case_1(self):
       self.assertTrue('appel'.islower())

class TestClass1(unittest.TestCase):

    def test_case_1(self):
       self.assertEqual('John Smith'.split(), ['John', 'Smith'])

class TestClass2(unittest.TestCase):

    def test_case_1(self):
       self.assertEqual('3.9'.split('.'), ['3', '9'])

class TestClass3(unittest.TestCase):

    def test_case_1(self):
       self.assertEqual('#'.join(['sport', 'gym']), 'sport#gym')


if __name__ == '__main__':
    unittest.main(verbosity=2)