def test_equal_10(self):
     self.assertEqual(caesar_crypto_encode('Hello world!', 0),
                      'Hello world!')
 def test_equal_1(self):
     self.assertEqual(caesar_crypto_encode('Et tu, Brute?', 3),
                      'Hw wx, Euxwh?')
 def test_equal_9(self):
     self.assertEqual(caesar_crypto_encode('ksdjai8983hdk?}{', 15),
                      'zHsypx8983wsz?}{')
 def test_equal_8(self):
     self.assertEqual(caesar_crypto_encode('eBIIL TLOIA!', -127),
                      'Hello world!')
 def test_equal_6(self):
     self.assertEqual(caesar_crypto_encode('   ', 10), '')
 def test_equal_5(self):
     self.assertEqual(caesar_crypto_encode(None, 10), '')
 def test_equal_3(self):
     self.assertEqual(caesar_crypto_encode('123,.)(!?', 10), '123,.)(!?')