def test_add_panda(self): panda = Panda("Ivo", "*****@*****.**", "male") soc_net = PandaSocialNetwork() soc_net.add_panda(panda) lst = soc_net.get_pandas_list() panda1 = lst[0] self.assertEqual(str(panda1), 'Ivo') try: soc_net.add_panda(panda) except ValueError: bra = 'this is an error' self.assertEqual(bra, 'this is an error')