'Test that credentials are persisted to a config file'

def test_write_config(self):

    self.credentials_manager.username = self.aws_access_key
    self.credentials_manager.password = self.aws_secret_key
    self.credentials_manager.save_credentials()
    self.config.load()
    self.assertEqual(self.aws_access_key, self.config.get('aws-access-key'))
    self.assertEqual(self.aws_secret_key, self.keyring.get_password('aws', '123'))
