def test_should_not_perform_mutation_on_options_when_normalize_options_is_called(self, normalize_message): normalize_message.return_value = 'normalized message' options_with_message = self.MockedOptions() options_with_message.message = 'some message' actual_options = normalize_options(options_with_message) normalize_message.assert_called_with('some message') self.assertTrue(actual_options is not options_with_message, 'performed mutation on the options instead of creating a new object')
def test_should_execute_normalize_message_when_message_option_is_given(self, normalize_message): normalize_message.return_value = 'normalized message' options_with_message = self.MockedOptions() options_with_message.message = 'some message' actual_options = normalize_options(options_with_message) normalize_message.assert_called_with('some message') self.assertEqual(actual_options.message, 'normalized message')