registers as test as expected failure

        :param test: test to register
        :param err: error the test gave

def addExpectedFailure(self, test, err):
        """
        registers as test as expected failure

        :param test: test to register
        :param err: error the test gave
        """
        super().addExpectedFailure(test, err)
        self.test_info(test)
        self._call_test_results('addExpectedFailure', test, err)