def METHOD_NAME(self, global_environment):
    """
    Run the test cases on ``global_environment``, saving the results in 
    ``self.test_case_results``.
    Arguments:
        ``global_environment`` (``dict``): result of executing a Python notebook/script
    """
    for i, test_case in enumerate(self.test_cases):
        passed, result = run_doctest(self.name + ' ' + str(i), test_case.body, global_environment)
        if passed:
            result = '✅ Test case passed'
        else:
            result = '❌ Test case failed\n' + result
        self.test_case_results.append(TestCaseResult(
            test_case = test_case,
            message = result,
            passed = passed,
        ))