run tests in test_suite

        Args:
            test_suite: unittest.TestSuite()

        Returns:
            list: tests_results

def _run_suite(self, test_suite):
        """ run tests in test_suite

        Args:
            test_suite: unittest.TestSuite()

        Returns:
            list: tests_results

        """
        tests_results = []

        for testcase in test_suite:
            testcase_name = testcase.config.get("name")
            logger.log_info("Start to run testcase: {}".format(testcase_name))

            result = self.unittest_runner.run(testcase)
            tests_results.append((testcase, result))

        return tests_results