def loadSuite(self, suite):
        """
        Load tests from the given test case class and create a new reporter to
        use for running it.
        """
        self.loader = pyunit.TestLoader()
        self.suite = self.loader.loadTestsFromTestCase(suite)
        self.reporter = reporter.TestResult()

        Load tests from the given test case class and create a new reporter to
        use for running it.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/trial/test/test_tests.py