def setUp(self):
        """
        Create a file used to test L{util.FilePager}.
        """
        self.filename = self.mktemp()
        with open(self.filename, 'wb') as f:
            f.write(bigString)

        Create a file used to test L{util.FilePager}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/spread/test/test_pb.py