def test_react(self):
        self.assertIs(
            task.react,
            FlockerScriptRunner(script=None, options=None)._react
        )
`FlockerScriptRunner._react` is ``task.react`` by default
dataset/ETHPy150Open ClusterHQ/flocker/flocker/common/test/test_script.py/FlockerScriptRunnerInitTests.test_react