def test_returnsFileLogObserver(self):
        with StringIO() as fileHandle:
            observer = textFileLogObserver(fileHandle)
            self.assertIsInstance(observer, FileLogObserver)
If an L{Enhancement} subclass requires a particular attribute,
dataset/ETHPy150Open twisted/twisted/twisted/logger/test/test_file.py/TextFileLogObserverTests.test_returnsFileLogObserver--crossover with--dataset/ETHPy150Open twisted/imaginary/imaginary/test/test_enhancement.py/EnhancementTests.test_createForAllowNoneFalse