def test_interface(self) -> None:
    '\n        A L{FileLogObserver} returned by L{jsonFileLogObserver} is an\n        L{ILogObserver}.\n        '
    with StringIO() as fileHandle:
        observer = jsonFileLogObserver(fileHandle)
        try:
            verifyObject(ILogObserver, observer)
        except BrokenMethodImplementation as e:
            self.fail(e)
A L{FileLogObserver} returned by L{jsonFileLogObserver} is an
L{ILogObserver}.
def test_interface(self) -> None:
    '\n        A L{FileLogObserver} returned by L{jsonFileLogObserver} is an\n        L{ILogObserver}.\n        '
    with StringIO() as fileHandle:
        observer = jsonFileLogObserver(fileHandle)
        try:
            verifyObject(ILogObserver, observer)
        except BrokenMethodImplementation as e:
            self.fail(e)