How to use the ytcc.storage.Storage function in ytcc

def test_valid(self):
        video_id = 'jNQXAC9IVRw'
        hashed_video_id = hashlib.md5(video_id.encode('utf-8')).hexdigest()
        storage = Storage(video_id)
        expected = 'subtitle_{0}.en.vtt'.format(hashed_video_id)
        self.assertEqual(expected, storage.get_file_path())

def test_remove_file(self, mock):
        file_path = 'subtitle_' + \
            hashlib.md5('v2309jfGew'.encode('utf-8')).hexdigest() + '.en.vtt'
        video_id = 'v2309jfGew'
        storage = Storage(video_id)
        storage.remove_file()
        mock.assert_called_with(file_path)

def get_captions(self, video_id: str, language: str = 'en') -> str:
        result = self.get_result(video_id, language)

        if result != 0:
            raise Exception(
                'Unable to download and extract captions: {0}'.format(result))

        storage = Storage(video_id, language)
        file_path = storage.get_file_path()
        with open(file_path) as f:
            output = self.get_captions_from_output(f.read(), language)
        storage.remove_file()
        return output

def get_captions(self) -> str:

        output = ''
        for url in self.urls:
            result = self.get_result(url)
            if result != 0:
                raise Exception(
                    'Unable to download and extract captions: {0}'.format(result))
            storage = Storage(url)
            file_path = storage.get_file_path()
            try:
                with open(file_path) as f:
                    output += self.get_captions_from_output(f.read(), url)
                    storage.remove_file()
            except FileNotFoundError:
                if len(self.urls) == 1:
                    raise NoCaptionsException("no captions found.")
                else:
                    print("WARNING: no captions found for {}".format(url))

        # remove final newline
        if len(output) > 0 and output[-1] == '\n':
            output = output[:-1]
        return output