How to use the lineflow.download.get_cache_root function in lineflow

def setUp(self):
        self.default_cache_root = download.get_cache_root()
        self.temp_dir = tempfile.mkdtemp()
        download.set_cache_root(self.temp_dir)

def setUp(self):
        self.default_cache_root = download.get_cache_root()
        self.temp_dir = tempfile.mkdtemp()
        download.set_cache_root(self.temp_dir)

def setUp(self):
        self.default_cache_root = download.get_cache_root()
        self.temp_dir = tempfile.mkdtemp()
        download.set_cache_root(self.temp_dir)
        self.patcher = mock.patch('lineflow.datasets.text_classification.sys.maxsize',
                                  int(sys.float_info.max))
        self.patcher.start()

def setUp(self):
        self.default_cache_root = download.get_cache_root()
        self.temp_dir = tempfile.mkdtemp()
        download.set_cache_root(self.temp_dir)

def setUp(self):
        self.default_cache_root = download.get_cache_root()
        self.temp_dir = tempfile.mkdtemp()
        download.set_cache_root(self.temp_dir)

def setUp(self):
        self.default_cache_root = download.get_cache_root()
        self.temp_dir = tempfile.mkdtemp()
        download.set_cache_root(self.temp_dir)

def test_get_cache_directory(self):
        root = download.get_cache_root()
        path = download.get_cache_directory('test', False)
        self.assertEqual(path, os.path.join(root, 'test'))