How to use the cachecontrol.CacheController function in CacheControl

def setup(self):
        self.c = CacheController(DictCache(), serializer=NullSerializer())

def test_cache_response_no_store(self):
        resp = Mock()
        cache = DictCache({self.url: resp})
        cc = CacheController(cache)

        cache_url = cc.cache_url(self.url)

        resp = self.resp({"cache-control": "no-store"})
        assert cc.cache.get(cache_url)

        cc.cache_response(self.req(), resp)
        assert not cc.cache.get(cache_url)

def test_update_cached_response_with_valid_headers(self):
        cached_resp = Mock(headers={"ETag": "jfd9094r808", "Content-Length": 100})

        # Set our content length to 200. That would be a mistake in
        # the server, but we'll handle it gracefully... for now.
        resp = Mock(headers={"ETag": "28371947465", "Content-Length": 200})
        cache = DictCache({self.url: cached_resp})

        cc = CacheController(cache)

        # skip our in/out processing
        cc.serializer = Mock()
        cc.serializer.loads.return_value = cached_resp
        cc.cache_url = Mock(return_value="http://foo.com")

        result = cc.update_cached_response(Mock(), resp)

        assert result.headers["ETag"] == resp.headers["ETag"]
        assert result.headers["Content-Length"] == 100

def cc(self):
        # Cache controller fixture
        return CacheController(Mock(), serializer=Mock())