How to mock CacheFactory (not $cacheFactory)?

I'm using CacheFactory provided by angular-cache.js git link which I need to mock in order to test my factory. This is the code I'm using in the factory for caching.

var cache = CacheFactory.createCache('documentTypeCache', {
              deleteOnExpire: 'aggressive',
              recycleFreq: 55 * 60 * 1000,
              maxAge: 60 * 60 * 1000,
              storageMode: 'sessionStorage'
            });

And this is how I'm mocking it in my tests.

mockCacheFactory = function(){
                    this.createCache = jasmine.createSpy('createCache');
                    this.$get = function(){};
                };
                $provide.provider('CacheFactory', mockCacheFactory);

However, the tests fail with: Undefined is not an object which points to CacheFactory.createCache.

I tried googling around but seems like there is not much information available related to angular-cache. Any ideas on how to do this?