public void InvalidateCache()
{
var cache = new SimpleCache <Guid, string>(_expirationSpan, CacheExpirationTypes.Timed);
cache.AddItem(new CacheItem <Guid, string> {
Key = Guid.Empty, Value = string.Empty
});
var cachedCount = cache.Count();
cache.InvalidateCache();
Assert.AreNotEqual(cachedCount, cache.Count());
}
