public void removes_item_from_cache()
        {
            MongoDbApiOutputCache.Remove(_user1.Id.ToString());

            Assert.That(MongoCollection.Count(), Is.EqualTo(1));

            var users = MongoCollection
                        .FindAllAs <CachedItem>()
                        .Select(cachedItem => JsonSerializer.DeserializeFromString <UserFixture>(cachedItem.Value))
                        .ToList();

            Assert.That(users.First().Id, Is.Not.EqualTo(_user1.Id));
        }