public void returns_false_if_item_is_not_in_collection()
        {
            var result = MongoDbApiOutputCache.Contains("i know this won't be there");

            Assert.That(result, Is.False);
        }
        public void returns_true_if_item_is_in_collection()
        {
            var result = MongoDbApiOutputCache.Contains(_user1.Id.ToString());

            Assert.That(result, Is.True);
        }