public void TotalTweetsForNancyShouldBe1()
        {
            Given_tweets_from_multiple_users_with_mentions();

            var result = TweetAggregator.Process(_tweets);

            result["nancy"].TotalTweets.Should().Be(1);
        }
        public void TotalMentionsOfDrewByBobShouldBe1()
        {
            Given_tweets_from_multiple_users_with_mentions();

            var result = TweetAggregator.Process(_tweets);

            result["bob"].Mentions["drew"].Should().Be(1);
        }
        public void TotalMentionsOfNancyByBobShouldBe3()
        {
            Given_tweets_from_multiple_users_with_mentions();

            var result = TweetAggregator.Process(_tweets);

            result["bob"].Mentions["nancy"].Should().Be(3);
        }
        public void TotalUniqueMentionsByBobShouldBe2()
        {
            Given_tweets_from_multiple_users_with_mentions();

            var result = TweetAggregator.Process(_tweets);

            result["bob"].Mentions.Keys.Count.Should().Be(2);
        }
        public void TotalTweetsForBobShouldBe3()
        {
            Given_tweets_from_multiple_users_with_mentions();

            var result = TweetAggregator.Process(_tweets);

            result["bob"].TotalTweets.Should().Be(3);
        }
        public void TotalUniqueMentionsByNancyShouldBe0()
        {
            Given_tweets_from_multiple_users_with_mentions();

            var result = TweetAggregator.Process(_tweets);

            result["nancy"].Mentions.Count.Should().Be(0);
        }