public void TestGetAllTweetText()
        {
            List <Tweet> tweets = new List <Tweet> {
                tweet1, tweet2, tweet3
            };
            TwitterUser  user1   = new TwitterUser(tweets, "testUser");
            List <Tweet> tweets2 = new List <Tweet> {
                tweet1, tweet2
            };
            TwitterUser  user2   = new TwitterUser(tweets2, "testUser");
            List <Tweet> tweets3 = new List <Tweet> {
                tweet2
            };
            TwitterUser user3 = new TwitterUser(tweets3, "testUser");

            List <string> ans1 = new List <string> {
                "Wow", "", "What an unordinarily verbose tweet"
            };
            List <string> ans2 = new List <string> {
                "Wow", ""
            };
            List <string> ans3 = new List <string> {
                ""
            };

            List <string> ans1Actual = user1.GetAllTweetText();

            CollectionAssert.AreEqual(ans1, user1.GetAllTweetText(), "Incorrect tweet text returned");
            CollectionAssert.AreEqual(ans2, user2.GetAllTweetText(), "Incorrect tweet text returned");
            CollectionAssert.AreEqual(ans3, user3.GetAllTweetText(), "Incorrect tweet text returned");
        }