public void TestGetLinks()
        {
            var testTweet = new Tweet("yahoo.com google.com message");
            var testList = new List<string>(1) { "http://yahoo.com" };
            var testList2 = new List<string>(1) { "http://google.com" };

            Assert.IsFalse(testList == _tweet.GetTopics());
            Assert.IsTrue(testList2[0] == _tweet.GetLinks()[0]);

            Assert.IsTrue(testTweet.GetLinks().Contains("yahoo.com"));
            Assert.IsTrue(testTweet.GetLinks().Contains("google.com"));
            Assert.IsFalse(testTweet.GetLinks().Contains("message"));

            Assert.IsTrue(testTweet.GetLinks().Count == 2);
        }
        public void TestRegexStrings()
        {
            //Testing Topic regex string "(#)((?:[A-Za-z0-9-_]*))"
            //Checking different tests like spaces and other markers interfering with the topic marker.
            var testTweet = new Tweet("#test # test ##test #@test @#test");

            Assert.IsTrue(testTweet.GetTopics().Contains("#test"));
            Assert.IsTrue(testTweet.GetTopics().Contains("#"));

            Assert.IsFalse(testTweet.GetTopics().Contains("test"));
            Assert.IsFalse(testTweet.GetTopics().Contains("##test"));
            Assert.IsFalse(testTweet.GetTopics().Contains("#@test"));
            Assert.IsFalse(testTweet.GetTopics().Contains("@#test"));

            //Testing "(@)((?:[A-Za-z0-9-_]*))"
            //Checking different tests like spaces and other markers interfering with the topic marker.
            var testTweet2 = new Tweet("@test @ test @@test #@test @#test");

            Assert.IsTrue(testTweet2.GetMentions().Contains("@test"));
            Assert.IsTrue(testTweet2.GetMentions().Contains("@"));

            Assert.IsFalse(testTweet2.GetMentions().Contains(" test"));
            Assert.IsFalse(testTweet2.GetMentions().Contains("@@test"));
            Assert.IsFalse(testTweet2.GetMentions().Contains("#@test"));
            Assert.IsFalse(testTweet2.GetMentions().Contains("@#test"));
            Assert.IsFalse(testTweet2.GetMentions().Contains("test"));

            //Testing "(http(s)?://)?([\w-]+\.)+[\w-]+(/\S\w[\w- ;,./?%&=]\S*)?"
            //Checking different tests like spaces and other markers interfering with the topic marker.
            var testTweet3 = new Tweet("http:// https:// google.com https://google.com website.net http://website.net");

            Assert.IsTrue(testTweet3.GetLinks().Contains("google.com"));
            Assert.IsTrue(testTweet3.GetLinks().Contains("https://google.com"));
            Assert.IsTrue(testTweet3.GetLinks().Contains("http://website.net"));
            Assert.IsTrue(testTweet3.GetLinks().Contains("website.net"));

            Assert.IsFalse(testTweet3.GetLinks().Contains("http://"));
            Assert.IsFalse(testTweet3.GetLinks().Contains("https://"));
        }