public void ChangeSentenceToWords_Sentence_ListOfWords() { WordCounter testWordCounter = new WordCounter("Hi", "How are you."); List <string> resultList = new List <string> { "how", "are", "you" }; testWordCounter.ChangeToLowerCase(); testWordCounter.ChangeSentenceToWords(); CollectionAssert.AreEqual(resultList, testWordCounter.GetWordsOfSentence()); }