public void GetWordsStartingLikeShouldReturnOnlyTheRightWords() { var words = new List <string>() { "ho", "house", "car" }; wordsReaderMock .Setup(reader => reader.GetAllWords()) .Returns(words); repo = new WordsRepository(wordsReaderMock.Object); Assert.Equal(new List <string>() { "ho", "house" }, repo.GetWordsStartingLike("ho")); }