public void TestAddNotKnown() { var CorrectQuestion = new Question() { Text = "Test Question", ChosenAnswer = new Answer { Text = "First Answer" }, Answers = new List <Answer>() { new Answer() { Text = "First Answer", IsCorrect = true }, new Answer() { Text = "Second Answer", IsCorrect = false } } }; testInterpreter.AddNotKnown(CorrectQuestion); Assert.AreEqual(CorrectQuestion.Answers.Count, 3); }