public void AddPhoneShouldMergeWithNewPhoneNumbers() { IPhonebookRepository repository = new PhonebookRepositoryWithDictionary(); repository.AddPhone("Pesho", new List<string>() { "112", "911" }); var result = repository.AddPhone("Pesho", new List<string>() { "113" }); Assert.AreEqual(3, repository.ListEntries(0, 1)[0].PhoneNumbers.Count); }