public void GetProvider() { var repository = new ProviderList(); var newProvider = new Provider("Zhao Xie", "397 4th Ave S", "MN", "St. Cloud", "56301", 100000023434); var newProviderId = repository.AddProvider(newProvider); var provider = repository.GetProvider(newProviderId.Value); Assert.IsTrue(null != provider, "returned provider does not exist"); }