public void TestConvertNameIntoId() { var restRepo = new Mock <IRestaurantRepository>(); var reviewRepo = new Mock <IReviewerRepository>(); List <int> restList = new List <int>(); RestaurantInfo dummyRest = new RestaurantInfo(34, "repoTest", "test city", "test street", "descrip", "testemail"); restList.Add(dummyRest.restaurantId); restRepo.Setup(i => i.ConvertNameIntoId("repoTest")).Returns(new List <int> { 34 }); var service = new RestaurantService(restRepo.Object, reviewRepo.Object); var expected = restList; var actual = service.ConvertNameIntoId("repoTest"); Assert.AreEqual(expected, actual, "Nope"); }