public void Cars_RemoveCarFromList_ShouldRemoveACarFromAList() { //arrange Cars_Repository carRepo = new Cars_Repository(); Cars content = new Cars(CarType.Electric, 123000, 0, "Tesla", "X", 120, "123ABC"); Cars content2 = new Cars(CarType.Gas, 123000, 15.5, "Mazda", "3", 150, "321CBA"); //act carRepo.AddToList(content); carRepo.AddToList(content2); carRepo.RemovCarFromList("123ABC"); List <Cars> list = carRepo.GetList(); var actual = list.Count; var expected = 1; //assert Assert.AreEqual(actual, expected); }