public async Task AddAddressShouldAddAddressCorectly() { var addressRepository = new Mock <IRepository <Address> >(); var userRepository = new Mock <IRepository <ApplicationUser> >(); var userStoreMock = new Mock <IUserStore <ApplicationUser> >(); var userManager = new Mock <UserManager <ApplicationUser> >(userStoreMock.Object, null, null, null, null, null, null, null, null); userRepository.Setup(r => r.All()).Returns(new List <ApplicationUser> { new ApplicationUser { FirstName = "root" }, }.AsQueryable()); AddressBindingModel address = new AddressBindingModel(); var user = userRepository.Object.All().SingleOrDefault(x => x.FirstName == "root"); var service = new ApplicationUserService(userRepository.Object, addressRepository.Object, userManager.Object); await service.AddAddress <AddressBindingModel>(address, user.Id); Assert.Single(userRepository.Object.All().SingleOrDefault(x => x.FirstName == "root").Addresses); }